d - 4 mm

D - 9 mm

B - 4 mm

C - 4 mm

d1 - 5,2 mm

d2 - – mm

r1 min. - 4,8 mm

r2 min. - 4,8 mm

D1 - 8,1 mm

D2 - 0,1 mm

da min. - 5,1 mm

Da max. - 8,2 mm

ra max. - 0,1 mm

Weight - 0,001 Kg

Basic dynamic load rating (C) - 0,364 kN

Basic static load rating (C0) - 0,114 kN

Fatigue load limit (Pu) - 0,005

Reference speed - – r/min

Limiting speed - 40000 r/min

Calculation factor (f0) - 6,5

Calculation factor (kr) - 0,02

• Model Number: W638/4-2RS1
• Inner Diameter：4mm Outer Diameter：9mm Width：4mm
• Type：Deep Groove Ball Bearings
• Update date：2025-12-11
• Application:office equipment,agriculture,magnetic elements,Material handling equipment,Industrial,Ball screw,cooling system,power tools,raw material accessories,forklift industry,pneumatic Pump
• Similar models:SKF W638/4-2RS1 FBJ 1638ZZ ZEN 63803-2RS CX 63802-2RS SKF W63804R ISB F63800ZZ ISB 63802 ZEN 63802-2RS CYSD 1638-Z SKF W63801-2RZ
• BEARING POWER International Trading Co.,Ltd. specialize in W638/4-2RS1 products，there is large inventory of SKF W638/4-2RS1 . We has been built up long-term cooperation with SKF company, could make a bulk order of the W638/4-2RS1 Which SKF W638/4-2RS1 is the most authentic, must choose BEARING POWER, what a whole variety, reasonable price, guaranteed quality, prompt delivery via Global express.Any inquiry, never hesitate to E-mail or call +86-022-58519721 to contact us.

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