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

W 638/4 R-2Z

Dimensions

d		4	mm
D		9	mm
B		4	mm
d₁	≈	5.2	mm
D₂	≈	8.1	mm
D₃		10.3	mm
C		1	mm
r_1,2	min.	0.1	mm

Abutment dimensions

d_a	min.	4.8	mm
d_a	max.	5.1	mm
r_a	max.	0.1	mm

Calculation data

Basic dynamic load rating	C	0.364	kN
Basic static load rating	C₀	0.114	kN
Fatigue load limit	P_u	0.005	kN
Reference speed		140000	r/min
Limiting speed		70000	r/min
Calculation factor	k_r	0.02
Calculation factor	f₀	6.5

Mass

Mass bearing

0.0011

Model Number: W 638/4 R-2Z
Inner Diameter：4mm Outer Diameter：9mm Width：4mm
Reference speed:70000 r/min Limiting speed:140000 r/min
Type：Bearings, units and housings Ball bearings Deep groove ball bearings Deep groove ball bearings
Details： Deep groove ball bearings
Update date：2024-12-17
Application:Cylinder Special,plastic molding,water,orthodontic material,ventilator anesthesia machine etc,scientific instruments,air purification,wheel lathe,Forging machine,Animal Tracking,Reflective Materials Industrial fabrics
Similar models:SAF 22638 x 6.13/16 T W 63800-2Z W 63802 R-2Z W 638 W 63805 W 63803-2RZ W 63801 R-2Z W 63806-2RS1 W 63801 W 638/4-2RS1
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1125257	285.75	323.85	19.05	Seals
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300 VA V	270	-	-	Seals
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PFT 20 RM	20	-	-	Bearings, units and housings
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