Resin Nut Ball Screw R Series

Resin nut ball screws RW series
R series

Page
Features and specifications of R series ball screws —————— B_246
Ordering instructions ————————————————— B_247
Stocked RW series (C7 grade)
• 8 mm shaft diameter, Unfinished shaft-ends ———————— B_248

B245

Resin nut ball screws R series

Features

Light Weight and Compact !

• New compact ballnut design, and with a new improved end deflector.
• The new design of the end deflector is installed on both ends of ball nut which makes ballnut length shorter.

Corrosion resistance improved due to the use of a Stainless Steel ballnut !

• Stainless steel shaft for anti-corrosion.
• Advanced corrosion resistant design allows for the use in harsh environments.

Wear Resistance, Longer life !

• The desk devise is easer due to a lighter weight resin nut.
• Superior corrosion and wear resistance by using a PolyPhenylene Sulfide ballnut.

Short delivery !

• Short delivery because of stocked item.

Summary of the specifications

Shaft diameter: ø8 mm, lead: 2 mm
Accuracy grade: C7 grade
Nut type: single nut
Recirculation system: end deflector method

End deflector End deflector Appearance

RW series Ball

Nut

Series product line-up

Series name Nut type Accuracy grade Shaft diameter line-up Shaft type Product line

RW series Single nut C7 ø8 Both ends unfinished Standard (in-stock)
product line

• In standard (in-stock) product line, both ends of the screw shaft are not finished. Additional end machining to fulfill your needs and operating
conditions is required.

Options available for standard (in-stock) ball screws

Series Additional end machining Axial clearance adjustment Surface treatment Grease Direction of nut Wiper detachment

RW series o x --- o o ---

• In RW series, both ends of the screw shaft are not finished. Additional end machining to fulfill your needs and operating conditions is required.
• Alvania Grease S2 is contained in a nut shipped from KURODA, unless otherwise specified. Contact KURODA if you want other greases to be

contained.

B246

Model numbers of R series

Model Screw Lead Number Combinati Flange Ball Wiper Thread Overall Shaft end Thread Accuracy Axial
series shaft 02 of on type recirculati material direction length of type length grade clearance
diameter 02 on system screw shaft
Example of RW 08 circuits B R C7 M
the model
number RW 08 P S- B PN R - 0400 X 0300 - C7 M
A, X -
P S- PN To be shown To be shown
with a 4-digit
- with a 4-digit
number in number in
metric unit metric unit
(mm)
(mm)

• For more details, refer to specifications and data for each size.

Materials

• Screw Shaft is Stainless Steel (SUS304) for anti-corrosion, Nut is PolyPhenylene Sulfide (PPS), which is a superior corrosion protection and
stable dimension. The Steel balls are also Stainless Steel (SUS440C) for anti-crrosion protection.

Part name Material Heat treatment
Screw shaft Stainless steel (SUS304) ---
Super engineering plastic (PPS) ---
Nut Stainless steel (SUS440C)
Ball Quenching

RW series

B247

B248 RW series
Standard Resin Nut Ball Screw: RW Series (Accuracy grade C7)
Screw shaft diameter ø8, Lead 2
UNFINISHED SHAFT ENDS
(Unit: mm)
30° 30°
4-3.4 drilled hole 14 7
43
PCD25
19
28
ø18

0

ø18-0.2
(ø8)

Lt

Ball screw specifications

Screw shaft diameter 8 Axial clearance ~0.030 (M) Model No. Axial Lt Wiper Mass
Lead 2 Permissible axial load 40N clearance (kg)
Right-hand Permissible rotational speed
Thread direction 3.7 turn 1 circuit 3000min-1 RW0802PS-BPNR-0200A ~0.030 (M) 200 0.08
Number of circuits 1.5875 Lubricant Alvania Grease S2 RW0802PS-BPNR-0400A None

Ball diameter 400 0.14

• The grease is contained inside of nut only at the time of delivery.
When using it, apply lubricant where appropriate.

Table of optional specifications for each model

Additional machining Axial clearance Surface Difference Direction Notation of standard resin nut ball screw
treatment of grease of nut
of shaft end adjustment • Standard length shaft without end machining
o o
o x --- RW0802PS-BPNR- A

• With end machining specified on your drawing

RW0802PS-BPNR- X -C7M

||

Overall length Thread length

Technical Data
of Ball Screws

D30

Technical Data
of Ball Screws

D31