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：2025-04-27
• Application:crimping tools,food add,Safety protection,plastic rolling,climb ladder,Equipment,switch,medical equipment,position switch,sawing machine,rock drilling machinery
• Similar models:SKF W638/4-2RS1 SKF W638-2Z ISO 63802ZZ NSK 638ZZ1 ZEN S638-2RS NSK 638VV SKF 638-RZ SKF W63800R-2RS1 SKF W63805 SKF W638/2R-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
  32222J2/DF	110	200	112	SKF	Tapered Roller Bearings
  3NCHAC032CA	160	240	38	KOYO	Angular Contact Ball Bearings
  B-2420	38,1	47,625	31,75	Timken	Needle Roller Bearings
  BA470-1	470	570	50	NSK	Angular Contact Ball Bearings
  BDZ56-2	56	84	25	NSK	Deep Groove Ball Bearings
  K15X21X15	15	21		Timken	Needle Roller Bearings
  N30/530 E	530	780	185	CX	Cylindrical Roller Bearings
  NP19/850	850	1120	118	ISO	Cylindrical Roller Bearings
  RS-5068	340	520	243	NSK	Cylindrical Roller Bearings
  TUP2 25.15	25	28		CX	Plain Bearings
  RF-56-PP	1.1250	3.5000	2.0625	INA	NEEDLE BEARINGS
  H307	35	52		FAG	ADAPTERS
  6205Z	25	52	15	FAG	DEEP GROOVE BALL BEARINGS
  XLM22	42	22		HOFF	THRUST BALL BEARINGS
  105TAC20X	105	160	234421 M.SP	NSK	ANGULAR CONTACT THRUST BALL BEARINGS
  88008	8	24	.3149	CONSOLIDATED	DEEP GROOVE BALL BEARINGS
  45x58x7mm	45	58	7	CONSOLIDATED	OIL SEALS
  58x65x3.5mm	58	65	3.5	CONSOLIDATED	OIL SEALS
  24130-2RS	150	250	100	CONSOLIDATED	SPHERICAL ROLLER BEARINGS
  NATV-20	20	47	25	CONSOLIDATED	NEEDLE BEARINGS