Bearings, units and housings -- Ball bearings -- Deep groove ball bearings -- Deep groove ball bearings -- SKF W 637/4 X-2Z

W 637/4 X-2Z

Dimensions

d		4	mm
D		8	mm
B		3	mm
d₁	≈	5	mm
D₂	≈	7.4	mm
r_1,2	min.	0.1	mm

Abutment dimensions

d_a	min.	4.8	mm
d_a	max.	4.9	mm
D_a	max.	7.5	mm
r_a	max.	0.1	mm

Calculation data

Basic dynamic load rating	C	0.225	kN
Basic static load rating	C₀	0.072	kN
Fatigue load limit	P_u	0.003	kN
Reference speed		150000	r/min
Limiting speed		75000	r/min
Calculation factor	k_r	0.02
Calculation factor	f₀	7.2

Mass

Mass bearing

0.00051

Model Number: W 637/4 X-2Z
Inner Diameter：4mm Outer Diameter：8mm Width：3mm
Reference speed:75000 r/min Limiting speed:150000 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:injection molding machine,municipal machinery,laser devices,transportation equipment,Oral Image,Energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving,CNC,EEG,Pump,medical equipment,preservation equipment
Similar models:W 637/3-2Z W 637/8-2Z W 637/9-2ZS W 637/8-2ZS W 637-2RS1 BC2B 326372/HA1 PWM 556370 W 637-2RZ W 637/4 X-2Z W 637/4 XR-2Z
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Model No. Inner Diameter Outer Diameter Width Type

BD-21315 EK-AH 315 G
NJ 2313 ECPH
SY 1.3/8 TF/VA228
T4DB 150
Z 006

Purchase the SKF W 637/4 X-2Z Please fill in the following

Hot number： 21763 495 VRME R 50x72x10 HMSA10 V 6207 ETN9 7026 ACD/P4AH1 86738 90807 BT2B 332504/HA2 FSAF 22517 x 2.13/16 TLC FYAWK 1.1/4 LTHR GS 89412 PCM 455050 E PSM 253525 A51 SYJ 65 KF WBB1-8709

Model No.	Inner Diameter	Outer Diameter	Width	Type
BD-21315 EK-AH 315 G
NJ 2313 ECPH
SY 1.3/8 TF/VA228
T4DB 150
Z 006