Bearings, units and housings -- Ball bearings -- Deep groove ball bearings -- Deep groove ball bearings -- SKF W 639/3 R-2Z

W 639/3 R-2Z

Dimensions

d		3	mm
D		8	mm
B		4	mm
d₁	≈	4.35	mm
D₂	≈	7.25	mm
D₃		9.5	mm
C		0.9	mm
r_1,2	min.	0.15	mm

Abutment dimensions

d_a	min.	3.9	mm
d_a	max.	4.3	mm
r_a	max.	0.15	mm

Calculation data

Basic dynamic load rating	C	0.319	kN
Basic static load rating	C₀	0.09	kN
Fatigue load limit	P_u	0.004	kN
Reference speed		150000	r/min
Limiting speed		75000	r/min
Calculation factor	k_r	0.025
Calculation factor	f₀	6.1

Mass

Mass bearing

0.00092

Model Number: W 639/3 R-2Z
Inner Diameter：3mm Outer Diameter：8mm Width：4mm
Reference speed:75000 r/min Limiting speed:150000 r/min
Type：Bearings, units and housings Ball bearings Deep groove ball bearings Deep groove ball bearings
Details： Deep groove ball bearings
Update date：2026-06-24
Application:horizontal processing,Gas turbine,molding machine,medical equipment,Control,Film machine,relay,Pump,noise reduction equipment,Warehouse Shelf Equipment,hydraulic cylinder
Similar models:W 639/1.5 R-2Z W 639-2RS1 W 639/2.5-2ZS W 639-2RZ W 639/2-2Z W 639/3 R-2RS1 W 639/1.5-2Z LL 639249/210 W 639/3-2RS1 W 639
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Model No. Inner Diameter Outer Diameter Width Type

317-Z
71920 ACD/HCP4AH1
FYTJ 1.1/2 TF
HM 3160
SAFS 22244 T

Purchase the SKF W 639/3 R-2Z Please fill in the following

Hot number： 21318 EK 22344-2CS5/VT143 BD-23296 CAK/W33-OH 3296 H 3050785 344/332 AA 400800 524213 71911 CE/P4AH1 71924 CD/HCP4AH1 BT4B 331934/HA4 NA 4906 PCM 9510030 M PSM 202630 A51 QJ 1017 N2MA/C4 SSAFS 23028 KA x 4.13/16

Model No.	Inner Diameter	Outer Diameter	Width	Type
317-Z
71920 ACD/HCP4AH1
FYTJ 1.1/2 TF
HM 3160
SAFS 22244 T