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

W 637/4 XR-2Z

Dimensions

d		4	mm
D		8	mm
B		3	mm
d₁	≈	5	mm
D₂	≈	7.4	mm
D₃		9.2	mm
C		0.6	mm
r_1,2	min.	0.1	mm

Abutment dimensions

d_a	min.	4.8	mm
d_a	max.	4.9	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

0.00061

Model Number: W 637/4 XR-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：2026-04-16
Application:insect experimental analysis instrument,Pneumatic Actuator,plastic blow molding,Spectrum Products,hydraulic pressure gauge,cleaning agent,education model Instruments,PVC,floor industry,security equipment,rubber products machinery and equipment
Similar models:W 637-2RZ W 637/4 XR W 637/8 XR W 637/2-2Z W 637/3-2Z BC2B 326379/HA4 W 637/5 XR-2Z W 637 W 637/4 X-2Z BC2B 326372/HA1
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81217 TN	85	125	31	Bearings, units and housings
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NCF 2336 ECJB/PEX	180	380	126	Bearings, units and housings
NU 2313 ECML	65	140	48	Bearings, units and housings
NUP 209 ECPH	45	85	19	Bearings, units and housings
SNW 24x4.1/8	104.775	120	87.7824	Bearings, units and housings

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