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Single row tapered roller bearings

31313A - SNR

31313A

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 diameter65 mm
D - External diameter140 mm
B - Bearing/Inner ring width33 mm
C - Outer ring width23 mm
T - Total width36 mm
d1 - External diameter inner ring102,9 mm
a - Charge load application point44,3 mm
rs - Min fillet radius3 mm
r1s - Min fillet radius2,5 mm
Mass2,35 kg
ISO 355 referenceT7GB065
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PRODUCT PERFORMANCE
C - Dynamic load181 kN
A2 - Rating life coefficient1
C0 - Static load203 kN
Cu - Fatigue limit load39,6 kN
e - Coefficient0.83
Y0 - Static axial load coefficient0.4
Y2 - Upper axial load coefficient0.73
N ref - Reference thermal speed3500 tr/min
N lim - Mechanical Limit Speed5100 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)6,718 Hz
BPFI - Over rolling frequency on inner (60 rpm)9,282 Hz
BSF - Over rolling frequency on rolling element (60 rpm)5,328 Hz
BRF - Rotational frequency – rolling element (60 rpm)2,664 Hz
FTF - Rotational frequency - cage (60 rpm)0,42 Hz
ABUTMENT
da max - Max shoulder diameter IR79 mm
db min - Min IR shoulder diameter79 mm
Da min - Min shoulder diameter OR111 mm
Da max - Max shoulder diameter OR128 mm
Db min - Min OR shoulder diameter132 mm
Ca - Min clearance5 mm
Cb - Min clearance13 mm
ra max - Max fillet radius2,5 mm
r1a - Max fillet radius2 mm
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