Bearing number	NATB 5903	NKIA5903A	NATA 5903
Size (mm)	17x30x20(mm)	17x30x18(mm)	17x30x18(mm)
Brand	IKO	NTN	IKO
Bore Diameter (mm)	17(mm)	17,000(mm)	17(mm)
Outer Diameter (mm)	30(mm)	30,000(mm)	30(mm)
Width (mm)	20(mm)	18,000(mm)	18(mm)
d	17 mm 0.6693 in	17,000 mm 0.6693 in	17 mm 0.6693 in
Fw	22 mm 0.8661 in		22 mm 0.8661 in
D	30 mm 1.1811 in	30,000 mm 1.1811 in	30 mm 1.1811 in
B	20 mm 0.7874 in	18,000 mm 0.7087 in	18 mm 0.7087 in
C	18 mm 0.7087 in	18,000 mm 0.7087 in	18 mm 0.7087 in
r min.	0,3 mm 0.0118 in		0,3 mm 0.0118 in
da min.	19 mm 0.748 in		19 mm 0.748 in
Da max.	28 mm 1.1024 in		28 mm 1.1024 in
Weight	0,0585 Kg		0,0555 Kg
Dynamic load rating radial (C)	8,22 kN		8,22 kN
Dynamic load rating axial (C)	2,05 kN		2,05 kN
Static load rating radial (C0)	11,5 kN		11,5 kN
Static load rating axial (C0)	3,34 kN		3,34 kN