d - 4 mm

D - 10 mm

B - 4 mm

d₁ - - 5.9 mm

D₂ - - 8.8 mm

D₃ - 11.6 mm

C - 0.8 mm

r_1,2 - min. - 0.15 mm

d_a - min. - 5.6 mm

r_a - max. - 0.15 mm

Basic dynamic load rating - C - 0.553 kN

Basic static load rating - C₀ - 0.245 kN

Fatigue load limit - P_u - 0.011 kN

Reference speed - 130000 r/min

Limiting speed - 63000 r/min

Calculation factor - k_r - 0.02

Calculation factor - f₀ - 12.3

Mass bearing - 0.0015 kg

• Model Number: W 638/4 XR-2Z
• Inner Diameter：10mm Outer Diameter：4mm Width：4mm
• Type：Deep Groove Ball Bearings
• Update date：2025-04-25
• Application:Low-voltage electrical equipment,tapping machine,Logistics Equipment,Power equipment,Cutting Machine,Display Devices,miscellaneous instruments,Industrial,equipment,metallurgy,plant determination
• Similar models:ISB 638/8-ZZ ZEN S638-2Z SKF W63800-2RS1 ISB 638/5-ZZ SKF W63801 FBJ 1638ZZ ISO 63803 SKF 638-2RZ SKF W638/3R-2RS1 ISB 63803-ZZ
• BEARING POWER International Trading Co.,Ltd. specialize in W638/4XR-2Z products，there is large inventory of SKF W 638/4 XR-2Z . We has been built up long-term cooperation with SKF company, could make a bulk order of the W 638/4 XR-2Z Which SKF W638/4XR-2Z 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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  NNU 4956 BK/SPW33	280	380	100	SKF	Cylindrical Roller Bearings
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  UCPK322	110		117	NACHI	Bearing Units
  NNCL4948V.C3	240	320	80	FAG	CYLINDRICAL ROLLER BEARINGS
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