d - 8 mm

D - 12 mm

B - 3.5 mm

d₁ - - 9 mm

D₂ - - 11.31 mm

r_1,2 - min. - 0.1 mm

d_a - min. - 8.8 mm

d_a - max. - 8.9 mm

D_a - max. - 11.5 mm

r_a - max. - 0.1 mm

Basic dynamic load rating - C - 0.364 kN

Basic static load rating - C₀ - 0.143 kN

Fatigue load limit - P_u - 0.006 kN

Reference speed - 100000 r/min

Limiting speed - 53000 r/min

Calculation factor - k_r - 0.02

Calculation factor - f₀ - 8.2

Mass bearing - 0.0011 kg

• Model Number:W 637/8-2Z
• Inner Diameter：12mm Outer Diameter：8mm Width：3,5mm
• Type：Deep Groove Ball Bearings
• Update date：2025-12-10
• Application:Animal Tracking,enzyme,auto tools,DC generators,roller lathe,Hydraulic Rama,Pneumatic Control Elements,hook,intermediate,food / grain / food equipment,electronic materials
• Similar models:AST 637HZZ SKF W637/4XR-2Z SKF W637-2RS1 AST 637H KOYO 637 SKF W637-2RZ ISO 637-2RS SKF W637/8-2ZS NSK 637ZZ1 NSK 637DD
• BEARING POWER International Trading Co.,Ltd. specialize in W637/8-2Z products，there is large inventory of SKF W 637/8-2Z . We has been built up long-term cooperation with SKF company, could make a bulk order of the W 637/8-2Z Which SKF W637/8-2Z 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
  2222	110	200	53	CX	Self-Aligning Ball Bearings
  33209	45	85	32	CYSD	Tapered Roller Bearings
  5204	20	47	20.6	NACHI	Angular Contact Ball Bearings
  6219-2Z/VA228	170	95	32	SKF	Deep Groove Ball Bearings
  87BIC393	222,25	298,45	38,1	Timken	Deep Groove Ball Bearings
  AXK 6085	85	60	3	SKF	Thrust Roller Bearings
  FWF-121812	12	18		NSK	Needle Roller Bearings
  HM516448/HM516410	82,55	133,35	39,688	KOYO	Tapered Roller Bearings
  LM152220	10	22	20,2	NSK	Needle Roller Bearings
  RF405732A	40	57	31,5	KOYO	Needle Roller Bearings
  RN2212-E-MPBX	60	100	28	FAG	Cylindrical Roller Bearings
  SALKAC22M	22			SKF	Plain Bearings
  SL181872-E	360	440	38	INA	Cylindrical Roller Bearings
  SYR 1 1/2	38,1	62,706	53,975	SKF	Bearing Units
  VE273621AB1	27	36		KOYO	Needle Roller Bearings
  MR-56-SS			2.0000	McGill	NEEDLE BEARINGS
  L10RA700	7.0000	7.6250	.3125	FAG	DEEP GROOVE BALL BEARINGS
  H39/500	500	580		SKF	ADAPTERS
  1221	190	105	36	FED	DEEP GROOVE BALL BEARINGS
  307-S	35	80	21	MRC	DEEP GROOVE BALL BEARINGS