d - 4 mm

D - 9 mm

B - 4 mm

d₁ - - 5.2 mm

D₂ - - 8.1 mm

D₃ - 10.3 mm

C - 1 mm

r_1,2 - min. - 0.1 mm

d_a - min. - 4.6 mm

r_a - max. - 0.1 mm

Basic dynamic load rating - C - 0.364 kN

Basic static load rating - C₀ - 0.114 kN

Fatigue load limit - P_u - 0.005 kN

Limiting speed - 40000 r/min

Calculation factor - k_r - 0.02

Calculation factor - f₀ - 6.5

Mass bearing - 0.0011 kg

• Model Number:W 638/4 R-2RS1
• Inner Diameter：9mm Outer Diameter：4mm Width：4mm
• Type：Deep Groove Ball Bearings
• Update date：2025-12-12
• Application:Handling machinery and various industrial machinery,security equipment,marine analysis,luminescent reagent,sucker industry,plant determination,gear grinding machine,test strip,Reflective Materials Industrial fabrics,Medium and large motor,equipment and
• Similar models:SKF W63801 ISB F63802ZZ SKF W638/4-2RS1 SKF W63803-2Z SKF W638/5R-2RS1 SKF W638/4R-2RS1 ISO 63802-2RS ISO 63800-2RS SKF W63805-2RZ SKF W638/2.5R-2Z
• BEARING POWER International Trading Co.,Ltd. specialize in W638/4R-2RS1 products，there is large inventory of SKF W 638/4 R-2RS1 . We has been built up long-term cooperation with SKF company, could make a bulk order of the W 638/4 R-2RS1 Which SKF W638/4R-2RS1 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
  22260-K-MB	300	540	140	FAG	Spherical Roller Bearings
  24156MBK30W33	280	460	180	AST	Spherical Roller Bearings
  40BER29SV1V	40	62	14	NSK	Angular Contact Ball Bearings
  423060	300	460	148	NTN	Tapered Roller Bearings
  455S/453X	50,8	104,775	30,162	ISO	Tapered Roller Bearings
  52210	40	78	39	NKE	Thrust Ball Bearings
  698-2RS	8	19	6	ISO	Deep Groove Ball Bearings
  E32013J	65	100	23	NACHI	Tapered Roller Bearings
  EE435102/435165D+A	260,35	419,1	184,15	NTN	Tapered Roller Bearings
  NJ 218 E	90	160	30	NACHI	Cylindrical Roller Bearings
  NNU6020 V	100	150	90	CX	Cylindrical Roller Bearings
  RTUEY20	20			NKE	Bearing Units
  UKP217H	75			SNR	Bearing Units
  VKBA7469	43	78	44	SKF	Angular Contact Ball Bearings
  VKHB 2158	85,000	140,000	41,000	SKF	Wheel Bearings
  215.2ZR	75	130	25	FAG	DEEP GROOVE BALL BEARINGS
  350-CDS	50	110	27	HOFF	ANGULAR CONTACT BALL BEARINGS WITH SPLIT INNER RACE
  R7190	7	19	6	RMB	DEEP GROOVE BALL BEARINGS
  70/560MG	560	820	115	CONSOLIDATED	ANGULAR CONTACT BALL BEARINGS
  KG-200CPO-2RS	20.0000	22.0000	1.0000	CONSOLIDATED	DEEP GROOVE BALL BEARINGS