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31307A - SNR

31307A

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.

Documentation

Product information

PRODUCT DEFINITION
BrandSNR
d - Internal diameter35 mm
D - External diameter80 mm
B - Bearing/Inner ring width21 mm
C - Outer ring width15 mm
T - Total width22,75 mm
d1 - External diameter inner ring59,1 mm
a - Charge load application point25,8 mm
rs - Min fillet radius2 mm
r1s - Min fillet radius1,5 mm
Mass0,517 kg
ISO 355 referenceT7FB035
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PRODUCT PERFORMANCE
C - Dynamic load72,2 kN
A2 - Rating life coefficient1
C0 - Static load77,3 kN
Cu - Fatigue limit load9,4 kN
e - Coefficient0.83
Y0 - Static axial load coefficient0.4
Y2 - Upper axial load coefficient0.73
N ref - Reference thermal speed5500 tr/min
N lim - Mechanical Limit Speed9600 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)6,716 Hz
BPFI - Over rolling frequency on inner (60 rpm)9,284 Hz
BSF - Over rolling frequency on rolling element (60 rpm)5,319 Hz
BRF - Rotational frequency – rolling element (60 rpm)2,66 Hz
FTF - Rotational frequency - cage (60 rpm)0,42 Hz
ABUTMENT
da max - Max shoulder diameter IR44 mm
db min - Min IR shoulder diameter45 mm
Da min - Min shoulder diameter OR62 mm
Da max - Max shoulder diameter OR71,5 mm
Db min - Min OR shoulder diameter76,5 mm
Ca - Min clearance3 mm
Cb - Min clearance7,5 mm
ra max - Max fillet radius2 mm
r1a - Max fillet radius1,5 mm
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