d - 8 mm

D - 28 mm

B - 6 mm

C - 6 mm

d1 - 14,8 mm

d2 - – mm

r1 min. - 10,4 mm

r2 min. - 10,4 mm

D1 - 22,6 mm

D2 - 0,3 mm

da min. - 14,7 mm

Da max. - 25,6 mm

ra max. - 0,3 mm

Weight - 0,03 Kg

Basic dynamic load rating (C) - 1,33 kN

Basic static load rating (C0) - 0,57 kN

Fatigue load limit (Pu) - 0,024

Reference speed - 60000 r/min

Limiting speed - 30000 r/min

Calculation factor (f0) - 12

Calculation factor (kr) - 0,03

• Model Number: 638-RZ
• Inner Diameter：8mm Outer Diameter：28mm Width：6mm
• Type：Deep Groove Ball Bearings
• Update date：2025-12-11
• Application:Processing machinery,vacuum filter,expectoration machine,aerial work platform,CNC,flexible processing,disposable,experimental equipment,Liposuction device,pump industry,packaging machinery
• Similar models:SKF W638/2X-2Z NSK 638DD SKF W63802R SKF W63800R-2RS1 SKF W638/5-2Z ZEN 638-2Z ISB SS638/8-ZZ ISO 63800-2RS SKF 638/5-2Z SKF W638/5-2RS1
• BEARING POWER International Trading Co.,Ltd. specialize in 638-RZ products，there is large inventory of SKF 638-RZ . We has been built up long-term cooperation with SKF company, could make a bulk order of the 638-RZ Which SKF 638-RZ 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
  23164 EKW33+OH3164	300	540	176	ISB	Spherical Roller Bearings
  305803 C-2Z	17	47	17,5	SKF	Deep Groove Ball Bearings
  6938				Ruville	Wheel Bearings
  E2.22211	55	100	25	SKF	Spherical Roller Bearings
  JP16049/10	160	220	32	CX	Tapered Roller Bearings
  NUP2340 E	200	420	138	CX	Cylindrical Roller Bearings
  RNA6906-XL	35	47	30	INA	Needle Roller Bearings
  UK318+H2318	90	190	63	NACHI	Deep Groove Ball Bearings
  UKFL216	70			KOYO	Bearing Units
  W 6008-2Z	68	40	15	SKF	Deep Groove Ball Bearings
  WBK25DF-31	25	90		NSK	Thrust Ball Bearings
  NJ2305E	25	62	24	FAG	CYLINDRICAL ROLLER BEARINGS
  XLRJ4E	4.0000	5.6250	.8750	RHP	CYLINDRICAL ROLLER BEARINGS
  MR-44-SS			1.7500	McGill	NEEDLE BEARINGS
  180318	1.1250	1.5000	1.1250	BAL	JOURNAL ROLLER ASSEMBLIES
  AT-766				Rollway	THRUST ROLLER BEARING WITH SPHERICAL SEATING RING
  NPL-23	1.4375			Sealmaster	PILLOW BLOCKS
  6019.2Z	95	145	24	STEYR	DEEP GROOVE BALL BEARINGS
  NU-2215	75	130	31	CONSOLIDATED	CYLINDRICAL ROLLER BEARINGS
  GE-380ES	380	520	190	CONSOLIDATED	SPHERICAL PLAIN BEARINGS