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

W 638/4-2RS1

Dimensions

d		4	mm
D		9	mm
B		4	mm
d₁	≈	5.2	mm
D₂	≈	8.1	mm
r_1,2	min.	0.1	mm

Abutment dimensions

d_a	min.	4.8	mm
d_a	max.	5.1	mm
D_a	max.	8.2	mm
r_a	max.	0.1	mm

Calculation data

Basic dynamic load rating	C	0.364	kN
Basic static load rating	C₀	0.114	kN
Fatigue load limit	P_u	0.005	kN
Reference speed		0	r/min
Limiting speed		40000	r/min
Calculation factor	k_r	0.02
Calculation factor	f₀	6.5

Mass

Mass bearing

0.001

Model Number: W 638/4-2RS1
Inner Diameter：4mm Outer Diameter：9mm Width：4mm
Reference speed:40000 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：2026-06-24
Application:stirrer,Textile Accessories,medical equipment,paint paint,water protection,ECG,Perfusion device,chromatography,Microwave Equipment,Cylinder Pneumatic Treatment Element,knitted fabrics
Similar models:W 638/2 X-2Z W 63803-2RS1 W 638/1.5 R-2Z W 63806-2RZ W 638/3-2Z W 638/3-2RS1 W 63804-2RZ W 63802-2RZ W 63801-2RS1 W 63805-2Z
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Model No. Inner Diameter Outer Diameter Width Type

471241
4912
7324 BGAM
BSA 204 C
OKCX 690

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Hot number： 130x170x12 HMSA10 RG 23725 30x42x6 HMS5 RG 32312 360x392x20 HDS1 R 400805 BS2-2210-2RS/VT143 D/W R8 R-2Z FYAWK 25 LTHR NNCF 4860 CV P 17 FM PBMF 162216 M1G1 PCM 125130100 M SA 25 C XHCE 070/OK 210

Model No.	Inner Diameter	Outer Diameter	Width	Type
471241
4912
7324 BGAM
BSA 204 C
OKCX 690