Bearings, units and housings -- Ball bearings -- Deep groove ball bearings -- Deep groove ball bearings -- SKF W 638/4 X-2Z

W 638/4 X-2Z

Dimensions

d		4	mm
D		10	mm
B		4	mm
d₁	≈	5.9	mm
D₂	≈	8.8	mm
r_1,2	min.	0.2	mm

Abutment dimensions

d_a	min.	5.6	mm
d_a	max.	5.8	mm
D_a	max.	8.8	mm
r_a	max.	0.2	mm

Calculation data

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

Mass bearing

0.0013

Model Number: W 638/4 X-2Z
Inner Diameter：4mm Outer Diameter：10mm Width：4mm
Reference speed:63000 r/min Limiting speed:130000 r/min
Type：Bearings, units and housings Ball bearings Deep groove ball bearings Deep groove ball bearings
Details： Deep groove ball bearings
Update date：2026-04-17
Application:chromatography,screen filter,Hydraulic Rama,safety testing,Hydraulic Equipment,knitted fabrics,reinforced machinery,Cutting Machine,Hydraulic Press,security equipment,extruder
Similar models:SAF 22638 x 6.7/8 TLC SAF 22638 x 7 TLC SAF 22638 TLC SAF 22638 T W 638/3-2Z W 63804-2Z W 63800-2RZ W 63806-2RS1 W 63805-2RS1 W 638/2.5 R-2Z
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