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

W 639/3-2Z

Dimensions

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

Abutment dimensions

d_a	min.	3.9	mm
d_a	max.	4.3	mm
D_a	max.	7.3	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

0.00082

Model Number: W 639/3-2Z
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:engine,Gear grinding machine,reinforced machinery,extruder,standing experimental equipment,roller lathe,horizontal processing,chemical raw materials and reagents,multi-knife lathe,Spectrum Products,laser devices
Similar models:W 639/2.5 R-2ZS W 639-2RS1 W 639/1.5-2Z W 639/3-2Z W 639/3 R-2RS1 W 639 W 639/3 R-2Z W 639/3-2RS1 W 639-2Z W 639/2 R-2Z
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Model No. Inner Diameter Outer Diameter Width Type

15866
58x72x8 HMSA10 RG
71915 CB/P4A
71922 ACE/HCP4AL
PSM 85100100 A51

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Hot number： 16048 240x280x16 HDS2 R 316967 401201 51224 6202-RSH 625/HR22T2 7219 BECBY K 17x21x17 PCMW 223801.5 M SAFS 23024 KAT x 4.1/16 SI 50 ESX-2LS TUWK 508 L W 61810-2RZ YAR 204-2F

Model No.	Inner Diameter	Outer Diameter	Width	Type
15866
58x72x8 HMSA10 RG
71915 CB/P4A
71922 ACE/HCP4AL
PSM 85100100 A51