d - 17 mm

Fw - 22 mm

D - 30 mm

B - 13 mm

C - 13 mm

r min. - 0,3 mm

da min. - 19 mm

Da max. - 28 mm

ra max. - 0,3 mm

Weight - 0,038 Kg

Basic dynamic load rating (C) - 11,6 kN

Basic static load rating (C0) - 15,4 kN

(Grease) Lubrication Speed - 12000 r/min

(Oil) Lubrication Speed - 20000 r/min

• Model Number: NA4903
• Inner Diameter：17mm Outer Diameter：30mm Width：13mm
• Type：Needle Roller Bearings
• Update date：2025-04-20
• Application:Small air generators,electric pump,electrostatic protection,Internal thread type,Vertical machining,wall industry,position switch,Laser Devices,food packaging,Infrared Technology,reducer
• Similar models:KOYO RNA4903 KOYO NA4903,2RS NBS RNA4903RS AST RNA4903 IKO NA4903 KOYO NA4903 INA NA4903-2RSR JNS RNA4903M ISO RNA4903-2RS NBS RNA4903
• BEARING POWER International Trading Co.,Ltd. specialize in NA4903 products，there is large inventory of NSK NA4903 . We has been built up long-term cooperation with NSK company, could make a bulk order of the NA4903 Which NSK NA4903 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
  2313	65	140	48	AST	Self-Aligning Ball Bearings
  61980-MA	400	540	65	NKE	Deep Groove Ball Bearings
  6204T1XVV	20	47	14	NSK	Deep Groove Ball Bearings
  89315-TV	75	135	36	INA	Thrust Roller Bearings
  9116K	80	125	22	Timken	Deep Groove Ball Bearings
  F61801-2Z	12	21	5	ZEN	Deep Groove Ball Bearings
  L281149D/L281110/L281110DG2	660,4	812,8	365,125	NTN	Tapered Roller Bearings
  RSAO60	60			INA	Bearing Units
  N215	75	130	25	KOYO	Cylindrical Roller Bearings
  NJ3030	150	225	56	ISO	Cylindrical Roller Bearings
  NU 30/600 ECMA/HA1	870	600	200	SKF	Cylindrical Roller Bearings
  SFR166-2TS	4,763	9,525	3,175	ZEN	Deep Groove Ball Bearings
  UCST210H1S6	50			KOYO	Bearing Units
  B1	1.2187	.5000		INA	THRUST BALL BEARINGS
  6M10ZZ	6	10	3	Nachi	DEEP GROOVE BALL BEARINGS
  YAR205-014	.8750	2.0470	.7080	SKF	PILLOW BLOCKS
  51417				SKF	THRUST BALL BEARINGS
  3310	50	110	27	New Departure	DEEP GROOVE BALL BEARINGS
  NM15	1.8750	4.5000	1.0625	STEYR	CYLINDRICAL ROLLER BEARINGS
  SN-518..22218-K	80		100	CONSOLIDATED	PILLOW BLOCKS