NA6903R NTN Needle Roller Bearings

NA6903R NTN Needle Roller Bearings

Name	NA6903R	RNA6903R	RNA6903
Brand	NTN	NTN	CX
rs min	0.3 mm 0.0118 in	0.3 mm 0.0118 in
s max	1 mm 0.0394 in
Dw	2.5 mm 0.0984 in	2.5 mm 0.0984 in
Lw	17.8 mm 0.7008 in	17.8 mm 0.7008 in
Lubrication hole on outer ring	Oui/Yes	Oui/Yes
k	2 mm 0.0787 in	2.5 mm 0.0984 in
Lubrication hole on inner ring	Non/No
Radial clearance class	CN	CN
Precision class	P0	P0
Mass	0.07 kg	0.04 kg
Cr	18.2 kN	18.2 kN
C0r	27.2 kN	27.2 kN
Nlim (grease)	12,000 rpm	12,000 rpm
Nlim (oil)	18,000 rpm	18,000 rpm
Min operating temperature, Tmin	-20 °C	-20 °C
Max operating temperature, Tmax	120 °C	120 °C
Characteristic cage frequency, FTF	0.45 Hz	0.45 Hz
Characteristic rolling element frequency, BSF	9.7 Hz	9.7 Hz
Characteristic outer ring frequency, BPF0	3.82 Hz	7.63 Hz
Characteristic inner ring frequency, BPFI	4.68 Hz	9.37 Hz
da min	19 mm 0.748 in
Da max	28 mm 1.1024 in	28 mm 1.1024 in
ras max	0.3 mm 0.0118 in	0.3 mm 0.0118 in
Size (mm)	17x30x23(mm)	22x30x23(mm)	22x30x23(mm)
Bore Diameter (mm)	17(mm)	22(mm)	22(mm)
Outer Diameter (mm)	30(mm)	30(mm)	30(mm)
Width (mm)	23(mm)	23(mm)	23(mm)
d	17 mm 0.6693 in
F	22 mm 0.8661 in
D	30 mm 1.1811 in	30 mm 1.1811 in	30 mm 1.1811 in
B	23 mm 0.9055 in
C	23 mm 0.9055 in	23 mm 0.9055 in	23 mm 0.9055 in
r min.	0,3 mm 0.0118 in	0,3 mm 0.0118 in
s	1 mm 0.0394 in
da min.	19 mm 0.748 in
Da max.	28 mm 1.1024 in	28 mm 1.1024 in
ra max.	0,3 mm 0.0118 in	0,3 mm 0.0118 in
Weight	0,069 Kg	0,042 Kg	0,042 Kg
Basic dynamic load rating (C)	18,2 kN	18,2 kN	18,7 kN
Basic static load rating (C0)	27,2 kN	27,2 kN	30,5 kN
(Grease) Lubrication Speed	12 000 r/min	12000 r/min	12000 r/min
Category	Bearings	Roller Bearings
BDI Inventory	0.0	0.0
Manufacturer Name	NTN	NTN
Minimum Buy Quantity	N/A	N/A
Weight / Kilogram	0.073	0.041
Product Group - BDI	B04144	B04144

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