d - 8 mm

D - 28 mm

B - 9 mm

d₂ - - 13.9 mm

D₂ - - 22.38 mm

r_1,2 - min. - 0.3 mm

d_a - min. - 10 mm

d_a - max. - 13.8 mm

D_a - max. - 26 mm

r_a - max. - 0.3 mm

Basic dynamic load rating - C - 4 kN

Basic static load rating - C₀ - 2 kN

Fatigue load limit - P_u - 0.083 kN

Reference speed - 67000 r/min

Limiting speed - 40000 r/min

Calculation factor - k_r - 0.035

Calculation factor - f₀ - 12.4

Mass bearing - 0.0273 kg

• Model Number: W 638
• Inner Diameter：28mm Outer Diameter：8mm Width：9mm
• Type：Deep Groove Ball Bearings
• Update date：2025-12-17
• Application:Surveying Surveying Instruments,plastic molding,teaching equipment,equipment,garbage disposal,suction nozzle,reducer,product accessories,Vertical machining,respirator,Hairbrush device
• Similar models:ZEN 63800 SKF W638/5-2Z SKF W638/2-2Z SKF W638/4X-2RS1 SKF W638/4R-2RS1 ISO 638 ZEN 63801 SKF W63802R ISO 63803 ISB SS638/8-ZZ
• BEARING POWER International Trading Co.,Ltd. specialize in W638 products，there is large inventory of SKF W 638 . We has been built up long-term cooperation with SKF company, could make a bulk order of the W 638 Which SKF W638 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.

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  3219-2RS	95	170	55,6	ISB	Angular Contact Ball Bearings
  33213	65	120	41	CYSD	Tapered Roller Bearings
  54418U+U418	93			ISO	Thrust Ball Bearings
  7306 BEGAP	72	30	19	SKF	Angular Contact Ball Bearings
  F10246/394A	61,913	110	22	Fersa	Tapered Roller Bearings
  GEZ 212 ESX-2LS	111,125	69,85	61,112	SKF	Plain Bearings
  NAP205-16	25,4		36,5	KOYO	Bearing Units
  NNCF5012CV	60	95	46	SKF	Cylindrical Roller Bearings
  RNA4848	265	300	60	NSK	Needle Roller Bearings
  SBPFL206-18	25		30	KOYO	Bearing Units
  VTAA19Z-4	19,2	41	12	NSK	Angular Contact Ball Bearings
  X33212/Y33212	60	110	38	Timken	Tapered Roller Bearings
  DNJB5908	40	62	30	FAG	NEEDLE BEARINGS
  NU3006	30	55	19	FAG	CYLINDRICAL ROLLER BEARINGS
  XLS-12	12.0000	16.0000	2.0000	HOFF	DEEP GROOVE BALL BEARINGS
  32303	17	47	19	STEYR	TAPERED ROLLER BEARINGS
  773L07	35	62	14	New Departure	DEEP GROOVE BALL BEARINGS
  HJ-2224	120		11	CONSOLIDATED	CYLINDRICAL ROLLER BEARINGS