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30306A - 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 diameter30 mm
D - External diameter72 mm
B - Bearing/Inner ring width19 mm
C - Outer ring width16 mm
T - Total width20,75 mm
d1 - External diameter inner ring49,2 mm
a - Charge load application point15,4 mm
rs - Min fillet radius1,5 mm
r1s - Min fillet radius1,5 mm
Mass0,387 kg
ISO 355 referenceT2FB030
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C - Dynamic load62,1 kN
A2 - Rating life coefficient1
C0 - Static load63,6 kN
Cu - Fatigue limit load7,8 kN
e - Coefficient0.32
Y0 - Static axial load coefficient1.05
Y2 - Upper axial load coefficient1.9
Nref - Reference thermal speed7100 tr/min
Nlim - Mechanical Limit Speed11000 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
BPFO - Characteristic outer ring frequency (60 rpm)5,604 Hz
BPFI - Characteristic inner ring frequency (60 rpm)8,396 Hz
FTF - Characteristic cage frequency (60 rpm)0,4 Hz
BSF - Characteristic rolling element frequency (60 rpm)4,713 Hz
da max - Max shoulder diameter IR40 mm
db min - Min IR shoulder diameter38,5 mm
Da min - Min shoulder diameter OR62 mm
Da max - Max shoulder diameter OR63,5 mm
Db min - Min OR shoulder diameter66 mm
Ca - Min clearance3 mm
Cb - Min clearance4,5 mm
ra max - Max fillet radius1,5 mm
r1a - Max fillet radius1,5 mm
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