30203A - SNR


Tapered roller bearing, pressed steel cage

The single row tapered roller bearing is available in metric dimensions (ISO 355 and JIS B 1512 standards) and in inches (ABMA standard, metric series including J). The single row in tapered roller bearing range, is the most widely used and is generally mounted in opposition.


Technical datasheet

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d - Internal diameter17 mm
D - External diameter40 mm
B - Bearing/Inner ring width12 mm
C - Outer ring width11 mm
T - Total width13,25 mm
d1 - External diameter inner ring28,5 mm
a - Charge load application point9,9 mm
rs - Min fillet radius1 mm
r1s - Min fillet radius1 mm
Mass0,08 kg
ISO 355 referenceT2DB017
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C - Dynamic load21,7 kN
A2 - Rating life coefficient1
C0 - Static load21,9 kN
Cu - Fatigue limit load2,65 kN
e - Coefficient0.35
Y0 - Static axial load coefficient0.96
Y2 - Upper axial load coefficient1.74
Nref - Reference thermal speed9700 tr/min
Nlim - Mechanical Limit Speed19000 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
BPFO - Characteristic outer ring frequency (60 rpm)6,157 Hz
BPFI - Characteristic inner ring frequency (60 rpm)8,843 Hz
FTF - Characteristic cage frequency (60 rpm)0,41 Hz
BSF - Characteristic rolling element frequency (60 rpm)5,266 Hz
da max - Max shoulder diameter IR23 mm
db min - Min IR shoulder diameter23 mm
Da min - Min shoulder diameter OR34 mm
Da max - Max shoulder diameter OR34 mm
Db min - Min OR shoulder diameter37 mm
Ca - Min clearance2 mm
Cb - Min clearance2 mm
ra max - Max fillet radius1 mm
r1a - Max fillet radius1 mm
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