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 4903

NA 4903

Dimensions

d		17	mm
D		30	mm
B		13	mm
F		22	mm
r_1,2	min.	0.3	mm
s	max.	0.5	mm

Abutment dimensions

d_a	min.	19	mm
D_a	max.	28	mm
r_a	max.	0.3	mm

Calculation data

Basic dynamic load rating	C	11.4	kN
Basic static load rating	C₀	16.3	kN
Fatigue load limit	P_u	1.96	kN
Reference speed		18000	r/min
Limiting speed		20000	r/min

Mass

Mass bearing

0.038

Model Number: NA 4903
Inner Diameter：17mm Outer Diameter：30mm Width：13mm
Reference speed:20000 r/min Limiting speed:18000 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：2026-06-24
Application:diving equipment,Logistics Equipment,pump accessories,E Beauty,security equipment,sterilizers,Plastic molding,stamping die and its equipment,sleep monitoring,industrial skin care,Medical room equipment
Similar models:NA 4903.2RS NA 4903 RS RNA 4903 NA 4903 RNA 4903.2RS
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Model No. Inner Diameter Outer Diameter Width Type

71952 ACD/P4A
99386
HE 316 E
NN 3080 K/SPW33
W 638/4 R-2Z

Purchase the SKF NA 4903 Needle roller bearings, with machined rings, with an inner ring Please fill in the following

Hot number： 29260 29413 E 51405 7007 ACD/HCP4A 71812 CD/P4 71917 CE/HCP4A C 41/670 MB HA 210 K 40x45x13 NUP 315 ECML OKC 150 PCMF 252811.5 E SAF 22244 SAF 22622 x 3.13/16 SYE 2 1/2 3

Model No.	Inner Diameter	Outer Diameter	Width	Type
71952 ACD/P4A
99386
HE 316 E
NN 3080 K/SPW33
W 638/4 R-2Z