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Single row tapered roller bearings

30311A - SNR

30311A

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 diameter55 mm
D - External diameter120 mm
B - Bearing/Inner ring width29 mm
C - Outer ring width25 mm
T - Total width31,5 mm
d1 - External diameter inner ring85,3 mm
a - Charge load application point24,9 mm
rs - Min fillet radius2,5 mm
r1s - Min fillet radius2 mm
Mass1,63 kg
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PRODUCT PERFORMANCE
C - Dynamic load168 kN
A2 - Rating life coefficient1
C0 - Static load188 kN
Cu - Fatigue limit load22,9 kN
e - Coefficient0.35
Y0 - Static axial load coefficient0.96
Y2 - Upper axial load coefficient1.74
N ref - Reference thermal speed4300 tr/min
N lim - Mechanical Limit Speed6100 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)6,567 Hz
BPFI - Over rolling frequency on inner (60 rpm)9,433 Hz
BSF - Over rolling frequency on rolling element (60 rpm)5,266 Hz
BRF - Rotational frequency – rolling element (60 rpm)2,633 Hz
FTF - Rotational frequency - cage (60 rpm)0,41 Hz
ABUTMENT
da max - Max shoulder diameter IR71 mm
db min - Min IR shoulder diameter65 mm
Da min - Min shoulder diameter OR104 mm
Da max - Max shoulder diameter OR110 mm
Db min - Min OR shoulder diameter111 mm
Ca - Min clearance4 mm
Cb - Min clearance6,5 mm
ra max - Max fillet radius2,5 mm
r1a - Max fillet radius2 mm
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