d - 8 mm

D - 28 mm

B - 9 mm

C - 9 mm

r min. - 0,3 mm

db max. - 12,8 mm

Db min. - 22,8 mm

rb max. - 0,3 mm

Weight - 0,0286 Kg

Basic dynamic load rating (C) - 4,55 kN

Basic static load rating (C0) - 1,97 kN

(Grease) Lubrication Speed - 22 000 r/min

• Model Number: 638 DD
• Inner Diameter：8mm Outer Diameter：28mm Width：9mm
• Type：Deep Groove Ball Bearings
• Update date：2025-12-17
• Application:defogging and degreasing,Roller,sawing machine,safety testing,Machine tools,non-ferrous metal alloy,floor industry,fabric products,universal category,,packaging machinery
• Similar models:SKF W63805R KBC 638ZZ SKF W63803-2Z SKF W638/5-2Z ISO 63800ZZ SKF W638/8-2Z NSK 638DD SKF W63800R-2Z ISB 638 SKF W63805
• BEARING POWER International Trading Co.,Ltd. specialize in 638DD products，there is large inventory of NSK 638 DD . We has been built up long-term cooperation with NSK company, could make a bulk order of the 638 DD Which NSK 638DD 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.

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  6208ZZ	40	80	18	KBC	Deep Groove Ball Bearings
  6306-2RS2	30	72	19	NKE	Deep Groove Ball Bearings
  6314-2RU	70	150	35	KOYO	Deep Groove Ball Bearings
  6322	110	240	50	ISB	Deep Groove Ball Bearings
  7014 C-UX	70	110	40	CX	Angular Contact Ball Bearings
  7015CVUJ74	75	115	20	SNR	Angular Contact Ball Bearings
  8E-NK1-25X56.4X19-3	25	56,4	19	NTN	Needle Roller Bearings
  BA 812 Z	12,7	17,462	19,05	IKO	Needle Roller Bearings
  BL 218	90	160	30	NSK	Deep Groove Ball Bearings
  NK50/25	50	62	25	KOYO	Needle Roller Bearings
  NU29/1060	1060	1400	195	PSL	Cylindrical Roller Bearings
  STF725RV1012g	725	1000	700	NSK	Cylindrical Roller Bearings
  63006-2RS	30	55	19	FAG	DEEP GROOVE BALL BEARINGS
  7511/500SP.P5				FAG	ANGULAR CONTACT THRUST BALL BEARINGS
  BL309ZZ	45	100	25	NTN	DEEP GROOVE BALL BEARINGS
  NN-3096-KMSP/5	480	700	165	CONSOLIDATED	CYLINDRICAL ROLLER BEARINGS