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

W 639/2-2Z

Dimensions

d		2	mm
D		6	mm
B		3	mm
d₁	≈	3	mm
D₂	≈	5.4	mm
r_1,2	min.	0.15	mm

Abutment dimensions

d_a	min.	2.9	mm
d_a	max.	2.9	mm
D_a	max.	5.4	mm
r_a	max.	0.15	mm

Calculation data

Basic dynamic load rating	C	0.19	kN
Basic static load rating	C₀	0.051	kN
Fatigue load limit	P_u	0.002	kN
Reference speed		180000	r/min
Limiting speed		90000	r/min
Calculation factor	k_r	0.025
Calculation factor	f₀	6

Mass

Mass bearing

0.00031

Model Number: W 639/2-2Z
Inner Diameter：2mm Outer Diameter：6mm Width：3mm
Reference speed:90000 r/min Limiting speed:180000 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:equipment,flow control valve,ultra-quiet generators,impression material,coal mill,embroidery cloth,ventilation heating equipment,garbage disposal,Infrared Technology,Automation,Machine tool accessories
Similar models:W 639/2 R-2Z 6391/K-6320 W 639/1.5-2Z W 639/2-2Z LL 639249/210 W 639 W 639/2.5-2ZS W 639-2Z W 639-2RS1 W 639/3 R-2RS1
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18737	47.625	73.03	7.95	Seals
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524204	228.6	-	-	Seals
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65x80x8 HMSA10 V	65	80	8	Seals
708 CD/P4A	8	22	7	Bearings, units and housings
7320 BECBM	100	215	47	Bearings, units and housings
FSAF 22520 x 3.5/16 TLC	84.1375	-	-	Bearings, units and housings
KRV 22 PPA	-	22	36	Bearings, units and housings
NU 244 ECM	220	400	65	Bearings, units and housings
SAF 1513 x 2.1/8 T	53.975	-	-	Bearings, units and housings
SYNT 70 LTS	70	-	-	Bearings, units and housings

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