Bearings, units and housings -- Ball bearings -- Deep groove ball bearings -- Deep groove ball bearings -- SKF W 638/8 R-2Z

W 638/8 R-2Z

Dimensions

d		8	mm
D		16	mm
B		6	mm
d₂	≈	9.65	mm
D₂	≈	14.2	mm
D₃		18	mm
C		1.3	mm
r_1,2	min.	0.2	mm

Abutment dimensions

d_a	min.	9.5	mm
d_a	max.	9.6	mm
r_a	max.	0.2	mm

Calculation data

Basic dynamic load rating	C	0.715	kN
Basic static load rating	C₀	0.3	kN
Fatigue load limit	P_u	0.012	kN
Reference speed		90000	r/min
Limiting speed		45000	r/min
Calculation factor	k_r	0.02
Calculation factor	f₀	7.5

Mass

Mass bearing

0.0051

Model Number: W 638/8 R-2Z
Inner Diameter：8mm Outer Diameter：16mm Width：6mm
Reference speed:45000 r/min Limiting speed:90000 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:Hydraulic Hose,Liposuction device,Chromatography Products,trolley,product accessories,hydraulic cylinder,power source,power protection,quality inspection equipment,insect experimental analysis instrument,Performance test
Similar models:W 638/5 R-2Z W 638/1.5 R-2Z SAF 22638 W 63806-2RZ SAF 22638 x 7 W 63804 W 63801 R W 63805-2RZ W 63806 W 638/5-2RZ
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Model No.	Inner Diameter	Outer Diameter	Width	Type
150 VA V	135	-	-	Seals
22492	57.15	85.09	11.13	Seals
31309	45	100	27.25	Bearings, units and housings
6120	15.875	22.23	4.78	Seals
61818-2RZ	90	115	13	Bearings, units and housings
7316 BECBJ	80	170	39	Bearings, units and housings
90887	-	-	30	Seals
99550	139.7	150.8252	17.907	Seals
FYTB 35 TR	35	-	-	Bearings, units and housings
HE 2330 L	133.35	180	139	Bearings, units and housings
NJ 2238 ECML	190	340	92	Bearings, units and housings
PRM 252830	25	28	30	Bearings, units and housings

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