Torsionally Rigid Disc Couplings - Maryland Metrics

RFC

RING-flex®

Torsionally Rigid Disc Couplings

RINGFEDER Products are available from MARYLAND METRICS

P.O. Box 261 Owings Mills, MD 21117 USA email: [email protected] web: http://mdmetric.com

phones: (410)358-3130 (800)638-1830 faxes: (410)358-3142 (800)872-9329

RINGFEDER CORPORATION FDC-30-2

RING-flex® Couplings

Advantages and Features

• Accommodate Angular, Axial, • Long Life
and Radial Misalignments • All Metal Construction
• NO Backlash
• Operate Without Wear • High Torque Capacity
• NO Maintenance or Lubrication • Low Restoring Force
• High Torsional Rigidity
• Operate at High Temperatures

RING-flex® Couplings 6 and 8 bolt disc design

• Higher Speed Capacities
• Increased Angular Misalignment Capacity (6 bolt = 1º – 1.5º)
• Disc Pack can be Piloted to Hub for Repeatable Balancing per API 671.
• Fail-safe Hardware Available

Fig. 1 Finite Element Analysis

Ringfeder Corporation is very happy to introduce a “NEW” laminated disc pack, which
allows higher misalignments and speed capacities than previous designs. The design
was developed through Finite Element Analysis to maximize the allowable misalignment
and disc pack life without losing any torque capacity.

2 RINGFEDER CORPORATION

RING-flex® Couplings with Ringfeder® Shrink Discs®

• Eliminates ALL Backlash in Hub Connection
• Eliminates Interference and Press Fit in Hub Connection
• Allows Axial Flexibility during Assembly
• Great for Last Minute Timing Between Hubs
• Eliminates Failures from Poorly Fit Keys

WORKING PRINCIPLE

Fig. 2 Shrink Disc® over hub projection

Shrink Discs® are external keyless shaft/hub locking devices installed over hub projections. By tightening the locking
screws, the locking collars exert radial forces on the tapered inner rings and the hub. After bridging the fit clearances,
radial clamping pressure is generated between shaft and hub establishing a solid, frictional connection. For adjustment
or removal, just loosen the screws.

Fig. 3 RING-flex® coupling with Ringfeder Shrink Discs® on Fig. 4 RING-flex® coupling on fan drive.
main drive in environmental test chamber.

RING-flex® Couplings – Unique designs available

Ringfeder Corporation has a large engineering staff that specializes in providing unique solutions to
your coupling requirements. These solutions can include the following:

Flange Mounted Couplings Close-Coupled Couplings Extra Long Couplings

Fail-Safe Couplings High Speed Couplings

Please call for assistance.

RINGFEDER CORPORATION 3

Range and Characteristics

Fig. 5 Angular and radial misalignment Axial misalignment

SERIES G SIZE NOMINAL OUTSIDE MAX. AXIAL
SPEED
Applications: Economical design for general G 10-4 TORQUE DIAMETER UNBALANCED MISALIGN.
purpose use at low and medium speeds with good G 20-4 (rpm)
G 30-4 CAPACITY (inches) +/- Ka
flexibility and low end thrust. See pages 10-12. G 40-4 4500 (inches)
G 50-4 (in-lbs) (mm) 4300
4 Bolt Design G 60-4 4200 (mm)
Element Pack consists of G 70-4 (Nm) 3.19 4000
G 80-4 81 3800 0.11
individual discs 797 3.66 3600 2.7
90 93 3000 0.12
Misalignment Capability 1593 4.09 3000 3.0
180 104 0.15
angular: KW = 1° per element 2213 4.96 3.7
axial: 250 126 0.17
Ka = Double Flexing 5045 5.63 4.2
radial: Single Flexing = Ka/2 570 143 0.19
KR = 0.017 inches x L 7878 6.61 4.9
where ‘L’ = distance between disc pack 890 168 0.25
10090 7.64 6.4
GS - Single Flexing XGS - Single Flexing w/SD 1140 194 0.27
GD - Double Flexing XGD - Double Flexing w/SD 15932 8.43 6.9
GC - Close Coupled XGC - Close Coupled w/SD 1800 214 0.31
21685 8.0
2450

4 RINGFEDER CORPORATION

Range and Characteristics

SERIES H SIZE NOMINAL OUTSIDE MAX. AXIAL
SPEED
Applications: NEW laminated disc pack design for 110-6 TORQUE DIAMETER UNBALANCED MISALIGN.
applications requiring higher speeds and greater 132-6 (rpm)
158-6 CAPACITY (inches) +/- Ka
misalignment capability. 185-6 7200
See pages 13, 14, 17 and 18. 202-6 (in-lbs) (mm) 5840 (inches)
228-6 4920
6 Bolt Design 255-6 (Nm) 4.33 4200 (mm)
Laminated Disc Pack 278-6 110 3840
302-6 5090 5.20 3400 0.08
Misalignment Capability 325-6 575 132 3080 2.1
345-6 9740 6.22 2800 0.10
angular: KW = 1.5° per element up to size 185 380-6 1100 158 2560 2.6
= 1° per element above size 185 410-6 17700 7.28 2400 0.12
440-6 2000 185 2200 3.1
axial: Ka = Double Flexing 475-6 29210 7.95 2040 0.15
radial: Single Flexing = Ka/2 505-6 3300 202 1880 3.7
KR = 0.026 inches x L, up to size 185 40710 8.98 1740 0.15
4600 228 1680 3.8
0.017 inches x L, above size 185 61960 10.04 1520 0.17
where ‘L’ = distance between disc pack 7000 255 4.2
90280 10.94 0.19
HS - Single Flexing XHS - Single Flexing w/SD 10200 278 4.7
HD - Double Flexing XHD - Double Flexing w/SD 125680 11.89 0.20
HC - Close Coupled 14200 302 5.2
177010 12.80 0.22
20000 325 5.7
221270 13.58 0.26
25000 345 6.5
274370 14.96 0.27
31000 380 6.9
374390 16.14 0.30
42300 410 7.6
505380 17.32 0.32
57100 440 8.2
650530 18.70 0.35
73500 475 8.8
814270 19.88 0.37
92000 505 9.5
1035500 0.40
117000 10.1

RINGFEDER CORPORATION 5

Range and Characteristics

SERIES H SIZE NOMINAL OUTSIDE MAX. AXIAL
SPEED
Applications: NEW laminated disc pack design for 278-8 TORQUE DIAMETER UNBALANCED MISALIGN.
applications requiring higher torques and greater 302-8 (rpm)
325-8 CAPACITY (inches) +/- Ka
misalignment capability. 345-8 2800
See pages 15, 16, 19 and 20. 380-8 (in-lbs) (mm) 2560 (inches)
410-8 2400
8 Bolt Design 440-8 (Nm) 10.94 2200 (mm)
Laminated Disc Pack 475-8 278 2040
505-8 177000 11.89 1880 0.15
Misalignment Capability 540-8 20000 302 1740 3.7
570-8 266000 12.80 1680 0.16
angular: KW = 0.5° per element 605-8 30000 325 1520 4
axial: 635-8 327000 13.58 1440 0.17
Ka = Double Flexing 675-8 37000 345 1360 4.3
radial: Single Flexing = Ka/2 700-8 407000 14.96 1280 0.18
KR = 0.009 inches x L 730-8 46000 380 1240 4.6
760-8 558000 16.14 1160 0.20
where ‘L’ = distance between disc pack 63000 410 1120 5
761000 17.32 1080 0.21
HS - Single Flexing XHS - Single Flexing w/SD 86000 440 1040 5.4
HD - Double Flexing XHD - Double Flexing w/SD 974000 18.70 0.23
HC - Close Coupled 110000 475 5.8
1221000 19.88 0.25
138000 505 6.3
1549000 21.26 0.26
175000 540 6.7
1947000 22.44 0.28
220000 570 7.2
2292000 23.82 0.30
259000 605 7.6
2788000 25.00 0.31
315000 635 7.8
3390000 26.57 0.32
383000 675 8.2
4018000 27.56 0.33
454000 700 8.4
4673000 28.74 0.35
528000 730 8.9
5381000 29.92 0.36
608000 760 9.2
6196000 0.38
700000 9.6

6 RINGFEDER CORPORATION

RINGFEDER SHRINK DISC® SPECIFICATIONS

Shrink Disc® Dimensions - Low Inertia Series

SHRINK SHAFT RANGE MAX TORQUE CAPACITY D1 H Hub configuration for Shrink Disc® connection
DISC Fig. 6
SIZE dw RANGE (inches) (inches)
(mm) (mm)
10 (inches) MT
13 (in-lbs) 1.18 0.58
16 (mm) 30 14.8
24 (Nm) 1.30 0.61
30 0.24 0.31 33 15.5
36 68 36 144 1.50 0.69
44 4.1 16.3 38.1 17.5
50 0.31 0.43 130 410 1.87 0.75
8 11 14.7 46.3 47.5 19.0
349 730 2.10 0.83
0.43 0.55 39.4 82.5 53.3 21.0
11 14 722 1750 2.50 0.93
0.55 0.79 81.6 198 63.5 23.5
14 20 1335 2800 2.85 1.00
0.79 1.02 151 316 72.4 25.4
20 26 3250 5690 3.19 1.08
1.02 1.26 367 643 81 27.5
26 32 4612 6900
1.26 1.46 521 780
32 37 5374 9000
1.46 1.69 607 1017
37 42.9

Shrink Disc® Dimensions - 4071 Series

RfN SHAFT RANGE MAX TORQUE CAPACITY D1 H RfN SHAFT RANGE MAX TORQUE CAPACITY D1 H

4071 dw RANGE 4071 dw RANGE
SIZE MT SIZE MT

(inches) (in-lbs) (inches) (inches) (inches) (in-lbs) (inches) (inches)

(mm) (Nm) (mm) (mm) (mm) (Nm) (mm) (mm)

24 0.75 0.83 1505 2213 1.97 0.91 185 5.31 5.71 460237 548745 12.99 3.78
19 21 170 250 50 23 135
145 52000 62000 330 96

30 0.83 1.02 1668 3275 2.36 0.98 195 5.51 6.10 575297 721334 13.78 3.78
21 26 188 370 60 25 140
155 65000 81500 350 96

1.02 1.25 3894 5576 2.83 1.08 5.91 6.30 654984 761208 13.78 3.78
36 26 31.8 440 630 72 27.5 200 150 160 74000 86000 350
96

44 1.25 1.42 6287 7612 3.15 1.16 220 6.30 6.69 840818 973579 14.57 4.49
31.8 36 710 860 80 29.5 160 170 95000 110000 370 114

1.42 1.65 8316 12214 3.54 1.24 6.69 7.48 1062086 1380712 15.94 4.80
50 36 42 940 1380 90 31.5 240 170 190 120000 156000 405 122

55 1.65 1.89 10267 16639 3.94 1.36 260 7.48 8.27 1451518 1814398 16.93 5.24
42 48 1160 1880 100 34.5 190 210 164000 205000 430 133

1.89 2.04 16374 21242 4.33 1.36 8.27 9.06 1920708 2389824 18.11 5.79
62 48 52 1850 2400 110 34.5 280 210 230 217000 270000 460 147

68 1.97 2.36 17701 27880 4.53 1.36 300 9.06 9.65 2433948 2787977 19.09 6.10
50 60 2000 3150 115 34.5 230 245 275000 315000 485 155

75 2.17 2.56 22127 34960 5.43 1.50 9.45 10.24 2761425 3310169 20.47 6.10
320 240 260 312000 374000 520 155
55 65 2500 3950 138 38

80 2.36 2.76 28322 40713 5.71 1.50 340 9.84 10.63 3451781 4071331 22.44 6.65
250 270 390000 460000 570 169
60 70 3200 4600 145 38

90 2.56 2.95 42048 64176 6.10 1.75 350 10.63 11.22 3912018 4425360 22.83 6.89
65 75 4750 7250 155 44.5 270 285 442000 500000 580 175

2.76 3.15 61070 79656 6.69 1.95 11.02 11.61 4097883 4620076 23.23 6.89
100 70 360 280 295 463000 522000 590 175
80 6900 9000 170 49.5

110 2.95 3.35 63725 95588 7.28 2.24 380 11.42 12.20 5018358 5823774 25.39 7.20
75 85 7200 10800 185 57 290 310 567000 658000 645 183

3.35 3.74 97358 132761 8.46 2.40 11.81 12.60 5522849 6354817 25.98 7.20
125 85 390 300 320 624000 718000 660 183
95 11000 15000 215 61

140 3.74 4.13 133646 177899 9.06 2.70 400 12.40 12.99 5929982 6584936 26.77 7.20
95 105 15100 20100 230 68.5 315 330 670000 744000 680 183

4.13 4.53 194716 247820 10.43 2.85 12.99 13.78 6903562 7965648 27.17 7.99
155 105 115 22000 28000 265 72.5 420 330 350 780000 900000 690 203

165 4.53 4.92 274372 345178 11.42 3.19 440 13.39 14.17 7134000 8116548 29.53 8.54
115 340 360 806000 917000 750 217
125 31000 39000 290 81

4.92 5.31 318626 398282 11.81 3.19
175 125 135 36000 45000 300
81 If MT is less than coupling torque capacity, the max Coupling Torque Capacity=MT

RINGFEDER CORPORATION 7

SELECTION GUIDE

The selection of the coupling size depends 5. If the RINGFEDER Shrink Disc® connection is
entirely on the torque to be transmitted and used, verify that the torque capacity of the
required shaft sizes. However, for the selection Shrink Disc® connection does not limit the
of the coupling type, application conditions (e.g., couplings torque capacity. The Shrink Disc®
shaft misalignments, expansions and operating torque capacities for each shaft size can be
speeds) must be taken into consideration. For any found on page 7.
special applications, please consult with us.
6. Use the chart below to verify that your cou-
When selecting a coupling size, make sure that pling does or does not need to be dynamically
under all operating conditions its torque capaci- balanced.
ty and speed range are not exceeded.

1. Calculate the driving torque (TAN) to be trans-
mitted from

TAN(in-lbs) = 63000 x HP/RPM Weight (Kg)

2. Determine required coupling Nominal Torque Fig. 7 Dynamic Balancing Guide
Capacity (TKN) by finding the appropriate
service factor (SM) in Table 1 for your applica- Table 1 Service Factor (Sm)
tion. Multiply the torque calculated above
(TAN) by this service factor. Load Driven Equipment Driving Equipment

TKN(in-lbs) = TAN x SM Motor or Reciprocating
Turbine Engine
NOTE: RING-flex® Couplings can transmit
higher torques for a short period of time with- Uniform Centrifugal Pumps: 1.0 1.5
out having to consider an additional service Conveyors-Evenly Loaded; 1.5 2.0
factor. Please consult coupling data sheets Light Alternators; Fans and Blowers-
(pages 10-20) for Maximum Torque values. Shock Light Duty; Generators-Evenly 2.0 2.5
Loaded; Mixers-Liquid 2.5 3.0
3. Check if existing or predicted axial, angular Medium
and radial misalignment are within permissi- Shock Centrifugal Pumps; Generators-
ble values as shown in the catalog, pages Pulsating Load; Grinders;
4-6. If any one of the misalignments is close Heavy Hydraulic Pumps; Machine
to the maximum allowable, the maximum Shock Tools; Oscillating Pumps,
misalignment in the other directions and the Textile Machinery;
torque capacity will be effected. For this rea- Woodworking Machinery
son, we recommend selecting a coupling with
more misalignment capacity than required. Air Compressors-Multi-Cylin-
der; Cranes; Elevators; Hoists;
4. Verify that the maximum hub bore and speed Punch Presses; Reciprocating
required do not exceed the maximum values Pumps; Ship Drives
for the coupling.
Air Compressors-Single Cylin-
NOTE: For a given hub size, larger shafts can der; Dredges; Drilling Rigs;
be used with the RINGFEDER Shrink Disc® Mining Machinery; Rubber Mixers
than with traditional keyed connections.
The service factors listed are intended only as a general guide.
For typical service factors used in various applications, refer to “AGMA Standard
Load Classification and Service Factors for Flexible Couplings” (AGMA 514.02)

8 RINGFEDER CORPORATION

Selection Example #1 – Selection Example #2 –
Bore and Keyway: Shrink Disc® Connection:

A 60 HP, 4 cylinder diesel engine is to drive a A 200 HP motor is driving a gearbox at 1750
centrifugal pump at 1750 rpm. Both shafts are rpm. This drive is running the transfer system
1.5” in diameter. Distance between shaft ends is for an automated machining system. The sys-
3.5”. tem starts and stops 10 times per minute. Both
shaft sizes are 2.5”. Distance between shaft
1. A coupling with (2) Disc Pack is required, ends is 6”.
because the engine crank shaft and pump
shaft are most likely supported by two bear- 1. A coupling with (2) Disc Pack is required,
ings. Therefore, parallel misalignment because the motor and gearbox shafts are
between the shafts is possible. most likely both supported by two bearings.
Therefore, parallel misalignment between the
2. Driving Torque: shafts is possible.
TAN(in-lbs) = 63000 x 60 / 1750 = 2160 in-lbs
2. Driving Torque:
3.Required Coupling torque capacity based on TAN (in-lbs) = 63000 x 200 / 1750 = 7200 in-lbs
a SM = 2.0:
3. Required Coupling torque capacity based on
TKN(in-lbs) = 2160 x (2.0) = 4320 in-lbs a SM = 2.0:

Selected Coupling TKN (in-lbs) = 7200 x (2.0) = 14400 in-lbs

HD 110-6: TKN (in-lbs) = 5090 in-lbs >=4320 in-lbs Selected Coupling

This coupling can also accommodate the 1750 XHD 158-6: TKN (in-lbs) = 17700 in-lbs > 14400 in-lbs
rpm without dynamic balancing, the 3.5”
between shaft ends and the (2) 1.5” shafts. This coupling can also accommodate the 1750
rpm without dynamic balancing, and the (2) 2.5”
shafts.

4. Select a Shrink Disc® for a 2.5” shaft on page 7.
Shrink Disc® Size: 75 Rfn 4071
Torque Capacity of Shrink Disc® = 34000 in-lbs

This reduces the coupling’s maximum torque
capacity of 35400 in-lbs to 34000 in-lbs.

Fig. 8 5. With the RINGFEDER Shrink Disc®
Connection, the 6” distance between shaft
ends can be accommodated with the
standard double flexing coupling. The shaft
needs to be only 1.5” in each hub to ensure a
proper Shrink Disc® Connection. This gives
the coupling the flexibility to have a distance
between shafts of 4.88” to 7.4”. 6” is in that
range. See Fig. 8.

RINGFEDER CORPORATION 9

SPECIFICATIONS

GS Coupling — 4 BOLT

Fig. 9

COUPLING A D D3 D5 LF S1 LO NOMINAL MAXIMUM MAXIMUM WEIGHT MOMENT AXIAL ANGULAR
SIZE max TORQUE MISALIGN. MISALIGN.
(inches) (inches) (inches) CAPACITY TORQUE SPEED (lbs) OF INERTIA
(mm) (mm) (mm) (in-lbs) (kg) WR2 +/- Ka Kw
CAPACITY UNBALANCED (lb-in2) (inches)
1.97 0.27 4.21 (Nm) (mm)
(inches) (inches) (inches) (inches) 50 6.9 106.9 (in-lbs) (kg-m2)
2.17 0.32 4.65
(mm) (mm) (mm) (mm) 55 8.1 118.1 (Nm) (rpm)
2.17 0.34 4.67
GS 10-4 3.19 1.25 1.77 1.14 55 8.6 118.6 797 1196 4500 2.6 2.46 0.05 1˚
GS 20-4 81 32 45 29 2.56 0.48 5.60 90 135 4300 1.2 0.0007 1.4 1˚
GS 30-4 3.66 1.38 1.97 1.26 65 12.2 142.2 1593 2390 4200 3.9 5.03 0.06 1˚
GS 40-4 93 35 50 32 2.76 0.50 6.01 180 270 4000 1.8 0.001 1.5 1˚
GS 50-4 4.09 1.63 2.40 1.58 70 12.7 152.7 2213 3320 3800 5.3 8.63 0.07 1˚
GS 60-4 104 41 61 40 2.95 0.56 6.47 250 375 3600 2.4 0.003 1.8 1˚
GS 70-4 4.96 1.88 2.76 1.77 75 14.1 164.2 5045 7568 3000 9.4 22.5 0.08 1˚
GS 80-4 126 48 70 45 3.54 0.61 7.70 570 855 3000 4.3 0.007 2.1 1˚
5.63 2.13 3.19 1.97 90 15.5 196 7878 11817 14.7 44.3 0.10
143 54 81 50 4.33 0.81 9.47 890 1335 6.7 0.013 2.4
6.61 2.94 4.13 2.68 110 20.6 240.6 10090 15135 20.1 93.3 0.13
168 75 105 68 1140 1710 9.1 0.027 3.2
7.64 2.76 4.65 2.99 15932 23898 36 201.6 0.14
194 70 118 76 1800 2700 16.4 0.059 3.5
8.43 4.33 5.35 3.50 21685 32528 51 349.5 0.16
214 110 136 89 2450 3675 23.2 0.102 4.0

Hub = Steel Max 'D' is for bores with standard keyways
Disc Pack = Stainless Steel Weight and Moment of Inertia - Assuming maximum bores
Hardware = Steel

**

XGS Coupling — 4 BOLT
with Shrink Disc® connection

**

Fig. 10

COUPLING A SHRINK D D3 D5 LF S1 LO NOMINAL MAXIMUM MAXIMUM WEIGHT MOMENT AXIAL ANGULAR
SIZE DISC MAX TORQUE TORQUE SPEED
(inches) SERIES (inches) (inches) (inches) (inches) (inches) CAPACITY CAPACITY UNBALANCED (lbs) OF INERTIA MISALIGN MISALIGN
(mm) (inches) (mm) (mm) (mm) (mm) (mm) (in-lbs) (in-lbs) (kg)
Rfn 4071 (mm) WR2 +/- Ka Kw
MAX 1.77 1.14 1.97 (Nm) (Nm) (rpm) (lb-in2) (inches)
1.25 45 29 50
32 1.97 1.26 2.17 (kg-m2) (mm)
1.42 50 32 55
XGS 10-4 3.19 36 36 2.40 1.58 2.17 0.27 4.21 797 1196 4500 3.9 4.74 0.05 1˚
XGS 20-4 81 1.89 61 40 55 6.9 106.9 90 135 1.8 0.0014 1.4 1˚
XGS 30-4 48 2.76 1.77 2.56 1˚
XGS 40-4 3.66 44 2.05 70 45 65 0.32 4.65 1593 2390 4300 6.2 8.89 0.06 1˚
XGS 50-4 93 52 3.19 1.97 2.76 8.1 118.1 180 270 2.8 0.003 1.5 1˚
XGS 60-4 2.76 81 50 70 1˚
XGS 70-4 4.09 55 70 4.13 2.68 2.95 0.34 4.67 2213 3320 4200 8.6 19.6 0.07 1˚
XGS 80-4 104 2.95 105 68 75 8.6 118.6 250 375 3.9 0.006 1.8 1˚
75 4.65 2.99 3.54
4.96 62 3.35 118 76 90 0.48 5.60 5045 7568 4000 13.4 38.0 0.08
126 85 5.35 3.50 4.33 12.2 142.2 570 855 6.1 0.011 2.1
3.74 136 89 110
5.63 80* 95 0.50 6.01 7878 11817 3800 22.7 97.2 0.10
143 12.7 152.7 890 1335 10.3 0.028 2.4

6.61 90* 0.56 6.47 10090 15135 3600 30.9 171.4 0.13
168 14.1 164.2 1140 1710 14.0 0.050 3.2

7.64 90 0.61 7.70 15932 23898 3000 51 262.3 0.14
194 15.5 196 1800 2700 23.2 0.077 3.5

8.43 125 0.81 9.47 21685 32528 3000 78 758.3 0.16
214 20.6 240.6 2450 3675 35.5 0.222 4.0

Hub = Steel Max 'D' is for bores with Shrink Disc® Connection
Disc Pack = Stainless Steel Weight and Moment of Inertia - Assuming maximum bores and Shrink Disc®
Hardware = Steel * Shrink Disc® bolts hang over hub end
** For Dimensions ‘D1’ and ‘H’ please see page 7

10 RINGFEDER CORPORATION

SPECIFICATIONS

GC Coupling — 4 BOLT

Fig. 11

COUPLING A D D3 D5 LF S3 LO NOMINAL MAXIMUM MAXIMUM WEIGHT MOMENT AXIAL ANGULAR RADIAL
SIZE MAX
(inches) (inches) (inches) TORQUE TORQUE SPEED (lbs) OF INERTIA MISALIGN. MISALIGN. MISALIGN.
(mm) (mm) (mm) (kg)
CAPACITY CAPACITY UNBALANCED WR2 +/- Ka Kw KR
1.97 1.46 5.40 3.2 (lb-in2) (inches) PER (inches)
(inches) (inches) (inches) (inches) 50 37 137 (in-lbs) (in-lbs) 1.5
2.17 1.60 5.94 4.9
(mm) (mm) (mm) (mm) 55 41 151 (Nm) (Nm) (rpm) 2.2 (kg-m2) (mm) DISC PACK (mm)
2.17 1.58 5.92 6.5
GC 10-4 3.19 1.25 1.77 1.14 55 40 150 797 1196 4500 2.9 2.82 0.11 1˚ 0.02
GC 20-4 81 32 45 29 2.56 2.17 7.29 90 135 4300 11.8 0.001 2.7 0.5
GC 30-4 3.66 1.38 1.97 1.26 65 55 185 1593 2390 4200 5.4 5.94 0.12
GC 40-4 93 35 50 32 2.76 2.58 8.10 180 270 4000 17.8 0.002 3.0 1˚ 0.02
GC 50-4 4.09 1.63 2.40 1.58 70 66 206 2213 3320 3800 8.1 10.0 0.15 0.5
GC 60-4 104 41 61 40 2.95 2.66 8.56 250 375 3600 23.7 0.003 3.7
GC 70-4 4.96 1.88 2.76 1.77 75 68 217 5045 7568 3000 10.8 26.7 0.17 1˚ 0.02
GC 80-4 126 48 70 45 3.54 3.36 10.44 570 855 3000 45.5 0.008 4.2 0.5
5.63 2.13 3.19 1.97 90 85 265 7878 11817 20.7 52.8 0.19
143 54 81 50 4.33 3.34 12.00 890 1335 63.6 0.015 4.9 1˚ 0.03
6.61 2.94 4.13 2.68 110 84.8 305 10090 15135 28.9 116.1 0.25 0.8
168 75 105 68 1140 1710 0.034 6.4
7.64 2.76 4.65 2.99 15932 23898 244 0.27 1˚ 0.04
194 70 118 76 1800 2700 0.071 6.9 1.0
8.43 4.33 5.35 3.50 21685 32528 416.7 0.31
214 110 136 89 2450 3675 0.122 8.0 1˚ 0.04
1.0

1˚ 0.05
1.3

1˚ 0.05
1.3

Hub = Steel Hubs can be shorter upon request - Call Ringfeder Corp.
Spacer = Steel Max 'D' is for bores with standard keyways
Disc Pack = Stainless Steel Weight and Moment of Inertia - Assuming maximum bores
Hardware = Steel
*
XGC Coupling — 4 BOLT
with Shrink Disc® connection

*

Fig. 12

COUPLING A SHRINK D D3 D5 LF S3 LO NOMINAL MAXIMUM MAXIMUM WEIGHT MOMENT AXIAL ANGULAR RADIAL
SIZE DISC MAX TORQUE MISALIGN. MISALIGN. MISALIGN.
(inches) SERIES (inches) (inches) (inches) (inches) (inches) CAPACITY TORQUE SPEED OF INERTIA
(mm) (inches) (mm) (mm) (mm) (mm) (mm) (in-lbs) WR2 +/- Ka Kw KR
Rfn 4071 (mm) CAPACITY UNBALANCED (lb-in2) (inches) PER (inches)
MAX 1.77 1.14 1.97 1.46 (Nm) (mm) DISC PACK (mm)
1.25 45 29 50 37 (in-lbs) (lbs) (kg-m2)
32 1.97 1.26 2.17 1.60
1.42 50 32 55 41 (Nm) (rpm) (kg)
36 2.40 1.58 2.17 1.58
XGC 10-4 3.19 36 1.65 61 40 55 40 5.40 797 1196 4500 4.4 5.10 0.11 1˚ 0.02
81 42 2.76 1.77 2.56 2.17 137 90 135 2.0 0.001 2.7 0.5
2.05 70 45 65 55
XGC 20-4 3.66 44 52 3.19 1.97 2.76 2.58 5.94 1593 2390 4300 7.2 9.80 0.12 1˚ 0.02
93 2.36 81 50 70 66 151 180 270 3.3 0.003 3.0 0.5
60 4.13 2.68 2.95 2.66
XGC 30-4 4.09 50 2.76 105 68 75 68 5.92 2213 3320 4200 9.0 16.2 0.15 1˚ 0.02
104 70 4.65 2.99 3.54 3.36 150 250 375 4.1 0.005 3.7 0.5
3.35 118 76 90 85
XGC 40-4 4.96 62 85 5.35 3.50 4.33 3.34 7.29 5045 7568 4000 15.8 42.2 0.17 1˚ 0.03
126 3.74 136 89 110 84.8 185 570 855 7.2 0.012 4.2 0.8
95
XGC 50-4 5.63 68 8.10 7878 11817 3800 20.7 68.3 0.19 1˚ 0.04
143 206 890 1335 9.4 0.020 4.9 1.0

XGC 60-4 6.61 80 8.56 10090 15135 3600 32.3 161.9 0.25 1˚ 0.04
168 217 1140 1710 14.7 0.047 6.4 1.0

XGC 70-4 7.64 90 10.44 15932 23898 3000 59.7 304.6 0.27 1˚ 0.05
194 265 1800 2700 27.1 0.089 6.9 1.3

XGC 80-4 8.43 125 12.00 21685 32528 3000 90.1 652.8 0.31 1˚ 0.05
214 305 2450 3675 41.0 0.191 8.0 1.3

Hub = Steel Hubs can be shorter upon request - Call Ringfeder Corp.
Spacer = Steel Max 'D' is for bores with Shrink Disc® Connection
Disc Pack = Stainless Steel Weight and Moment of Inertia - Assuming maximum bores and Shrink Disc®
Hardware = Steel * For Dimensions ‘D1’ and ‘H’ please see page 7

RINGFEDER CORPORATION 11

SPECIFICATIONS

GD Coupling — 4 BOLT

Fig. 13

COUPLING A D D3 D5 LF S1 S3 LO NOMINAL MAXIMUM MAXIMUM WEIGHT MOMENT AXIAL ANGULAR RADIAL
SIZE MAX TORQUE SPEED MISALIGN. MISALIGN.
(inches) (inches) (inches) (inches) TORQUE CAPACITY UNBALANCED (lbs) OF INERTIA MISALIGN.
(inches) (inches) (inches) (inches) (mm) (mm) (mm) (mm) (in-lbs) (kg) WR2 +/- Ka Kw
CAPACITY (lb-in2) (inches) PER KR
(mm) (mm) (mm) (mm) 1.97 0.27 2.25 6.19 (Nm) (rpm) 4.3 (kg-m2) (mm) DSIC PACK (inches)
50 6.9 57 157 (in-lbs) 2.0
GD 10-4 3.19 1.25 1.77 1.14 2.17 0.32 2.75 7.09 1196 4500 6.8 4.07 0.11 1˚ (mm)
GD 20-4 81 32 45 29 55 8.1 70 180 (Nm) 135 4300 3.1 0.001 2.7 1˚
GD 30-4 3.66 1.38 1.97 1.26 2.17 0.34 2.59 6.93 2390 4200 8.8 0.12 1˚ 0.02
GD 40-4 93 35 50 32 55 8.6 66 176 797 270 4000 4.0 8.4 3.0 1˚ 0.5
GD 50-4 4.09 1.63 2.40 1.58 2.56 0.48 3.31 8.43 90 3320 3800 16.1 0.002 0.15 1˚ 0.02
GD 60-4 104 41 61 40 65 12.2 84 214 1593 375 3600 7.3 14.2 3.7 1˚ 0.6
GD 70-4 4.96 1.88 2.76 1.77 2.76 0.50 3.64 9.16 180 7568 3000 25.6 0.004 0.17 1˚ 0.02
GD 80-4 126 48 70 45 70 12.7 92 233 2213 855 3000 11.6 38.4 4.2 1˚ 0.5
5.63 2.13 3.19 1.97 2.95 0.56 3.83 9.68 250 11817 31 0.011 0.19 0.03
143 54 81 50 75 14.1 97 246 5045 1335 14.1 76.4 4.9 0.7
6.61 2.94 4.13 2.68 3.54 0.61 4.61 11.69 570 15135 56.4 0.022 0.25 0.04
168 75 105 68 90 15.5 117 297 7878 1710 25.6 155.5 6.4 0.9
7.64 2.76 4.65 2.99 4.33 0.81 5.10 13.77 890 23898 78.8 0.046 0.27 0.04
194 70 118 76 110 20.6 130 350 10090 2700 35.8 333.9 6.9 0.9
8.43 4.33 5.35 3.50 1140 32528 0.098 0.31 0.07
214 110 136 89 15932 3675 569.4 8.0 1.7
1800 0.167 0.07
21685 1.8
2450

Hub = Steel Max 'D' is for bores with standard keyways
Spacer = Steel Weight and Moment of Inertia - Assuming maximum bores
Disc Pack = Stainless Steel
Hardware = Steel **

XGD Coupling — 4 BOLT
with Shrink Disc® connection

**

Fig. 14

COUPLING A SHRINK D D3 D5 LF S1 S3 LO NOMINAL MAXIMUM MAXIMUM WEIGHT MOMENT AXIAL ANGULAR RADIAL
SIZE DISC MAX TORQUE
(inches) SERIES (inches) (inches) (inches) (inches) (inches) (inches) CAPACITY TORQUE SPEED OF INERTIA MISALIGN. MISALIGN. MISALIGN.
XGD 10-4 (mm) (inches) (mm) (mm) (mm) (mm) (mm) (mm) (in-lbs)
XGD 20-4 Rfn 4071 (mm) CAPACITY UNBALANCED WR2 +/- Ka Kw KR
XGD 30-4 3.19 Max 1.77 1.14 1.97 0.27 (Nm)
XGD 40-4 81 1.25 45 29 50 6.9 (in-lbs) (lbs) (lb-in2) (inches) PER (inches)
XGD 50-4 3.66 36 32 1.97 1.26 2.17 0.32
XGD 60-4 93 1.42 50 32 55 8.1 (Nm) (rpm) (kg) (kg-m2) (mm) DISC PACK (mm)
XGD 70-4 4.09 44 36 2.40 1.58 2.17 0.34
XGD 80-4 104 1.89 61 40 55 8.6 2.25 6.19 797 1196 4500 5.6 6.35 0.11 1˚ 0.03
4.96 55 48 2.76 1.77 2.56 0.48 57 157 90 135 2.5 0.002 2.7 .9
126 2.05 70 45 65 12.2
5.63 62 52 3.19 1.97 2.76 0.50 2.75 7.09 1593 2390 4300 9.0 12.3 0.12 1˚ 0.04
143 2.76 81 50 70 12.7 70 180 180 270 4.1 0.004 3.0 1.0
6.61 80* 70 4.13 2.68 2.95 0.56
168 2.95 105 68 75 14.1 2.59 6.93 2213 3320 4200 12.1 25.1 0.15 1˚ 0.04
7.64 90* 75 4.65 2.99 3.54 0.61 66 176 250 375 5.5 0.007 3.7 1.0
194 3.35 118 76 90 15.5
8.43 90 85 5.35 3.50 4.33 0.81 3.31 8.43 5045 7568 4000 20.2 53.9 0.17 1˚ 0.05
214 3.74 136 89 110 20.6 84 214 570 855 9.2 0.016 4.2 1.2
125 95
3.64 9.16 7878 11817 3800 33.6 129.3 0.19 1˚ 0.05
92 233 890 1335 15.3 0.038 4.9 1.2

3.83 9.68 10090 15135 3600 41.8 233.6 0.25 1˚ 0.06
97 246 1140 1710 19.0 0.068 6.4 1.4

4.61 11.69 15932 23898 3000 70.7 394.8 0.27 1˚ 0.07
117 297 1800 2700 32.1 0.115 6.9 1.7

5.10 13.77 21685 32528 3000 105.4 978.3 0.31 1˚ 0.07
130 350 2450 3675 47.9 0.286 8.0 1.8

Hub = Steel Max 'D' is for bores with Shrink Disc® Connection
Spacer = Steel Weight and Moment of Inertia - Assuming maximum bores and Shrink Disc®
Disc Pack = Stainless Steel * Shrink Disc® bolts hang over hub end
Hardware = Steel ** For Dimensions 'D1' and 'H' please see page 7

12 RINGFEDER CORPORATION

SPECIFICATIONS

HS Coupling — 6 BOLT

Fig. 15

COUPLING A D D3 LF S1 LO NOMINAL MAXIMUM MAXIMUM WEIGHT MOMENT AXIAL ANGULAR
SIZE TORQUE TORQUE SPEED
MAX (inches) (inches) (inches) (inches) CAPACITY CAPACITY UNBALANCED (lbs) OF INERTIA MISALIGN. MISALIGN.
(in-lbs) (in-lbs) (kg)
(inches) (mm) (mm) (mm) (mm) (rpm) WR2 +/- Ka Kw
(Nm) (Nm) (lb-in2) (inches)
(inches) (mm) 2.56 1.97 0.33 4.27
65 50 8.40 108.4 (kg-m2) (mm)
(mm) 1.81 3.31 2.36 0.33 5.06
HS 110-6 46 84 60 8.40 128.4 5090 10180 7200 5.1 10.3 0.04 1.5˚
HS 132-6 4.33 2.36 3.86 2.76 0.44 5.95 575 1150 5840 2.3 0.003 1.0
HS 158-6 110 60 98 70 11.2 151.2 9740 19470 4920 8.4 23.9 0.05 1.5˚
HS 185-6 5.20 2.76 4.41 3.15 0.55 6.85 1100 2200 4200 3.8 0.007 1.3
HS 202-6 132 70 112 80 14 174 17700 35400 3840 14.1 58.1 0.06 1.5˚
HS 228-6 6.22 3.15 4.92 3.54 0.61 7.70 2000 4000 3400 6.4 0.017 1.5
HS 255-6 158 80 125 90 15.5 195.5 29210 58410 3080 21.8 126.4 0.07 1.5˚
HS 278-6 7.28 3.54 5.51 3.94 0.69 8.56 3300 6600 2800 9.9 0.037 1.8
HS 302-6 185 90 140 100 17.5 217.5 40710 81430 2560 29.7 208.4 0.07 1˚
HS 325-6 7.95 3.94 6.10 4.53 0.81 9.87 4600 9200 2400 13.5 0.06 1.9
HS 345-6 202 100 155 115 20.5 250.5 61960 123910 2200 41.8 375.9 0.08 1˚
HS 380-6 8.98 4.33 6.85 4.92 0.83 10.68 7000 14000 2040 19.0 0.11 2.1
HS 410-6 228 110 174 125 21.2 271.2 90280 180550 1880 63.8 718 0.09 1˚
HS 440-6 10.04 4.88 7.48 5.31 0.96 11.59 10200 20400 1740 29.0 0.21 2.4
HS 475-6 255 124 190 135 24.4 294.4 125680 251360 1680 81.4 1093 0.10 1˚
HS 505-6 10.94 5.31 8.07 5.71 1.02 12.44 14200 28400 1520 37.0 0.32 2.6
278 135 205 145 26.0 316.0 177010 354030 107.8 1708 0.11 1˚
11.89 5.71 8.54 6.10 1.11 13.31 20000 40000 49.0 0.50 2.8
302 145 217 155 28.2 338.2 221270 442540 133.1 2426 0.13 1˚
12.80 6.10 9.37 6.69 1.26 14.65 25000 50000 60.5 0.71 3.2
325 155 238 170 32.0 372.0 274370 548740 160.6 3349 0.13 1˚
13.58 6.69 10.04 7.28 1.31 15.87 31000 62000 73.0 0.98 3.4
345 170 255 185 33.2 403.2 374390 748770 211.2 5365 0.15 1˚
14.96 7.09 10.75 7.68 1.43 16.79 42300 84600 96.0 1.57 3.8
380 180 273 195 36.4 426.4 505380 1010800 275.0 7961 0.16 1˚
16.14 7.68 11.61 8.27 1.50 18.04 57100 114200 125.0 2.33 4.1
410 195 295 210 38.2 458.2 650350 1301100 332.2 11344 0.17 1˚
17.32 8.27 12.20 9.06 1.65 19.76 73500 147000 151.0 3.32 4.4
440 210 310 230 42.0 502.0 814270 1628500 420.2 16709 0.19 1˚
18.70 8.66 92000 184000 191.0 4.89 4.7
475 220 1035500 2071100 512.6 22859 0.20 1˚
19.88 117000 234000 233.0 6.69 5.0
505

Hub = Steel Max 'D' is for bores with standard keyways
Disc Pack = Stainless Steel Weight and Moment of Inertia - Assuming maximum bores
Hardware = Steel

RINGFEDER CORPORATION 13

SPECIFICATIONS

XHS Coupling — 6 BOLT

with Shrink Disc® connection

*

*

Fig. 16

COUPLING A SHRINK D D3 LF S1 LO NOMINAL MAXIMUM MAXIMUM WEIGHT MOMENT AXIAL ANGULAR
SIZE DISC TORQUE TORQUE SPEED MISALIGN.
(inches) SERIES MAX (inches) (inches) (inches) (inches) CAPACITY CAPACITY UNBALANCED (lbs) OF INERTIA MISALIGN.
XHS 110-6 (mm) (in-lbs) (in-lbs) (kg) WR2 Kw
XHS 132-6 (mm) Rfn 4071 (inches) (mm) (mm) (mm) (lb-in2) +/- Ka
XHS 158-6 MAX (Nm) (Nm) (rpm) (inches) 1.5˚
XHS 185-6 4.33 (mm) 2.56 1.97 0.33 (kg-m2) 1.5˚
XHS 202-6 110 55 65 50 8.40 4.27 5090 10180 7200 8.5 (mm) 1.5˚
XHS 228-6 5.20 80 1.89 3.31 2.36 0.33 108.4 575 1150 5840 3.9 20.8 1.5˚
XHS 255-6 132 90 48 84 60 8.40 5.06 9740 19470 4920 13.9 0.006 0.04 1˚
XHS 278-6 6.22 100 2.76 3.86 2.76 0.44 128.4 1100 2200 4200 6.3 77.8 1.0 1˚
XHS 302-6 158 110 70 98 70 11.2 5.95 17700 35400 3840 25.5 0.023 0.05 1˚
XHS 325-6 7.28 125 2.95 4.41 3.15 0.55 151.2 2000 4000 3400 11.6 140.3 1.3 1˚
XHS 345-6 185 140 75 112 80 14 6.85 29210 58410 3080 39.2 0.041 0.06 1˚
XHS 380-6 7.95 155 3.15 4.92 3.54 0.61 174 3300 6600 2800 17.8 258.0 1.5 1˚
XHS 410-6 202 175 80 125 90 15.5 7.70 40710 81430 2560 52.3 0.076 0.07 1˚
XHS 440-6 8.98 185 3.35 5.51 3.94 0.69 195.5 4600 9200 2400 23.8 301.2 1.8 1˚
XHS 475-6 228 200 85 140 100 17.5 8.56 61960 123910 2200 74.5 0.088 0.07 1˚
XHS 505-6 10.04 220 3.74 6.10 4.53 0.81 217.5 7000 14000 2040 33.9 816.3 1.9 1˚
255 240 95 155 115 20.5 9.87 90280 180550 1880 103.0 0.239 0.08 1˚
10.94 260 4.13 6.85 4.92 0.83 250.5 10200 20400 1740 46.8 1325 2.1 1˚
278 280 105 174 125 21.2 10.68 125680 251360 1680 142.5 0.388 0.09
11.89 300 4.53 7.48 5.31 0.96 271.2 14200 28400 1520 64.8 2283 2.4
302 115 190 135 24.4 11.59 177010 354030 192.8 0.668 0.10
12.80 5.31 8.07 5.71 1.02 294.4 20000 40000 87.6 3885 2.6
325 135 205 145 26.0 12.44 221270 442540 276.0 1.137 0.11
13.58 5.71 8.54 6.10 1.11 316.0 25000 50000 125.4 6391 2.8
345 145 217 155 28.2 13.31 274370 548740 316.3 1.871 0.13
14.96 6.30 9.37 6.69 1.26 338.2 31000 62000 143.8 8329 3.2
380 160 238 170 32.0 14.65 374390 748770 423.7 2.438 0.13
16.14 6.69 10.04 7.28 1.31 372 42300 84600 192.6 12952 3.4
410 170 255 185 33.2 15.87 505380 1010800 527.3 3.791 0.15
17.32 7.48 10.75 7.68 1.43 403.2 57100 114200 239.7 19262 3.8
440 190 273 195 36.4 16.79 650530 1301100 636.4 5.637 0.16
18.70 8.27 11.61 8.27 1.50 426.4 73500 147000 289.3 26955 4.1
475 210 295 210 38.2 18.04 814270 1628500 785.3 7.889 0.17
19.88 9.06 12.20 9.06 1.65 458.2 92000 184000 357.0 39022 4.4
505 230 310 230 42.0 19.76 1035500 2071100 934.3 11.420 0.19
9.65 502.0 117000 234000 424.7 49753 4.7
245 14.560 0.20
5.0

Hub = Steel Max 'D' is for bores with Shrink Disc® Connection
Disc Pack = Stainless Steel Weight and Moment of Inertia - Assuming maximum bores and Shrink Disc®
Hardware = Steel

* For Dimensions 'D1' and 'H' please see page 7

14 RINGFEDER CORPORATION

SPECIFICATIONS

HS Coupling — 8 BOLT

Fig. 17

COUPLING A D D3 LF S1 LO NOMINAL MAXIMUM MAXIMUM WEIGHT MOMENT AXIAL ANGULAR
SIZE TORQUE MISALIGN. MISALIGN.
MAX (inches) (inches) (inches) (inches) CAPACITY TORQUE SPEED (lbs) OF INERTIA
(in-lbs) (kg) WR2 +/- Ka Kw
(inches) (mm) (mm) (mm) (mm) CAPACITY UNBALANCED (inches)
(Nm) 85.8 (lb-in2)
(inches) (mm) 6.85 4.92 0.83 10.68 (in-lbs) 39 (kg-m2) (mm)
174 125 21.2 271.2 112.2
(mm) 4.88 7.48 5.31 0.96 11.59 (Nm) (rpm) 51
124 190 135 24.4 294.4 138.6
HS 278-8 10.94 5.31 8.07 5.71 1.02 12.44 177000 354000 2800 63 1189.1 0.07 0.5˚
HS 302-8 2.78 135 205 145 26.0 316.0 20000 40000 2560 165.0 0.348 1.8 0.5˚
HS 325-8 11.89 5.71 8.54 6.10 1.11 13.31 266000 531000 2400 75 1845.1 0.08 0.5˚
HS 345-8 302 145 217 155 28.2 338.2 30000 60000 2200 222.2 0.540 2 0.5˚
HS 380-8 12.80 6.10 9.37 6.69 1.26 14.65 327000 655000 2040 101 2583.2 0.08 0.5˚
HS 410-8 325 155 238 170 32.0 372.0 37000 74000 1880 286.0 0.756 2.1 0.5˚
HS 440-8 13.58 6.69 10.05 7.28 1.31 15.87 407000 814000 1740 130 3519.4 0.09 0.5˚
HS 475-8 345 170 255 185 33.2 403.2 46000 92000 1680 347.6 1.03 2.3 0.5˚
HS 505-8 14.96 7.09 10.75 7.68 1.43 16.79 558000 1115000 1520 158 5740.4 0.10 0.5˚
HS 540-8 380 180 273 195 36.4 426.4 63000 126000 1440 440.0 1.68 2.5 0.5˚
HS 570-8 16.14 7.68 11.61 8.27 1.50 18.04 761000 1522000 1360 200 8576.4 0.11 0.5˚
HS 605-8 410 195 295 210 38.2 458.2 86000 172000 1280 2.51 2.7 0.5˚
HS 635-8 17.32 8.27 12.20 9.06 1.65 19.76 974000 1947000 1240 12267 0.11 0.5˚
HS 675-8 440 210 310 230 42.0 502.0 110000 220000 1160 3.59 2.9 0.5˚
HS 700-8 18.70 8.66 12.99 9.45 1.81 20.71 1221000 2443000 1120 17939 0.12 0.5˚
HS 730-8 475 220 330 240 46.0 526.0 138000 276000 1080 5.25 3.1 0.5˚
HS 760-8 19.88 9.25 13.78 9.84 2.03 21.72 1549000 3098000 1040 0.13 0.5˚
505 235 350 250 51.6 551.6 175000 350000 WEIGHTS AND INERTIAS 3.3
21.26 9.84 14.57 10.43 2.09 22.96 1947000 3894000 AVAILABLE UPON REQUEST 0.14
540 250 370 265 53.2 583.2 220000 440000 3.6
22.44 10.43 15.16 11.02 2.39 24.44 2292000 4585000 0.15
570 265 385 280 60.8 620.8 259000 518000 3.48
23.82 10.83 16.14 11.81 2.57 26.19 2788000 5576000 0.15
605 275 410 300 65.2 665.2 315000 630000 3.9
25.00 11.42 16.54 12.40 2.71 27.51 3390000 6780000 0.16
635 290 420 315 68.8 698.8 383000 766000 4.1
26.57 11.81 17.32 12.99 2.80 28.79 4018000 8036000 0.17
675 300 440 330 71.2 731.2 454000 908000 4.2
27.56 12.40 18.11 13.78 2.87 30.43 4673000 9346000 0.17
700 315 460 350 72.8 772.8 528000 1056000 4.4
28.74 12.99 5381000 10762000 0.18
730 330 608000 1216000 4.6
29.92 6196000 12391000 0.19
760 700000 1400000 4.8

Hub = Steel Max 'D' is for bores with standard keyways
Disc Pack = Stainless Steel Weight and Moment of Inertia - Assuming maximum bores
Hardware = Steel

RINGFEDER CORPORATION 15

SPECIFICATIONS

XHS Coupling — 8 BOLT

with Shrink Disc® connection

*

*

Fig. 18

COUPLING A SHRINK D D3 LF S1 LO NOMINAL MAXIMUM MAXIMUM WEIGHT MOMENT AXIAL ANGULAR
SIZE DISC TORQUE TORQUE SPEED MISALIGN.
SERIES MAX (inches) (inches) (inches) (inches) CAPACITY CAPACITY UNBALANCED (lbs) OF INERTIA MISALIGN.
(inches) (mm) (in-lbs) (in-lbs) (kg) WR2 Kw
Rfn 4071 (inches) (mm) (mm) (mm) (lb-in2) +/- Ka
(mm) MAX (Nm) (Nm) (rpm) 146.9 (inches) 0.5˚
(mm) 6.85 4.92 0.83 67 (kg-m2) 0.5˚
XHS 278-8 10.94 155 174 125 21.2 10.68 177000 354000 2800 (mm) 0.5˚
XHS 302-8 278 175 4.53 7.48 5.31 0.96 271.2 20000 40000 197.1 2379.1 0.5˚
XHS 325-8 11.89 185 115 190 135 24.40 90 0.696 0.07 0.5˚
XHS 345-8 302 200 5.31 8.07 5.71 1.02 11.59 266000 531000 2560 4020.7 1.8 0.5˚
XHS 380-8 12.80 220 135 205 145 26.0 294.4 30000 60000 281.5 1.177 0.08 0.5˚
XHS 410-8 325 240 5.71 8.54 6.10 1.11 128 6548.6 2 0.5˚
XHS 440-8 13.58 260 145 217 155 28.2 12.44 327000 655000 2400 320.7 1.917 0.08 0.5˚
XHS 475-8 345 280 6.30 9.37 6.69 1.26 316.0 37000 74000 146 8499.6 2.1 0.5˚
XHS 505-8 14.96 300 160 238 170 32.0 434.6 2.49 0.09 0.5˚
XHS 540-8 380 320 6.69 10.04 7.28 1.31 13.31 407000 814000 2200 198 13328 2.3 0.5˚
XHS 570-8 16.14 340 170 255 185 33.2 338.2 46000 92000 538.3 3.90 0.10 0.5˚
XHS 605-8 410 360 7.48 10.75 7.68 1.43 245 19876 2.5 0.5˚
XHS 635-8 17.32 360 190 273 195 36.4 14.65 558000 1115000 2040 651.8 5.82 0.11 0.5˚
XHS 675-8 440 400 8.27 11.61 8.27 1.50 372.0 63000 126000 296 27877 2.7 0.5˚
XHS 700-8 18.70 400 210 295 210 38.2 805.1 8.16 0.11 0.5˚
XHS 730-8 475 420 9.06 12.20 9.06 1.65 15.87 761000 1522000 1880 366 40253 2.9
XHS 760-8 19.88 440 230 310 230 42.0 403.2 86000 172000 11.78 0.12
505 9.65 12.99 9.45 1.81 3.1
21.26 245 330 240 46.0 16.79 974000 1947000 1740 0.13
540 10.24 13.78 9.84 2.03 426.4 110000 220000 3.3
22.44 260 350 250 51.6 0.14
570 10.63 14.57 10.43 2.09 18.04 1221000 2443000 1680 3.6
23.82 270 370 265 53.2 458.2 138000 276000 0.15
605 11.61 15.16 11.02 2.39 3.8
25.00 295 385 280 60.8 19.76 1549000 3098000 1520 WEIGHTS AND INERTIAS 0.15
635 11.61 16.14 11.81 2.57 502.0 175000 350000 AVAILABLE UPON REQUEST 3.9
26.57 295 410 300 65.2 0.16
675 12.99 16.54 12.40 2.71 20.71 1947000 3894000 1440 4.1
27.56 330 420 315 68.8 526.0 220000 440000 0.17
700 12.99 17.32 12.99 2.80 4.2
28.74 330 440 330 71.2 21.72 2292000 4585000 1360 0.17
730 13.78 18.11 13.78 2.87 551.6 259000 518000 4.4
29.92 350 460 350 72.8 0.18
760 14.17 22.96 2788000 5576000 1280 4.6
360 583.2 315000 630000 0.19
4.8
24.44 3390000 6780000 1240
620.8 383000 766000

26.19 4018000 8036000 1160
665.2 454000 908000

27.51 4673000 9346000 1120
698.8 528000 1056000

28.79 538100010762000 1080
731.2 608000 1216000

30.43 619600012391000 1040
772.8 700000 1400000

Hub = Steel Max 'D' is for bores with Shrink Disc® Connection
Disc Pack = Stainless Steel Weight and Moment of Inertia - Assuming maximum bores and Shrink Disc®
Hardware = Steel

* For Dimensions 'D1' and 'H' please see page 7

16 RINGFEDER CORPORATION

SPECIFICATIONS

HD Coupling — 6 BOLT

Fig. 19

COUPLING A D D3 LF S1 S3 LO NOMINAL MAXIMUM MAXIMUM WEIGHT MOMENT AXIAL ANGULAR RADIAL
SIZE TORQUE TORQUE SPEED MISALIGN MISALIGN. MISALIGN.
(inches) MAX (inches) (inches) (inches) (inches) (inches) CAPACITY CAPACITY UNBALANCED (lbs) OF INERTIA
HD 110-6 (mm) (in-lbs) (in-lbs) WR2 +/- Ka Kw KR
HD 132-6 (mm) (inches) (mm) (mm) (mm) (mm) (kg) (lb-in2) (inches) PER (inches)
HD 158-6 (Nm) (Nm) (rpm) (mm) DISC PACK (mm)
HD 185-6 4.33 (mm) 2.56 1.97 0.33 3.46 6.4 (kg-m2)
HD 202-6 110 65 50 8.4 88 2.9
HD 228-6 5.20 1.81 3.31 2.36 0.33 4.25 7.40 5090 10180 7200 12 13.7 0.08 1.5˚ 0.08
HD 255-6 132 46 84 60 8.4 108 188 575 1150 5840 5.5 0.004 2.1 2.1
HD 278-6 6.22 2.36 3.86 2.76 0.44 4.88 8.98 9740 19470 4920 19
HD 302-6 158 60 98 70 11.2 124 228 1100 2200 4200 8.6 41.0 0.10 1.5˚ 0.11
HD 325-6 7.28 2.76 4.41 3.15 0.55 5.51 10.39 17700 35400 3840 33 0.012 2.6 2.8
HD 345-6 185 70 112 80 14 140 264 2000 4000 3400 15
HD 380-6 7.95 3.15 4.92 3.54 0.61 6.22 11.81 29210 58410 3080 46 85.4 0.12 1.5˚ 0.12
HD 410-6 202 80 125 90 15.5 158 300 3300 6600 2800 21 0.025 3.1 2.9
HD 440-6 8.98 3.54 5.51 3.94 0.69 6.85 13.31 40710 81430 2560 66
HD 475-6 228 90 140 100 17.5 174 338 4600 9200 2400 30 215.3 0.15 1.5˚ 0.13
HD 505-6 10.04 3.94 6.10 4.53 0.81 7.72 14.72 61960 123910 2200 88 0.063 3.7 3.3
255 100 155 115 20.5 196 374 7000 14000 2040 40
10.94 4.33 6.85 4.92 0.83 8.58 16.77 90280 180550 1880 125 375.9 0.15 1˚ 0.10
278 110 174 125 21.2 218 426 10200 20400 1740 57 0.11 3.8 2.4
11.89 4.88 7.48 5.31 0.96 9.21 18.43 125680 251360 1680 163
302 124 190 135 24.4 234 468 14200 28400 1520 74 683.4 0.17 1˚ 0.10
12.80 5.31 8.07 5.71 1.02 10.00 19.84 177010 354030 196 0.20 4.2 2.7
325 135 205 145 26.0 254 504 20000 40000 89
13.58 5.71 8.54 6.10 1.11 10.63 21.42 221270 442540 240 1093 0.19 1˚ 0.12
345 145 217 155 28.2 270 544 25000 50000 109 0.32 4.7 3.0
14.96 6.10 9.37 6.69 1.26 11.65 22.83 274370 548740 321
380 155 238 170 32.0 296 580 31000 62000 146 1913 0.20 1˚ 0.13
16.14 6.69 10.04 7.28 1.31 12.60 25.04 374390 748770 418 0.56 5.2 3.3
410 170 255 185 33.2 320 636 42300 84600 190
17.32 7.09 10.75 7.68 1.43 13.15 27.17 505380 1010800 493 2939 0.22 1˚ 0.14
440 180 273 195 36.4 334 690 57100 114200 224 0.86 5.7 3.6
18.70 7.68 11.61 8.27 1.50 14.09 28.50 650530 1301100 634
475 195 295 210 38.2 358 724 73500 147000 288 3998 0.26 1˚ 0.15
19.88 8.27 12.20 9.06 1.65 15.51 30.63 814270 1628500 805 1.17 6.5 3.9
505 210 310 230 42.0 394 778 92000 184000 366
8.66 33.62 1035500 2071100 5570 0.27 1˚ 0.16
220 854 117000 234000 1.63 6.9 4.1

9021 0.30 1˚ 0.18
2.64 7.6 4.5

13804 0.32 1˚ 0.19
4.04 8.2 4.9

18622 0.35 1˚ 0.20
5.45 8.8 5.1

28018 0.37 1˚ 0.21
8.20 9.5 5.4

40866 0.40 1˚ 0.24
11.96 10.1 6.0

Hub = Steel Max 'D' is for bores with standard keyways
Spacer = Steel Weight and Moment of Inertia - Assuming maximum bores
Disc Pack = Stainless Steel
Hardware = Steel

RINGFEDER CORPORATION 17

SPECIFICATIONS

XHD Coupling — 6 BOLT

with Shrink Disc® connection

*

*

Fig. 20

COUPLING A SHRINK D D3 LF S1 S3 LO NOMINAL MAXIMUM MAXIMUM WEIGHT MOMENT AXIAL ANGULAR RADIAL
SIZE DISC TORQUE TORQUE SPEED
(inches) SERIES MAX (inches) (inches) (inches) (inches) (inches) CAPACITY CAPACITY UNBALANCED (lbs) OF INERTIA MISALIGN MISALIGN. MISALIGN.
XHD 110-6 (mm) (in-lbs) (in-lbs)
XHD 132-6 (mm) Rfn 4071 (inches) (mm) (mm) (mm) (mm) (kg) WR2 +/- Ka Kw KR
XHD 158-6 MAX (Nm) (Nm) (rpm)
XHD 185-6 4.33 (mm) 2.56 1.97 0.33 3.46 9.8 (lb-in2) (inches) PER (inches)
XHD 202-6 110 55 65 50 8.4 88 4.5
XHD 228-6 5.20 80 1.89 3.31 2.36 0.33 4.25 18 (kg-m2) (mm) DISC PACK (mm)
XHD 255-6 132 90 48 84 60 8.4 108 8.0
XHD 278-6 6.22 100 2.76 3.86 2.76 0.44 4.88 7.40 5090 10180 7200 30 24.2 0.08 1.5˚ 0.08
XHD 302-6 158 110 70 98 70 11.2 124 188 575 1150 13.8 0.007 2.1 2.1
XHD 325-6 7.28 125 2.95 4.41 3.15 0.55 5.51 50
XHD 345-6 185 140 75 112 80 14 140 8.98 9740 19470 5840 22.9 94.9 0.10 1.5˚ 0.11
XHD 380-6 7.95 155 3.15 4.92 3.54 0.61 6.22 228 1100 2200 69 0.028 2.6 2.8
XHD 410-6 202 175 80 125 90 15.5 158 31.2
XHD 440-6 8.98 185 3.35 5.51 3.94 0.69 6.85 10.39 17700 35400 4920 99 167.6 0.12 1.5˚ 0.12
XHD 475-6 228 200 85 140 100 17.5 174 264 2000 4000 45.0 0.049 3.1 2.9
XHD 505-6 10.04 220 3.74 6.10 4.53 0.81 7.72 127
255 240 95 155 115 20.5 196 11.81 29210 58410 4200 57.7 346.9 0.15 1.5˚ 0.13
10.94 260 4.13 6.85 4.92 0.83 8.58 300 3300 6600 186 0.10 3.7 3.3
278 280 105 174 125 21.2 218 84.5
11.89 300 4.53 7.48 5.31 0.96 9.21 13.31 40710 81430 3840 248 468.7 0.15 1˚ 0.10
302 115 190 135 24.4 234 338 4600 9200 113 0.14 3.8 2.4
12.80 5.31 8.07 5.71 1.02 10.00 339
325 135 205 145 26.0 254 14.72 61960 123910 3400 154 1124.0 0.17 1˚ 0.10
13.58 5.71 8.54 6.10 1.11 10.63 374 7000 14000 296 0.33 4.2 2.7
345 145 217 155 28.2 270 135
14.96 6.30 9.37 6.69 1.26 11.65 16.77 90280 180550 3080 534 1701 0.19 1˚ 0.12
380 160 238 170 32.0 296 426 10200 20400 243 0.50 4.7 3.0
16.14 6.69 10.04 7.28 1.31 12.60 670
410 170 255 185 33.2 320 18.43 125680 251360 2800 305 3103 0.20 1˚ 0.13
17.32 7.48 10.75 7.68 1.43 13.15 468 14200 28400 797 0.91 5.2 3.3
440 190 273 195 36.4 334 362
18.70 8.27 11.61 8.27 1.50 14.09 19.84 177010 354030 2560 999 5115 0.22 1˚ 0.14
475 210 295 210 38.2 358 504 20000 40000 454 1.50 5.7 3.6
19.88 9.06 12.20 9.06 1.65 15.51 1227
505 230 310 230 42.0 394 21.42 221270 442540 2400 558 7963 0.26 1˚ 0.15
9.65 544 25000 50000 2.33 6.5 3.9
245
22.83 274370 548740 2200 10550 0.27 1˚ 0.16
580 31000 62000 3.09 6.9 4.1

25.04 374390 748770 2040 16609 0.30 1˚ 0.18
636 42300 84600 4.86 7.6 4.5

27.17 505380 1010800 1880 25104 0.32 1˚ 0.19
690 57100 114200 7.35 8.2 4.9

28.50 650530 1301100 1740 34232 0.35 1˚ 0.20
724 73500 147000 10.0 8.8 5.1

30.63 814270 1628500 1680 50332 0.37 1˚ 0.21
778 92000 184000 14.7 9.5 5.4

33.62 10355002071100 1520 67760 0.40 1˚ 0.24
854 117000 234000 1908 10.1 6.0

Hub = Steel Max 'D' is for bores with Shrink Disc® Connection
Spacer = Steel Weight and Moment of Inertia - Assuming maximum bores and Shrink Disc®
Disc Pack = Stainless Steel
Hardware = Steel * For Dimensions 'D1' and 'H' please see page 7

18 RINGFEDER CORPORATION

SPECIFICATIONS

HD Coupling — 8 BOLT

Fig. 21

COUPLING A D D3 LF S1 S3 LO NOMINAL MAXIMUM MAXIMUM WEIGHT MOMENT AXIAL ANGULAR RADIAL
SIZE TORQUE TORQUE SPEED MISALIGN MISALIGN. MISALIGN.
(inches) MAX (inches) (inches) (inches) (inches) (inches) CAPACITY CAPACITY UNBALANCED (lbs) OF INERTIA
HD 278-8 (mm) (in-lbs) (in-lbs) (kg) WR2 +/- Ka Kw KR
HD 302-8 (mm) (inches) (mm) (mm) (mm) (mm) (lb-in2) (inches) PER (inches)
HD 325-8 (Nm) (Nm) (rpm) (mm) DISC PACK (mm)
HD 345-8 10.94 (mm) 6.85 4.92 0.83 8.58 (kg-m2)
HD 380-8 278 174 125 21.2 218
HD 410-8 11.89 4.88 7.48 5.31 0.96 9.21 18.43 177000 354000 2800 129.8 1957.9 0.15 0.5˚ 0.07
HD 440-8 302 124 190 135 24.4 234 468 20000 40000 59.0 0.573 3.7 1.7
HD 475-8 12.80 5.31 8.07 5.71 1.02 10.00
HD 505-8 325 135 205 145 26.0 254 19.84 266000 531000 2560 169 3000.0 0.16 0.5˚ 0.07
HD 540-8 13.58 5.71 8.54 6.10 1.11 10.63 504 30000 60000 77.0 0.878 4 1.8
HD 570-8 345 145 217 155 28.2 270
HD 605-8 14.96 6.10 9.37 6.69 1.26 11.65 21.42 327000 655000 2400 202 4096.8 0.17 0.5˚ 0.08
HD 635-8 380 155 238 170 32.0 296 544 37000 74000 92.0 1.199 4.3 2.0
HD 675-8 16.14 6.69 10.04 7.28 1.31 12.60
HD 700-8 410 170 255 185 33.2 320 22.83 407000 814000 2200 246 5672.0 0.18 0.5˚ 0.08
HD 730-8 17.32 7.09 10.75 7.68 1.43 13.15 580 46000 92000 112 1.660 4.6 2.1
HD 760-8 440 180 273 195 36.4 334
18.70 7.68 11.61 8.27 1.50 14.09 25.04 558000 1115000 2040 330 9276.8 0.20 0.5˚ 0.09
475 195 295 210 38.2 358 636 63000 126000 150 2.72 5 2.3
19.88 8.27 12.20 9.06 1.65 15.51
505 210 310 230 42.0 394 27.17 761000 1522000 1880 429 14043.4 0.21 0.5˚ 0.10
21.26 8.66 12.99 9.45 1.81 16.38 690 86000 172000 195 4.11 5.4 2.5
540 220 330 240 46.0 416
22.44 9.25 13.78 9.84 2.03 17.72 28.50 974000 1947000 1740 506 18930 0.23 0.5˚ 0.10
570 235 350 250 51.6 450 724 110000 220000 230 5.54 5.8 2.6
23.82 9.84 14.57 10.43 2.09 18.66
605 250 370 265 53.2 474 30.63 1221000 2443000 1680 649 28428 0.25 0.5˚ 0.11
25.00 10.43 15.16 11.02 2.39 20.51 778 138000 276000 295 8.32 6.3 2.8
635 265 385 280 60.8 521
26.57 10.83 16.14 11.81 2.57 21.97 33.62 1549000 3098000 1520 823 41447 0.26 0.5˚ 0.12
675 275 410 300 65.2 558 854 175000 350000 374 12.13 6.7 3.1
27.56 11.42 16.54 12.40 2.71 23.43
700 290 420 315 68.8 595 35.28 1947000 3894000 1440 999 57301 0.28 0.5˚ 0.13
28.74 11.81 17.32 12.99 2.80 24.02 896 220000 440000 454 16.77 7.2 3.2
730 300 440 330 71.2 610
29.92 12.40 18.11 13.78 2.87 25.28 37.40 2292000 4585000 1360 1177 75240 0.30 0.5˚ 0.14
760 315 460 350 72.8 642 950 259000 518000 535 22.02 7.6 3.5
12.99
330 39.53 2788000 5576000 1280 1357 95673 0.31 0.5˚ 0.14
1004 315000 630000 617 28.00 7.8 3.7

42.56 3390000 6780000 1240 1602 125194 0.32 0.5˚ 0.16
1081 383000 766000 728 36.64 8.2 4.0

45.59 4018000 8036000 1160 1925 166129 0.33 0.5˚ 0.17
1158 454000 908000 875 48.62 8.4 4.3

48.23 4673000 9346000 1120 2246 212735 0.35 0.5˚ 0.18
1225 528000 1056000 1021 62.26 8.9 4.6

50.00 5381000 10762000 1080 2486 255822 0.36 0.5˚ 0.19
1270 608000 1216000 1130 74.87 9.2 4.7

52.83 6196000 12391000 1040 2882 324159 0.38 0.5˚ 0.20
1342 700000 1400000 1310 94.87 9.6 5.0

Hub = Steel Max 'D' is for bores with standard keyways
Spacer = Steel Weight and Moment of Inertia - Assuming maximum bores
Disc Pack = Stainless Steel
Hardware = Steel

RINGFEDER CORPORATION 19

SPECIFICATIONS

XHD Coupling — 8 BOLT

with Shrink Disc® connection

*

*

Fig. 22

COUPLING A SHRINK D D3 LF S1 S3 LO NOMINAL MAXIMUM MAXIMUM WEIGHT MOMENT AXIAL ANGULAR RADIAL
SIZE DISC TORQUE TORQUE SPEED
SERIES MAX (inches) (inches) (inches) (inches) (inches) CAPACITY CAPACITY UNBALANCED (lbs) OF INERTIA MISALIGN. MISALIGN. MISALIGN.
(mm) (in-lbs) (in-lbs)
Rfn 4071 (inches) (mm) (mm) (mm) (mm) (kg) WR2 +/- Ka Kw KR
MAX (Nm) (Nm) (rpm)
(inches) (mm) 6.85 4.92 0.83 8.58 190.9 (lb-in2) (inches) PER (inches)
(mm) 155 174 125 21.2 218 87
175 4.53 7.48 5.31 0.96 9.21 (kg-m2) (mm) DISC PACK (mm)
185 115 190 135 24.4 234 253.9
XHD 278-8 10.94 200 5.31 8.07 5.71 1.02 10.00 18.43 177000 354000 2800 115 3147.9 0.15 0.5˚ 0.07
278 220 135 205 145 26.0 254 468 20000 40000 344.9 0.921 3.7 1.7
240 5.71 8.54 6.10 1.11 10.63 157
XHD 302-8 11.89 260 145 217 155 28.2 270 19.84 266000 531000 2560 410.7 5175.6 0.16 0.5˚ 0.07
302 280 6.30 9.37 6.69 1.26 11.65 504 30000 60000 187 1.515 4 1.8
300 160 238 170 32.0 296 542.4
XHD 325-8 12.80 320 6.69 10.04 7.28 1.31 12.60 21.42 327000 655000 2400 247 8062.2 0.17 0.5˚ 0.08
325 340 170 255 185 33.2 320 544 37000 74000 681.3 2.360 4.3 2.0
360 7.48 10.75 7.68 1.43 13.15 310
XHD 345-8 13.58 360 190 273 195 36.4 334 22.83 407000 814000 2200 810.2 10652.2 0.18 0.5˚ 0.08
345 400 8.27 11.61 8.27 1.50 14.09 580 46000 92000 368 3.120 4.6 2.1
400 210 295 210 38.2 358 1014
XHD 380-8 14.96 420 9.06 12.20 9.06 1.65 15.51 25.04 558000 1115000 2040 461 16865 0.20 0.5˚ 0.09
380 440 230 310 230 42.0 394 636 63000 126000 1245 4.94 5 2.3
9.65 12.99 9.45 1.81 16.38 566
XHD 410-8 16.14 245 330 240 46.0 416 27.17 761000 1522000 1880 1468 25343 0.21 0.5˚ 0.10
410 10.24 13.78 9.84 2.03 17.72 690 86000 172000 667 7.42 5.4 2.5
260 350 250 51.6 450 1895
XHD 440-8 17.32 10.63 14.57 10.43 2.09 18.66 28.50 974000 1947000 1740 861 34540 0.23 0.5˚ 0.10
440 270 370 265 53.2 474 724 110000 220000 2101 10.11 5.8 2.6
11.61 15.16 11.02 2.39 20.51 955
XHD 475-8 18.70 295 385 280 60.8 521 30.63 1221000 2443000 1680 2327 50742 0.25 0.5˚ 0.11
475 11.61 16.14 11.81 2.57 21.97 778 138000 276000 1058 14.85 6.3 2.8
295 410 300 65.2 558 2918
XHD 505-8 19.88 12.99 16.54 12.40 2.71 23.43 33.62 1549000 3098000 1520 1326 70738 0.26 0.5˚ 0.12
505 330 420 315 68.8 595 854 175000 350000 3237 20.70 6.7 3.1
12.99 17.32 12.99 2.80 24.02 1471
XHD 540-8 21.26 330 440 330 71.2 610 35.28 1947000 3894000 1440 3576 96368 0.28 0.5˚ 0.13
540 13.78 18.11 13.78 2.87 25.28 896 220000 440000 1625 28.20 7.2 3.2
350 460 350 72.8 642 4378
XHD 570-8 22.44 14.17 37.40 2292000 4585000 1360 1990 140700 0.30 0.5˚ 0.14
570 360 950 259000 518000 41.18 7.6 3.5

XHD 605-8 23.82 39.53 2788000 5576000 1280 170303 0.31 0.5˚ 0.14
605 1004 315000 630000 49.84 7.8 3.7

XHD 635-8 25.00 42.56 3390000 6780000 1240 197825 0.32 0.5˚ 0.16
635 1081 383000 766000 57.90 8.2 4.0

XHD 675-8 26.57 45.59 4018000 8036000 1160 306346 0.33 0.5˚ 0.17
675 1158 454000 908000 89.66 8.4 4.3

XHD 700-8 27.56 48.23 4673000 9346000 1120 351466 0.35 0.5˚ 0.18
700 1225 528000 1056000 102.86 8.9 4.6

XHD 730-8 28.74 50.00 5381000 10762000 1080 416996 0.36 0.5˚ 0.19
730 1270 608000 1216000 122.04 9.2 4.7

XHD 760-8 29.92 52.83 6196000 12391000 1040 573660 0.38 0.5˚ 0.20
760 1342 700000 1400000 167.89 9.6 5.0

Hub = Steel Max 'D' is for bores with Shrink Disc® Connection
Spacer = Steel Weight and Moment of Inertia - Assuming maximum bores and Shrink Disc®
Disc Pack = Stainless Steel
Hardware = Steel * For Dimensions 'D1' and 'H' please see page 7

20 RINGFEDER CORPORATION

RING-flex® Coupling Table 2 – Shrink Disc® Bolt Information, Low Inertia Series
Installation Instructions
SHRINK MA SOCKET
TOOLS REQUIRED: DISC (in-lbs) SIZE
• Torque Wrench and Sockets for Shrink Disc® SIZE (mm)
(Nm)
and Coupling Hex Bolts (see Tables 2 ,3 and 4) 10 7
• Open end wrench for Coupling Hex Bolts 13 12 8
• Straight Edge and/or Dial Indicator 16 1.4 8
• Feeler Gauges 24 25 8
30 2.8 8
THESE INSTRUCTIONS ARE FOR THE STAN- 36 25 10
DARD SERIES COUPLINGS WITH NORMAL RUN- 44 2.8 10
NING CONDITIONS. SPECIAL COUPLING 50 30 10
DESIGNS MAY HAVE DIFFERENT INSTRUCTIONS. 3.4
30
It is recommended to disassemble the coupling for 3.4
easier installation. Note Figures 29-30 for the 75
correct arrangement of the bolts, washers, disc 8.5
pack, and nuts. 75
8.5
Attachment to the Shaft – Shrink Disc® 75
1. Inspect both driving and driven shafts making 8.5
sure they are clean and free from burrs. Lightly oil
shaft and hub bore. DO NOT USE MOLYKOTE Table 3 – Shrink Disc® Bolt Information
OR SIMILAR LUBRICANTS.
RfN MA SOCKET RfN MA SOCKET
2. Place first hub with Shrink Disc® on one shaft 4071 (ft-lbs) SIZE 4071 (ft-lbs) SIZE
and the second hub on the other shaft. Slide them SIZE (mm) SIZE (mm)
back so that both shaft ends are visible. (Nm) (Nm)

3. Move first hub to be flush with shaft end. 24 3 8 185 185 24
Gradually tighten all Shrink Disc® locking screws, 4 8 251 24
in several passes, to specified tightening torque 10 24
(MA); see Tables 2 and 3. Shrink Disc® is not fully 3 10 185 24
installed until one pass is completed without any 30 4 10 195 251 30
bolts turning. Use Torque Wrench! For in-depth 10 30
instructions, see catalog W300. 36 9 10 200 185 30
12 10 251 30
4. Follow instructions for axial alignment and 13 30
then fit second hub to shaft as explained in Step 3. 9 13 185 30
44 12 13 220 251 30
13 30
50 9 17 240 362 36
12 17 491 36
19 36
9 19 362 36
55 12 24 260 491 36
24
62 9 362
12 280 491

68 9 300 362
12 491

22 362
75 30 320 491

80 22 340 362
30 491

22 362
90 30 350 491

100 22 360 362
30 491

44 620
110 60 380 841

125 44 390 620
60 841

74 620
140 100 400 841

155 74 620
100 420 841

165 185 440 620
251 841

185
175 251

RINGFEDER CORPORATION 21

Installation Instructions, cont.

Attachment to the Shaft – Bore and Keyway Fig. 23 Single Flexing
1. Inspect shaft and hub bores and keyways to
make sure that they are clean and free of burrs. Fig. 24 Double Flexing
Lightly oiling the shaft will also make it easier
to assemble. * X is valid with the Shrink Disc® Shaft/Hub
Connection only.
2. Place first hub on one shaft and second hub
on the second shaft. Slide them until shaft ends Flexing), X, and Tolerance for standard cou-
are visible. plings. See Figures 23, 24 and Table 4.
4. Proceed with locking second hub to the shaft
3. Hubs are supplied standard with a slight by following the pertinent “Attachment to the
clearance fit. Interference fits would be recom- Shaft” instructions.
mended for bores larger than 3”. For more infor- Angular Alignment
mation, please contact Ringfeder. 1. With a dial indicator measure the angular
misalignment by determining the parallelism of
4. Move hubs to be flush with end of the shaft. the coupling flange faces.
Hubs will last longest when the key is engaged 2. Dimension (U) as shown in Figure 25 should
for the full length of the hub. be measured in at least three points, equally
spaced, to determine maximum value for (U). This
5. Fit key into hub and turn set screw until top must not exceed the max. allowable dimension
of key is contacted in the hub. stated in Table 4.
3. Adjust or shim equipment to bring indicator
6. Follow instructions for axial alignment and reading within max. allowable angular misalign-
then secure second hub to shaft as explained in ment (U).
Steps 4 and 5.

MACHINERY ALIGNMENT

The life of the coupling is directly affected by the
alignment accuracy between the two coupling
halves. Careful initial alignment will permit the
coupling to operate at full capacity and allow for
some future operational misalignments (i.e.
equipment settling).

For this reason, the maximum misalignment val-
ues given in the next tables are 30% of the max-
imum values for the coupling. Keeping all three
directions of misalignment within these limits will
increase the coupling life.

Axial Alignment
1. Bring equipment into the best visual align-
ment possible. Position the hubs axially so that
the distance between shaft ends is within min.
and max. dimensions S1 (Single Flexing) and S3
(Double Flexing) for standard couplings. See
Figures 23, 24 and Table 4. For non-standard
couplings, check corresponding coupling drawing.

2. Now locate first hub so that the shaft end is
flush with the hub face and lock into place.
Please see pertinent “Attachment to the Shaft”
instructions.

3. Move second hub into position axially using
the S1 (Single Flexing) or S3 (Double

Fig. 25

22 RINGFEDER CORPORATION

Installation Instructions, cont. 3. It is a good practice to check the coupling
alignment one last time after completing the
Parallel (Radial) Alignment assembly. This can be achieved by measuring the
1. Initial parallel alignment can be checked by disc pack gap in 2 locations 180 degrees apart to
using a straight-edge across the hub flanges (per find (2) lengths. The difference in these two mea-
Fig. 26) to measure the approx. distance (r) as surements should not exceed (U); see Table 4.
shown in Table 4 and Fig. 26.
This completes the coupling installation.
A more precise method is using the dial indicator
whereby the parallel off-set is measured in at least CAUTION: All rotating eqiupment is potentially
two places 90 degrees apart while rotating one dangerous and must be properly guarded. It is
hub. This is shown in Fig. 27. the user’s responsibility to check for all applica-
ble safety codes and provide suitable guards
2. Adjust or shim equipment to bring indicator and protection.
reading within max. allowable parallel misalignment
(r) per Table 4.

Fig. 26 Fig. 29 G Series Hardware Arrangement

Fig. 30 H Series Hardware Arrangement

Fig. 27

Installing Disc Pack and Sleeve
1. Once the hubs are aligned in the axial, angular
and parallel directions, install the disc pack and
sleeve. Figures 29 and 30 show the hardware ori-
entation for each coupling type.

PLEASE NOTE: It is very important on the Series
‘G’ couplings to position the washers with the
rounded face towards the disc pack.

2. At this point, the coupling bolts should be
torqued to specified torque value (T); see Table 4.
A torque wrench should be used to assure
proper bolt tightening.

PLEASE NOTE: With the Series ‘G’ coupling, it is
recommended to always turn the nut and hold the
bolt head.

RINGFEDER CORPORATION 23

Installation Instructions, cont.

Table 4

S1 S3 X +/- U r T Hex or S1 S3 X +/- U r T Hex or
(inches) (inches) (inches) (inches) (inches) (inches) (ft-lbs) Socket (inches) (inches) (inches) (inches) (inches) (inches) (ft-lbs) Socket

(mm) (mm) (mm) (mm) (mm) (mm) (Nm) Size (mm) (mm) (mm) (mm) (mm) (mm) (Nm) Size

Series G Axial Alignment Angular Parallel Bolt Series H Axial Alignment Angular Parallel Bolt
Information 8 Bolt Information
10-4
20-4 0.27 2.25 0.80 0.02 0.02 0.01 8 7/16" 278-8 0.83 8.58 2.00 0.03 0.03 0.02 332 30mm
30-4 6.9 57 20 0.5 0.4 0.2 11 302-8 21.2 218 51 0.8 0.7 0.5 450
40-4 325-8
50-4 0.32 2.75 1.00 0.03 0.02 0.01 17 1/2" 345-8 0.96 9.21 2.10 0.04 0.03 0.02 443 32mm
60-4 8.1 70 25 0.8 0.5 0.3 23 380-8 24.4 234 53 1.0 0.8 0.5 600
70-4 410-8
80-4 0.34 2.59 0.80 0.03 0.02 0.01 17 1/2" 440-8 1.02 10.00 1.90 0.04 0.03 0.02 443 32mm
8.6 66 20 0.8 0.5 0.3 23 475-8 26.0 254 48 1.0 0.9 0.6 600
505-8
0.48 3.31 1.20 0.04 0.03 0.02 40 5/8" 540-8 1.11 10.63 2.30 0.04 0.04 0.02 575 36mm
12.2 84 30 1.0 0.7 0.4 54 570-8 28.2 270 58 1.0 0.9 0.6 780
605-8
0.50 3.64 1.20 0.05 0.03 0.02 58 3/4" 635-8 1.26 11.65 2.20 0.05 0.04 0.03 811 41mm
12.7 92 30 1.3 0.7 0.4 79 675-8 32.0 296 56 1.3 1.0 0.7 1100
700-8
0.56 3.83 1.20 0.06 0.03 0.02 58 3/4" 730-8 1.31 12.60 2.40 0.05 0.04 0.03 1100 46mm
14.1 97 30 1.5 0.9 0.5 79 760-8 33.2 320 61 1.3 1.1 0.8 1500

0.60 4.59 1.30 0.07 0.04 0.02 115 15/16" 1.43 13.15 2.40 0.05 0.05 0.03 1475 –
15 117 33 1.8 1.0 0.5 156 36.4 334 61 1.3 1.2 0.8 2000

0.81 5.10 2.50 0.08 0.04 0.02 115 15/16" 1.50 14.09 2.40 0.06 0.05 0.03 1900 –
21 130 64 2.0 1.1 0.5 156 38.2 358 61 1.5 1.2 0.8 2600

1.65 15.51 2.90 0.06 0.05 0.04 2400 –
42.0 394 74 1.5 1.3 0.9 3300

S1 S3 X +/- U r T Hex or 1.81 16.38 3.30 0.07 0.06 0.04 3000 –
(inches) (inches) (inches) (inches) (inches) (inches) (ft-lbs) Socket 46.0 416 84 110 1.4 1.0 4100

(mm) (mm) (mm) (mm) (mm) (mm) (Nm) Size 2.03 17.72 3.10 0.07 0.06 0.04 3750
51.6 450 79 110 1.5 1.1 5100
Series H Bolt –
6 Bolt Information
Axial Alignment Angular Parallel 2.09 18.66 3.50 0.07 0.06 0.04 4575
110-6 53.2 474 89 110 1.6 1.1 6200
132-6 0.30 3.46 0.60 0.02 0.03 0.02 22 13mm –
158-6 7.6 88 15 0.5 0.9 0.6 30
185-6 2.39 20.51 4.10 0.08 0.07 0.05 5800
202-6 0.33 4.25 0.80 0.02 0.04 0.03 22 13mm 60.8 521 104 110 1.7 1.2 7900 –
228-6 8.40 108 20 0.5 1.0 0.8 30
255-6 2.57 21.97 4.60 0.08 0.07 0.05 7300
278-6 0.44 4.88 1.00 0.03 0.05 0.04 44 16mm 65.2 558 117 110 1.8 1.3 9900 –
302-6 11.2 124 25 0.8 1.2 0.9 60
325-6 2.71 23.43 5.20 0.08 0.07 0.05 9000
345-6 0.55 5.51 1.20 0.03 0.06 0.04 74 18mm 68.8 595 132 110 1.8 1.4 12200 –
380-6 14 140 30 0.8 1.5 1.0 100
410-6 2.80 24.02 5.00 0.09 0.08 0.06 9000
440-6 0.61 6.22 1.30 0.03 0.04 0.03 111 21mm 71.2 610 127 110 1.9 1.4 12200 –
475-6 15.5 158 33 0.8 1.1 0.8 150
505-6 2.87 25.28 5.20 0.09 0.08 0.06 10900
0.69 6.85 1.50 0.04 0.05 0.03 170 24mm 72.8 642 132 110 2.0 1.5 14800 –
17.5 174 38 1.0 1.2 0.8 230

0.77 7.72 1.80 0.04 0.05 0.04 332 30mm
19.5 196 46 1.0 1.3 0.9 450

0.83 8.58 2.00 0.05 0.06 0.04 332 30mm
21.2 218 51 1.3 1.5 1.0 450

0.96 9.21 2.10 0.05 0.06 0.04 443 32mm
24.4 234 53 1.3 1.6 1.1 600

1.02 10.00 1.90 0.06 0.07 0.05 443 32mm
26.0 254 48 1.5 1.7 1.1 600

1.11 10.63 2.30 0.06 0.07 0.05 575 36mm
28.2 270 58 1.5 1.8 1.2 780

1.26 11.65 2.20 0.08 0.08 0.05 811 41mm Table 5 – Standard Bore Tolerances
32.0 296 56 2.0 2.0 1.4 1100

1.31 12.60 2.40 0.08 0.08 0.06 1100 46mm Bore Diameter (inches) Tolerance (inches)
33.2 320 61 2.0 2.1 1.4 1500 over – to
+0.0006 / -0.0
1.43 13.15 2.40 0.08 0.09 0.06 1475 – 0.24 – 0.40 +0.0007 / -0.0
36.4 334 61 2.0 2.3 1.5 2000 0.40 – 0.71 +0.0008 / -0.0
0.71 – 1.19 +0.0010 / -0.0
1.50 14.09 2.40 0.09 0.10 0.06 1900 – 1.19 – 1.97 +0.0012 / -0.0
38.2 358 61 2.3 2.5 1.6 2600 1.97 – 3.15 +0.0014 / -0.0
3.15 – 4.73
1.65 15.51 2.90 0.10 0.10 0.07 2400 –
42.0 394 74 2.5 2.6 1.8 3300

24 RINGFEDER CORPORATION

TYPICAL COUPLING CONFIGURATIONS

Fig. 31 Double Flexing Fig. 32 Double flexing with larger hub for larger shaft
diameter.

Fig. 33 Double flexing mounted with Shrink Discs® for Fig. 34 Full-floating shaft coupling with tubular spacer.
absolutely backlash-free shaft-hub connection
and axial adjustment capability.

Fig. 35 Single Flexing Fig. 36 2-single flexing couplings with a solid interme-
diate shaft.

Fig. 37 Flange coupling for connection to engine fly- Fig. 38 Vertical installation requires a support for the
wheel or fluid couplings. weight of the spacer.

Fig. 39 Full-floating and semi-floating shaft couplings 25
with pillow blocks to bridge large spaces
between driving and driven equipment.

RINGFEDER CORPORATION

MORE COUPLING CONFIGURATIONS

Fig. 40 Double flexing coupling mounted with Half Fig. 41 Single flexing coupling mounted with one Shrink
Shrink Discs® Disc® and one internal Locking Assembly.

Fig. 42 Single flexing coupling fastened with two inter- Fig. 43 Double flexing coupling with extended spacer
nal Locking Assemblies mounted with two internal Locking Assemblies.

Fig. 44 Two single flexing couplings with Shrink Discs® for
accommodation of varying floating shaft lengths.

Fig. 45 Double flexing coupling fastened with a Shrink Fig. 46 Single flexing coupling fastened with Ringfeder
Disc® on one side and a key with a set screw Locking elements.
on the other.

Fig. 47 Double-double flexing coupling for test stand.

26 RINGFEDER CORPORATION

WE ALSO OFFER:

TRASCO® ES: backlash free couplings

The main design function of the TRASCO® ES coupling is to transmit
motion while absorbing misalignments and vibrations, with absolute preci-
sion and without any backlash whatsoever. The very compact design makes
it a very rational and functional device ideal in every positioning or feedback application.

Description Advantages
The TRASCO® ES consists of two hubs, made of high- • Backlash free torque transmission
strength aluminum (up to the 38/45 size) or steel (from • Vibration dampening
size 42) that are connected with an elastic element. • Low inertia
• Easy and time saving assembly
The hubs are made by accurate machining, in order to • Maintenance free
achieve accuracy, balance and optimal concentricity. • High speed performance
The spiders are made of a special polyurethane mix- • Electrical isolation
ture that was developed after considerable research In all positioning and feedback applications, smaller
and laboratory testing. They are press-formed by a TRASCO® ES couplings (up to size 19/24) successfully
process which guarantees a high degree of dimen- replace bellows, oldham, metallic beam and disc cou-
sional accuracy. plings. Larger TRASCO® ES couplings (from size
The spiders are available in different hardnesses: 92 24/28) successfully replace metal disc, rigid, steel gear
Sh. A (yellow), 98 Sh. A (red), 64 Sh. D (green), 80 and beam coupling in spindle drives, process line
Sh. A (blue). drives and other high torque drive applications.
Coupling performance depends on the type of spider
selected. Main applications
Other hardnesses are available on request to meet – Encoders
special operating conditions, such as higher tempera- – Steppers
tures, higher torques, and higher degree of vibration- – Pulse generators
damping capability. – Tachometers
– Medical equipment
Operation – Robotics
When the polyurethane element is installed in the pre- – Servos
cision machined hub it becomes precompressed, – Ball screws
thereby providing the zero backlash feature which – Machine tools spindles
characterizes the transmission performance of this – Process lines
coupling.
The coupling remains torsionally rigid (and backlash Operating Temperature Range
free) within the range of the pre-compression load, The recommended operating temperature range for
while permitting the absorption of radial, angular and the TRASCO® ES is between –40 and +90°C. Peak
axial misalignments as well as undesired vibrations. temperatures as high as 120°C can be tolerated.
The significantly wide pre-compressed area of the flex- Higher operating temperatures may cause the spider
ible element keeps the contact pressure low against to lose a considerable amount of elasticity, thus sub-
the elastic element. Therefore, the spider’s jaws, can stantially lowering the torque capacity.
be overloaded many times without losing original
properties.

RINGFEDER CORPORATION 27

RFC SPECIALTY PRODUCTS

RfC Specialty Locking Devices BALL DETENT TORQUE FRICTION TORQUE LIMITER
Ringfeder Corporation excels at
specialty keyless shaft/hub connec- LIMITERS Type BD Type FC
tion solutions. From 1/4" shafts to These accurate ball/roller and sock- Easily adjustable, these torque lim-
30" shafts, our engineers have the et torque limiters are easily iters rely on friction to transmit the
solution. adjustable for different torque set- set torque. When an overload
tings. In the event of an overload, occurs, these devices slip until the
personnel and equipment are pro- overload is removed or the machine
tected as these devices disconnect is reset. Available in various config-
mechanically and make contact with urations and combinations with
a limit switch that sounds an alarm couplings.
or otherwise shuts the drive down.
Available in various configurations
and combinations with couplings.

ARCUSAFLEX® Flywheel Couplings Multi Mont OCTA Flywheel
Couplings
Highly flexible, backlash-free, vulcanized
rubber disc couplings designed to couple Torsionally flexible, economical
the flywheel of an internal combustion flange couplings for connecting the
engine to the shaft of the driven machine. flywheel of a combustion engine to
Rubber disc element accepts relatively the input shaft of a driven machine.
high angular, axial and parallel misalign- Rubber elements dampen vibrations
ments. Flange dimensions according to and accommodate misalignments.
SAE J620 standards.

In accordance with our established policy to constantly improve our products, the specifications contained herein are subject to change without notice.

Since our Engineers cannot be aware of all applications and cannot control all the factors that may affect the function of our products, our warranty applies to
our products only.

TECHNICAL ASSISTANCE

Call us Toll Free at 1-800-638-1830

Please let us know what your specific requirements
are and we shall be very happy to work out detailed recom-
mendations without any obligation. Just send a sketch with
your requirements and specifications.

Call or write for more information
Visit our website: www.mdmetric.com

RINGFEDER Products are available from MARYLAND METRICS

P.O. Box 261 Owings Mills, MD 21117 USA email: [email protected] web: http://mdmetric.com
phones: (410)358-3130 (800)638-1830 faxes: (410)358-3142 (800)872-9329

28© Copyright 2001 3/2004 1-800-245-2580 FDCR-I3N0-2GFEDER CORPOPRrinAteTdIiOn UN.S.A.