d - 1 mm

D - 3 mm

B - 1.5 mm

d₁ - - 1.55 mm

D₁ - - 2.46 mm

r_1,2 - min. - 0.05 mm

d_a - min. - 1.4 mm

d_a - max. - 1.5 mm

D_a - max. - 2.6 mm

r_a - max. - 0.05 mm

Basic dynamic load rating - C - 0.052 kN

Basic static load rating - C₀ - 0.012 kN

Fatigue load limit - P_u - 0.001 kN

Reference speed - 240000 r/min

Limiting speed - 150000 r/min

Calculation factor - k_r - 0.02

Calculation factor - f₀ - 5.6

Mass bearing - 0.0001 kg

• Model Number: W 638/1
• Inner Diameter：3mm Outer Diameter：1mm Width：1,5mm
• Type：Deep Groove Ball Bearings
• Update date：2025-12-10
• Application:machining,car instrument,Industrial Electromechanical,animal anatomy,Display Devices,sample cup,metallurgical mold,medical equipment,journal lathe,electromagnetic clutch,spectrometer
• Similar models:SKF W63803-2RZ SKF W63805 ISO 638ZZ SKF W63800R ISB SS638/4-ZZ SKF W63805R-2Z ISO 63800ZZ SKF W63801-2RZ ISB 63801-ZZ SKF W63806-2Z
• BEARING POWER International Trading Co.,Ltd. specialize in W638/1 products，there is large inventory of SKF W 638/1 . We has been built up long-term cooperation with SKF company, could make a bulk order of the W 638/1 Which SKF W638/1 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
  22315-E-K-W33	75	160	55	NKE	Spherical Roller Bearings
  22340RHA	200	420	138	KOYO	Spherical Roller Bearings
  23052 CW33	260	400	104	CX	Spherical Roller Bearings
  32012X	60	95	23	Timken	Tapered Roller Bearings
  6915ZZ	75	105	16	FBJ	Deep Groove Ball Bearings
  7340DT	200	420	80	NTN	Angular Contact Ball Bearings
  AST090 4540	45	50		AST	Plain Bearings
  HJ-688432	107,95	133,35	50,8	KOYO	Needle Roller Bearings
  K 28x35x20	28	35		NBS	Needle Roller Bearings
  QJ 1056 N2MA/C4	420	280	65	SKF	Angular Contact Ball Bearings
  NJ2312	60	130	46	NTN	Cylindrical Roller Bearings
  NNU4934K/W33	170	230	60	CYSD	Cylindrical Roller Bearings
  NUP2319	95	200	67	ISO	Cylindrical Roller Bearings
  R189.02				SNR	Wheel Bearings
  TAFI 91916	9	19	16	IKO	Needle Roller Bearings
  MS16AC	2.2500	5.0000	1.2500	FAG	ANGULAR CONTACT BALL BEARINGS
  BK1816	24		16	FAG	NEEDLE BEARINGS
  MR-28-SS			1.2500	McGill	NEEDLE BEARINGS
  G-34	2.5625	4.0000		Aetna	THRUST BALL BEARINGS
  LT-11E				RHP	THRUST BALL BEARINGS