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30308A - SNR

30308A

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 diameter40 mm
D - External diameter90 mm
B - Bearing/Inner ring width23 mm
C - Outer ring width20 mm
T - Total width25,25 mm
d1 - External diameter inner ring63,3 mm
a - Charge load application point19,6 mm
rs - Min fillet radius2 mm
r1s - Min fillet radius1,5 mm
Mass0,748 kg
ISO 355 referenceT2FB040
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PRODUCT PERFORMANCE
C - Dynamic load100 kN
A2 - Rating life coefficient1
C0 - Static load108 kN
Cu - Fatigue limit load13,2 kN
e - Coefficient0.35
Y0 - Static axial load coefficient0.96
Y2 - Upper axial load coefficient1.74
N ref - Reference thermal speed5700 tr/min
N lim - Mechanical Limit Speed8400 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)6,569 Hz
BPFI - Over rolling frequency on inner (60 rpm)9,431 Hz
BSF - Over rolling frequency on rolling element (60 rpm)5,273 Hz
BRF - Rotational frequency – rolling element (60 rpm)2,637 Hz
FTF - Rotational frequency - cage (60 rpm)0,411 Hz
ABUTMENT
da max - Max shoulder diameter IR52 mm
db min - Min IR shoulder diameter50 mm
Da min - Min shoulder diameter OR77 mm
Da max - Max shoulder diameter OR81,5 mm
Db min - Min OR shoulder diameter82 mm
Ca - Min clearance3 mm
Cb - Min clearance5 mm
ra max - Max fillet radius2 mm
r1a - Max fillet radius1,5 mm
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