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：2025-12-09
• Application:cleaners,milling head plug,metallurgical mold,plastic blow molding,SPA equipment,forming machine,Equipment,office equipment,experimental equipment,Gas turbine,Spectrum Products
• Similar models:SKF 638-2RZ SKF W63806-2RZ ZEN F63800-2Z SKF W638/1.5R-2Z SKF W638/9-2Z AST 638H CYSD 1638-ZZ ISB 63801-ZZ ZEN 638 SKF W63802
• 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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  X3ZZ	3	8	3	SKF	DEEP GROOVE BALL BEARINGS
  BK-2020	26		20	CONSOLIDATED	NEEDLE BEARINGS