Bearings, units and housings -- Ball bearings -- Deep groove ball bearings -- Deep groove ball bearings -- SKF W 638

W 638

Dimensions

d		8	mm
D		28	mm
B		9	mm
d₂	≈	13.9	mm
D₂	≈	22.38	mm
r_1,2	min.	0.3	mm

Abutment dimensions

d_a	min.	10	mm
d_a	max.	13.8	mm
D_a	max.	26	mm
r_a	max.	0.3	mm

Calculation data

Basic dynamic load rating	C	3.97	kN
Basic static load rating	C₀	1.96	kN
Fatigue load limit	P_u	0.083	kN
Reference speed		67000	r/min
Limiting speed		40000	r/min
Calculation factor	k_r	0.035
Calculation factor	f₀	12.4

Mass

Mass bearing

0.027

Model Number: W 638
Inner Diameter：8mm Outer Diameter：28mm Width：9mm
Reference speed:40000 r/min Limiting speed:67000 r/min
Type：Bearings, units and housings Ball bearings Deep groove ball bearings Deep groove ball bearings
Details： Deep groove ball bearings
Update date：2025-12-09
Application:top industry,mechanical and electrical,marine analysis,Laser Devices,mechanical annex,organic raw materials,Handling machinery and various industrial machinery,plastic rolling,Automation,metallurgical mold,chamfering machine etc
Similar models:W 638/2 R-2Z W 63804-2RS1 W 638/4 X-2RS1 W 63805-2RS1 SAF 22638 x 6.7/8 TLC W 63802-2RZ SAF 22638 T W 63803-2RZ W 63800 R-2RS1 SAF 22638 x 7 T
BEARING POWER International Trading Co.,Ltd. specialize in W638 products，there is large inventory of SKF W 638 Deep groove ball bearings. We has been built up long-term cooperation with SKF company, could make a bulk order of the W 638 Which SKF W638 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
3311 A	55	120	49.2	Bearings, units and housings
534955	31.75	53.975	6.502	Seals
7214 CD/P4A	70	125	24	Bearings, units and housings
FYWR 40 YTHR	40	-	-	Bearings, units and housings
N 220 ECP	100	180	34	Bearings, units and housings
NU 2316 ECML	80	170	58	Bearings, units and housings
NUP 211 ECP	55	100	21	Bearings, units and housings
PCM 10511060 E	105	110	60	Bearings, units and housings
PSMF 607560 A51	60	75	60	Bearings, units and housings
SAFS 22524 x 4.1/8 T	104.775	-	-	Bearings, units and housings
SALA 80 TXE-2LS	80	-	55	Bearings, units and housings
W 61908 R	40	62	12	Bearings, units and housings

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Hot number： 213 22380 CAK/W33 7310 ACCBM 85085 8741 AHX 2322 G BT4B 328827 ABG/HA1VA902 G 32x45x4 HK 2216 IR 100x115x40 NK 29/20 TN NUP 244 ECM NUP 316 ECML SAFS 22524 TLC W 627/5-2Z