Bearings, units and housings -- Roller bearings -- Needle roller bearings -- Needle roller bearings with machined rings -- Needle roller bearings, with machined rings, with an inner ring SKF NA 4904

NA 4904

Dimensions

d		20	mm
D		37	mm
B		17	mm
F		25	mm
r_1,2	min.	0.3	mm
s	max.	0.8	mm

Abutment dimensions

d_a	min.	22	mm
D_a	max.	35	mm
r_a	max.	0.3	mm

Calculation data

Basic dynamic load rating	C	21.6	kN
Basic static load rating	C₀	28	kN
Fatigue load limit	P_u	3.35	kN
Reference speed		15000	r/min
Limiting speed		17000	r/min

Mass

Mass bearing

0.075

Model Number: NA 4904
Inner Diameter：20mm Outer Diameter：37mm Width：17mm
Reference speed:17000 r/min Limiting speed:15000 r/min
Type：Bearings, units and housings Roller bearings Needle roller bearings Needle roller bearings with machined rings
Details： Needle roller bearings with machined rings Needle roller bearings, with machined rings, with an inner ring
Update date：2026-08-24
Application:wire industry,chamfer,Vertical machining,gear type,garbage disposal,medical equipment,instrumentation instrument,circulating pump,Insect Count,Chromatography Products,shaft milling machine
Similar models:RNA 4904 NA 4904 RNA 4904 RS RNA 4904.2RS NA 4904.2RS
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Model No. Inner Diameter Outer Diameter Width Type

216-ZNR
32x52x8 HMS5 RG
BEAM 050140-2RZ
FYTB 15/16 RM
WS 81168

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Model No.	Inner Diameter	Outer Diameter	Width	Type
216-ZNR
32x52x8 HMS5 RG
BEAM 050140-2RZ
FYTB 15/16 RM
WS 81168