d - 20 mm

Fw - 25 mm

D - 37 mm

B - 17 mm

C - 17 mm

r5 min. - 0,3 mm

S - 1,5 mm

Weight - 0,084 Kg

Basic dynamic load rating (C) - 21,3 kN

Basic static load rating (C0) - 25,5 kN

(Grease) Lubrication Speed - 18000 r/min

(Oil) Lubrication Speed - 12000 r/min

• Model Number:NA4904
• Inner Diameter：20mm Outer Diameter：37mm Width：17mm
• Type：Needle Roller Bearings
• Update date：2026-01-13
• Application:plastic molding,training beds etc,Technical Equipment,car shock absorber,enzyme,wire industry,labor insurance,Other machinery,medical equipment,Hair styling device,electromagnet
• Similar models:KOYO RNA4904RS JNS RNA4904M CRAFT NA4904 NBS NA4904 CX RNA4904-2RS AST RNA4904 KOYO NA4904,2RS NBS RNA4904RS IKO NA4904 NTN RNA4904L
• BEARING POWER International Trading Co.,Ltd. specialize in NA4904 products，there is large inventory of KOYO NA4904 . We has been built up long-term cooperation with KOYO company, could make a bulk order of the NA4904 Which KOYO NA4904 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
  28580R/28523	50,8		25,4	KOYO	Tapered Roller Bearings
  23956K	280	380	75	NTN	Spherical Roller Bearings
  31326 A	130	280	72	CX	Tapered Roller Bearings
  6014 NR	70	110	20	ISB	Deep Groove Ball Bearings
  6318-2RS	90	190	43	ISO	Deep Groove Ball Bearings
  BK2218L	22	28	18	NTN	Needle Roller Bearings
  EE720128/720236	325,438	596,9	136,525	Timken	Tapered Roller Bearings
  GE 045 ES-2RS	45	68	32	CX	Plain Bearings
  HR30324J	120	260	59,5	NSK	Tapered Roller Bearings
  K25X31X20	25	31	20	CX	Needle Roller Bearings
  K06x09x10	6	9	10	CX	Needle Roller Bearings
  LUNE 50	50			SKF	Linear Bearings
  S71916 ACE/HCP4A	80	110	16	SKF	Angular Contact Ball Bearings
  UC317	85	180	96	CX	Deep Groove Ball Bearings
  AT-748				Rollway	THRUST ROLLER BEARING WITH SPHERICAL SEATING RING
  5206	30	62	23.8	New Departure	DOUBLE ROW ANGULAR CONTACT BALL BEARINGS
  E-8	8	24	7	CONSOLIDATED	MAGNETO BEARINGS
  NUP-2308E	40	90	33	CONSOLIDATED	CYLINDRICAL ROLLER BEARINGS
  KG-120XPO	12.0000	14.0000	1.0000	CONSOLIDATED	FOUR POINT ANGULAR CONTACT BALL BEARINGS
  TPSY-20SD	20			CONSOLIDATED	THERMOPLASTIC PILLOW BLOCKS