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

W 638/4 X-2RZ

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.	8.9	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-2RZ
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：2026-07-31
Application:gear type,insect experimental analysis instrument,Spectrum Products,raw material accessories,Pneumatic Actuator,thread processing machine,hydraulic connector,Generator,electromagnet,pneumatic,Polymer
Similar models:W 638/3 R-2RS1 SAF 22638 x 6.13/16 W 63804-2Z W 638/2 R-2Z W 638/4 XR-2Z W 63800-2Z W 63801-2RS1 SAF 22638 TLC SAF 22638 x 6.13/16 TLC 638/5-2Z
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Model No. Inner Diameter Outer Diameter Width Type

210 NR
29262
SY 3. UTF
T2ED 050
TUWK 1.1/4 LTHR

Purchase the SKF W 638/4 X-2RZ Please fill in the following

Hot number： 17847 24904 250x280x15 HMSA10 RG 25x45x7 HMSA10 RG 725 VA V 95x115x12 CRSA1 R BT4B 329007/HA1 FSNL 522 TURU FYAWK 1.1/4 LTA GE 300 ESX-2LS N 12 SAW 23518 x 3.1/8 T SNL 3136 SYFJ 20 TF W 635-2Z

Model No.	Inner Diameter	Outer Diameter	Width	Type
210 NR
29262
SY 3. UTF
T2ED 050
TUWK 1.1/4 LTHR