d - 9 mm

D - 30 mm

B - 10 mm

d₂ - - 15.3 mm

D₂ - - 25.28 mm

r_1,2 - min. - 0.6 mm

d_a - min. - 13 mm

D_a - max. - 26 mm

r_a - max. - 0.6 mm

Basic dynamic load rating - C - 4.9 kN

Basic static load rating - C₀ - 2.3 kN

Fatigue load limit - P_u - 0.1 kN

Reference speed - 60000 r/min

Limiting speed - 36000 r/min

Calculation factor - k_r - 0.035

Calculation factor - f₀ - 12.9

Mass bearing - 0.0335 kg

• Model Number: W 639
• Inner Diameter：30mm Outer Diameter：9mm Width：10mm
• Type：Deep Groove Ball Bearings
• Update date：2025-12-17
• Application:vacuum filter,Logistics Equipment,static control,suction nozzle,industrial skin care,Pneumatic Actuator,Security Equipment,small appliances,noise reduction equipment,Other Machine Tools,Individual Wire
• Similar models:KOYO 639 NSK 639 SKF W639/2.5R-2ZS CYSD 1639-Z KOYO 639ZZ CYSD 1639 SKF W639-2Z SKF W639-2RS1 ISO 639ZZ CYSD 1639-RS
• BEARING POWER International Trading Co.,Ltd. specialize in W639 products，there is large inventory of SKF W 639 . We has been built up long-term cooperation with SKF company, could make a bulk order of the W 639 Which SKF W639 is the most authentic, must choose BEARING POWER, what a whole variety, reasonable price, guaranteed quality, prompt delivery via Global express.Any inquiry, never hesitate to E-mail or call +86-022-58519721 to contact us.

• Model No.	Inner Diameter	Outer Diameter	Width	Brand	Type
  1304SK	20	52	15	NTN	Self-Aligning Ball Bearings
  22220EX	100	180	46	NACHI	Cylindrical Roller Bearings
  239/1120 KCW33+H39/1120	1120	1460	250	ISO	Spherical Roller Bearings
  480/472A	68,262		29,007	KOYO	Tapered Roller Bearings
  AST650 708580	70	85		AST	Plain Bearings
  6030	150	225	35	NSK	Deep Groove Ball Bearings
  7040 CDT	200	310	102	ISO	Angular Contact Ball Bearings
  7220CDB/GNP5	100	180	68	NTN	Angular Contact Ball Bearings
  B-1418	22,225	28,575	28,58	NSK	Needle Roller Bearings
  E32919J	95	130	23	NACHI	Tapered Roller Bearings
  HCB7017-C-T-P4S	85	130	22	FAG	Angular Contact Ball Bearings
  K81222TN	110	160	117	SKF	Thrust Roller Bearings
  N326	130	280	58	ISO	Cylindrical Roller Bearings
  T7FC065	65	130	37	FAG	Tapered Roller Bearings
  UCTH211-300	55		141	KOYO	Bearing Units
  VKBA 739				SKF	Wheel Bearings
  WS81116	80	105		SKF	THRUST ROLLER BEARINGS
  120-KSFFG	100	150	24	MRC	DEEP GROOVE BALL BEARINGS
  LS-8	.7500	1.8750	.5625	FED	DEEP GROOVE BALL BEARINGS
  MS-5-AC	.5000	1.6250	.6250	CONSOLIDATED	ANGULAR CONTACT BALL BEARINGS