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

W 638/4 XR-2Z

Dimensions

d		4	mm
D		10	mm
B		4	mm
d₁	≈	5.9	mm
D₂	≈	8.8	mm
D₃		11.6	mm
C		0.8	mm
r_1,2	min.	0.15	mm

Abutment dimensions

d_a	min.	5.6	mm
d_a	max.	5.8	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		130000	r/min
Limiting speed		63000	r/min
Calculation factor	k_r	0.02
Calculation factor	f₀	12.3

Mass

Mass bearing

0.0015

Model Number: W 638/4 XR-2Z
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：2026-04-16
Application:Dental Equipment,tray industry,key lock,gear type,engineering machine,survey accessories,bio-chemical,enzyme,chamfering machine etc,Perfusion device,quality inspection equipment
Similar models:SAF 22638 T SAF 22638 x 7 W 63804-2RZ W 638/2.5 R-2Z W 63806-2RZ W 638/5-2RZ W 638/4 X-2RS1 W 638/4-2Z SAF 22638 x 7 T W 63805-2RZ
BEARING POWER International Trading Co.,Ltd. specialize in W638/4XR-2Z products，there is large inventory of SKF W 638/4 XR-2Z Deep groove ball bearings. We has been built up long-term cooperation with SKF company, could make a bulk order of the W 638/4 XR-2Z Which SKF W638/4XR-2Z is the most authentic, must choose BEARING POWER, what a whole variety, reasonable price, guaranteed quality, prompt delivery via Global express. Any inquiry, never hesitate to E-mail or call +86-022-58519721 to contact us.

Model No.	Inner Diameter	Outer Diameter	Width	Type
2210 ETN9	50	90	23	Bearings, units and housings
32x52x7 HMSA10 V	32	52	7	Seals
3302 A-2RS1TN9/MT33	15	42	19	Bearings, units and housings
534949	24.003	62.001	8.001	Seals
535/532 X	44.45	107.95	36.512	Bearings, units and housings
7205 ACD/HCP4A	25	52	15	Bearings, units and housings
84697	-	-	50.8	Seals
BT4-8123 E/C775	560	920	-	Bearings, units and housings
BD-C 2213 KTN9-AH 313 G	60	120	31	Bearings, units and housings
KR 52 PPA	-	52	66	Bearings, units and housings
NU 1884 MP	420	520	46	Bearings, units and housings
SNW 3024x4	101.6	155.702	74.5998	Bearings, units and housings

Purchase the SKF W 638/4 XR-2Z Please fill in the following

Hot number： 230/850 CAK/W33 23640 36185 51204 V/HR11Q1 71904 ACD/P4A 87166 FY 20 TDW HA 2313 HK 5520 NJ 244 ECML NJ 344 M NN 3036 K/SPW33 PCMF 060808 E QJ 316 N2PHAS W 61803-2Z