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30304A - SNR

30304A

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 diameter20 mm
D - External diameter52 mm
B - Bearing/Inner ring width15 mm
C - Outer ring width13 mm
T - Total width16,25 mm
d1 - External diameter inner ring34,7 mm
a - Charge load application point11,3 mm
rs - Min fillet radius1,5 mm
r1s - Min fillet radius1,5 mm
Mass0,165 kg
ISO 355 referenceT2FB020
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PRODUCT PERFORMANCE
C - Dynamic load36,3 kN
A2 - Rating life coefficient1
C0 - Static load33,2 kN
Cu - Fatigue limit load4,05 kN
e - Coefficient0.3
Y0 - Static axial load coefficient1.1
Y2 - Upper axial load coefficient2
N ref - Reference thermal speed8200 tr/min
N lim - Mechanical Limit Speed15000 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)5,125 Hz
BPFI - Over rolling frequency on inner (60 rpm)7,875 Hz
BSF - Over rolling frequency on rolling element (60 rpm)4,429 Hz
BRF - Rotational frequency – rolling element (60 rpm)2,215 Hz
FTF - Rotational frequency - cage (60 rpm)0,394 Hz
ABUTMENT
da max - Max shoulder diameter IR28 mm
db min - Min IR shoulder diameter28,5 mm
Da min - Min shoulder diameter OR42,5 mm
Da max - Max shoulder diameter OR43,5 mm
Db min - Min OR shoulder diameter47,5 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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