(dimensions in mm)

Bearing Type - Open

Bore Dia (d) - 8.0000

Outer Dia (D) - 28.0000

Width (B) - 9.0000

Radius (min) (rs) - 0.300

Dynamic Load Rating (Cr) - 3,879

Static Load Rating (Cor) - 1,586

Max Speed (Grease) (X1000 RPM) - 28

Max Speed (Oil) (X1000 RPM) - 34

Max. Shaft Shoulder Dia. Inner (Li) - 14.5

Min. Housing Shoulder Dia., Outer (Lo) - 21.3

Ball Qty - 7

Ball Dia (Dw) - 4.7620

Weight (g) - 28.10

Precision - A1

Standard Clearance - K25

Material - Martensitic Stainless Steel

Also available in 52100 Chrome Steel

ABEC Grades 1, 3, 5, 7, and 9 are available. Also, the equivalent ISO classes.

• Model Number:638H
• Inner Diameter：8mm Outer Diameter：28mm Width：9mm
• Type：Deep Groove Ball Bearings
• Update date：2025-12-12
• Application:Perfusion device,rehabilitation training equipment,noise reduction equipment,equipment,Industry,drawing die,impression material,standing experimental equipment,Food testing,food / grain / food equipment,medical equipment
• Similar models:FBJ 1638 KBC 638ZZ SKF W63803-2Z SKF W638/4X-2RS1 SKF W638-2RZ FBJ 1638-2RS ZEN 638 SKF W63801 SKF W638/8-2Z ZEN 63801-2Z
• BEARING POWER International Trading Co.,Ltd. specialize in 638H products，there is large inventory of AST 638H . We has been built up long-term cooperation with AST company, could make a bulk order of the 638H Which AST 638H 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
  14X30210C	52	90	21,75	SNR	Tapered Roller Bearings
  23044 EKW33+AOH3044	200	340	90	ISB	Spherical Roller Bearings
  23988 KCW33+H3988	440	600	118	CX	Spherical Roller Bearings
  6006-Z-NR	30	55	13	NKE	Deep Groove Ball Bearings
  ARXJ61.8X86X3.9	61,880	86,000	3,985	NTN	Needle Roller Bearings
  DG4590LTSHCS14	45	90	20	KOYO	Deep Groove Ball Bearings
  GEZ 38 ES 2RS	38,1	61,91	33,33	ISB	Plain Bearings
  NF424	120	310	72	KOYO	Cylindrical Roller Bearings
  NK43/20	43	53	20	CX	Needle Roller Bearings
  NKXR 20	20	30	30	CX	Complex Bearings
  NUP10/500	500	720	100	NTN	Cylindrical Roller Bearings
  RF-1340	4	13	5	NMB	Deep Groove Ball Bearings
  HF-0406KF	8		6	INA	NEEDLE BEARINGS
  SAF056	10.0000			FAG	PILLOW BLOCKS
  AZ609526			11.0	IKO	THRUST ROLLER BEARINGS
  UCSP206-18S6H1	1.1250			FYH	STAINLESS STEEL PILLOW BLOCKS
  R-1970ZZ	7	19	6	NMB	DEEP GROOVE BALL BEARINGS
  U-30226	130	230	40	New Departure	ANGULAR CONTACT BALL BEARINGS
  40TP116				Torrington	THRUST ROLLER BEARINGS
  W-5/8				CONSOLIDATED	THRUST BALL BEARINGS