Bearings, units and housings -- Ball bearings -- Deep groove ball bearings -- Deep groove ball bearings -- SKF W 638/4-2RS1

W 638/4-2RS1

Dimensions

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

Abutment dimensions

d_a	min.	4.8	mm
d_a	max.	5.1	mm
D_a	max.	8.2	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		0	r/min
Limiting speed		40000	r/min
Calculation factor	k_r	0.02
Calculation factor	f₀	6.5

Mass

Mass bearing

0.001

Model Number: W 638/4-2RS1
Inner Diameter：4mm Outer Diameter：9mm Width：4mm
Reference speed:40000 r/min Limiting speed:0 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:chemical raw materials and reagents,outdoor equipment,Switch,bathroom facilities,municipal machinery,teaching equipment,agrochemical,surgical instruments,Antenna Potentials,forklift truck,Low-voltage electrical equipment
Similar models:W 63806 R-2Z W 638-2RS1 SAF 22638 x 6.7/8 T W 63802 R-2Z W 638/3 R-2Z W 63805 R W 63806-2Z W 63800-2Z W 63803 R-2Z W 63800-2RZ
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NUP 234 ECM	170	310	52	Bearings, units and housings
OKC 140	140		-
QJ 205 MA	25	52	15	Bearings, units and housings
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Hot number： BD-21315 EK-AH 315 G 6231 7004 ACD/HCP4AH 71956 ACD/P4A 7316 BECBM TQO design C 3136 K GEH 80 ESX-2LS H 969249/210/HA4 KMK 18 NK 5/10 TN NU 2222 ECML NU 314 ECML RNU 2210 ECJ SYNT 35 L