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：2025-12-09
• Application:impression material,Gear grinding machine,static control,air purification,Animal Tracking,luminescent reagent,journal lathe,generator,wall industry,stirrer,pressure control valve
• Similar models:SKF W63801R-2Z CYSD 1638-RS ISB SS638/8-ZZ SKF W638/8R-2Z SKF W638/5-2Z ISO 63802-2RS SKF W63806R-2Z ISO 638 ISB F63801ZZ SKF W63805R
• 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
  249/1000-MB-W33	1000	1320	315	NKE	Spherical Roller Bearings
  2P8802K	440,000	790,000	285,000	NTN	Thrust Roller Bearings
  30313	65	140	36	NTN	Tapered Roller Bearings
  368A/362X/Q	50,8	90	25	SKF	Tapered Roller Bearings
  3775/3720	50,8	93,264	30,162	Timken	Tapered Roller Bearings
  619/2	2	6	2,3	CX	Deep Groove Ball Bearings
  6328	140	300	62	NTN	Deep Groove Ball Bearings
  7004CDF	20	42	12	NACHI	Angular Contact Ball Bearings
  7022UDBTP4	110	170	84	NTN	Angular Contact Ball Bearings
  BT4B 330650 E/C500	546,1	406,4	288,925	SKF	Tapered Roller Bearings
  E-4R20002	1000	1360	800	NTN	Cylindrical Roller Bearings
  F-FLWA674ASSA	4,000	7,000	2,500	NTN	Deep Groove Ball Bearings
  HSS71908-E-T-P4S	40	62	12	FAG	Angular Contact Ball Bearings
  KT 7108N	7	10		IKO	Needle Roller Bearings
  NJ2310	50	110	40	FBJ	Cylindrical Roller Bearings
  SYM 1.11/16 TF	42,862			SKF	Bearing Units
  UCF208	40			FYH	Bearing Units
  NAXK10Z	19	10		FAG	NEEDLE BEARINGS
  B709C.T.P4S	9	24	7	FAG	ANGULAR CONTACT BALL BEARINGS
  HK-1010	14		10	CONSOLIDATED	NEEDLE BEARINGS