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30207A - 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 diameter35 mm
D - External diameter72 mm
B - Bearing/Inner ring width17 mm
C - Outer ring width15 mm
T - Total width18,25 mm
d1 - External diameter inner ring52,3 mm
a - Charge load application point15,4 mm
rs - Min fillet radius1,5 mm
r1s - Min fillet radius1,5 mm
Mass0,331 kg
ISO 355 referenceT3DB035
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C - Dynamic load56 kN
A2 - Rating life coefficient1
C0 - Static load62,4 kN
Cu - Fatigue limit load7,6 kN
e - Coefficient0.37
Y0 - Static axial load coefficient0.88
Y2 - Upper axial load coefficient1.6
Nref - Reference thermal speed6300 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)7,121 Hz
BPFI - Characteristic inner ring frequency (60 rpm)9,879 Hz
FTF - Characteristic cage frequency (60 rpm)0,419 Hz
BSF - Characteristic rolling element frequency (60 rpm)5,822 Hz
da max - Max shoulder diameter IR44 mm
db min - Min IR shoulder diameter43,5 mm
Da min - Min shoulder diameter OR62 mm
Da max - Max shoulder diameter OR63,5 mm
Db min - Min OR shoulder diameter67 mm
Ca - Min clearance3 mm
Cb - Min clearance3 mm
ra max - Max fillet radius1,5 mm
r1a - Max fillet radius1,5 mm
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