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30204A - 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 diameter20 mm
D - External diameter47 mm
B - Bearing/Inner ring width14 mm
C - Outer ring width12 mm
T - Total width15,25 mm
d1 - External diameter inner ring33,9 mm
a - Charge load application point11,3 mm
rs - Min fillet radius1 mm
r1s - Min fillet radius1 mm
Mass0,126 kg
ISO 355 referenceT2DB020
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C - Dynamic load29,6 kN
A2 - Rating life coefficient1
C0 - Static load30,6 kN
Cu - Fatigue limit load3,75 kN
e - Coefficient0.35
Y0 - Static axial load coefficient0.96
Y2 - Upper axial load coefficient1.74
Nref - Reference thermal speed10000 tr/min
Nlim - Mechanical Limit Speed17000 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
BPFO - Characteristic outer ring frequency (60 rpm)6,158 Hz
BPFI - Characteristic inner ring frequency (60 rpm)8,842 Hz
FTF - Characteristic cage frequency (60 rpm)0,411 Hz
BSF - Characteristic rolling element frequency (60 rpm)5,274 Hz
da max - Max shoulder diameter IR27 mm
db min - Min IR shoulder diameter25,5 mm
Da min - Min shoulder diameter OR40 mm
Da max - Max shoulder diameter OR41,5 mm
Db min - Min OR shoulder diameter44 mm
Ca - Min clearance2 mm
Cb - Min clearance3 mm
ra max - Max fillet radius1 mm
r1a - Max fillet radius1 mm
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