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：2025-12-11
• Application:medical equipment,cleaners,Cutting Machine,supporting facilities,forming machine,Animal Tracking,miscellaneous instruments,plastic blow molding,X-ray Equipment,laser devices,Gripper Swing
• Similar models:KOYO 637 ISO 637ZZ ISO 637-2RS SKF W637/5X-2ZS ISB SS637/3-ZZ ISO 637 SKF W637-2RZ SKF W637/4X FBJ 637ZZ SKF W637/4XR-2Z
• 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
  232/850CAKE4	850	1500	515	NSK	Spherical Roller Bearings
  6307	35	80	21	NTN	Deep Groove Ball Bearings
  7010 CDF	50	80	32	ISO	Angular Contact Ball Bearings
  EE170950/171450	241,3	368,3	50,8	NTN	Tapered Roller Bearings
  E33110J	50	85	26	NACHI	Tapered Roller Bearings
  EXFE201	12			SNR	Bearing Units
  GAC 190 SP	190	290	64	ISB	Plain Bearings
  K20X24X8F	20	24		Timken	Needle Roller Bearings
  KZK 14x18x10	14	18		NBS	Needle Roller Bearings
  NN3088K	440	596	157	PSL	Cylindrical Roller Bearings
  NP 222	110	178.5		NACHI	Cylindrical Roller Bearings
  NP28/850	850	1030	106	CX	Cylindrical Roller Bearings
  RCJT25-N	25			NKE	Bearing Units
  RLS12-2RS	38,1	82,55	19,05	ZEN	Deep Groove Ball Bearings
  RNA 495	6	12	10	IKO	Needle Roller Bearings
  X30226M/Y30226M	130	230	43,75	Timken	Tapered Roller Bearings
  SS7206 ACD/HCP4A	30	62	16	SKF	Angular Contact Ball Bearings
  UCIP209-26	41,275		49,2	KOYO	Bearing Units
  9117K	85	130	22	FAF	DEEP GROOVE BALL BEARINGS
  16044	220	340	37	SKF	DEEP GROOVE BALL BEARINGS