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：2026-04-17
Application:tobacco machinery,manual Tools,electronic materials,electrostatic protection,Rolling mill gear box,Machine tool accessories,noise inspection,Gear grinding machine,forming machine,Vertical pull,chamfer
Similar models:W 63804-2RS1 SAF 22638 x 6.7/8 TLC W 63805-2Z W 63802 R-2Z W 638/5 R-2Z W 638/5-2RS1 638/5-2Z W 63806-2RS1 W 63802 R W 638/5-2Z
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
107551	273.05	323.85	15.88	Seals
10x26x7 HMSA10 RG	10	26	7	Seals
23702	60.325	85.09	9.53	Seals
38x62x7 HMSA10 RG	38	62	7	Seals
51101 V/HR11Q1	12	26	9	Bearings, units and housings
61840	200	250	24	Bearings, units and housings
FYWR 25 YTHR	25	-	-	Bearings, units and housings
G 14x21x3	14	21	3	Seals
K 89318 M	90	155		Bearings, units and housings
S7004 CE/HCP4A	20	42	12	Bearings, units and housings
SI 60 ESX-2LS	60	-	44	Bearings, units and housings
SNL 3140 ATURA	182.5625	-	-	Bearings, units and housings

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Hot number： 19940 24156 CCK30/W33 6202-ZNR 7019 ACE/HCP4AH1 71920 CB/HCP4A 7309 BECBY 7409 BCBM 90807 D/W R168 R-2Z HE 2336 NATR 6 PPA NUH 2234 ECMH PWM 190210250 S71920 ACD/P4A SAF 1513