Bearings, units and housings -- Ball bearings -- Deep groove ball bearings -- Deep groove ball bearings -- SKF W 638/4 X-2RS1

W 638/4 X-2RS1

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		0	r/min
Limiting speed		36000	r/min
Calculation factor	k_r	0.02
Calculation factor	f₀	12.3

Mass

Mass bearing

0.0013

Model Number: W 638/4 X-2RS1
Inner Diameter：4mm Outer Diameter：10mm Width：4mm
Reference speed:36000 r/min Limiting speed:0 r/min
Type：Bearings, units and housings Ball bearings Deep groove ball bearings Deep groove ball bearings
Details： Deep groove ball bearings
Update date：2026-08-24
Application:engineering machinery,Film machine,printing equipment,equipment,sucker industry,plastic rolling,surgical instruments,hydraulic control element,tobacco machinery,quality inspection equipment,test laboratory equipment and accessories
Similar models:W 63804 R W 63800 R SAF 22638 x 7 T SAF 22638 x 6.7/8 TLC W 63806-2RS1 W 63800-2RZ SAF 22638 W 63803 R W 638/2-2Z W 638/8-2Z
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Model No. Inner Diameter Outer Diameter Width Type

2650560
71911 CE/P4AH1
8795
FSAF 22611
PWKRE 90.2RS

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Hot number： 113740 20x35x7 CRW1 V 24445 32502 365x405x18 HDS2 R 400164 585x620x20 HDS2 R 6 VS R 71905 ACD/P4A 90867 FY 1.1/4 FM FYT 1. TF/VA228 K 16x22x16 SAFS 22544 x 7.7/8 XHCE 055/OK 140

Model No.	Inner Diameter	Outer Diameter	Width	Type
2650560
71911 CE/P4AH1
8795
FSAF 22611
PWKRE 90.2RS