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Single row tapered roller bearings

30312A - SNR

30312A

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 diameter60 mm
D - External diameter130 mm
B - Bearing/Inner ring width31 mm
C - Outer ring width26 mm
T - Total width33,5 mm
d1 - External diameter inner ring92,4 mm
a - Charge load application point26,6 mm
rs - Min fillet radius3 mm
r1s - Min fillet radius2,5 mm
Mass1,99 kg
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PRODUCT PERFORMANCE
C - Dynamic load188 kN
A2 - Rating life coefficient1
C0 - Static load210 kN
Cu - Fatigue limit load25,6 kN
e - Coefficient0.35
Y0 - Static axial load coefficient0.96
Y2 - Upper axial load coefficient1.74
N ref - Reference thermal speed4100 tr/min
N lim - Mechanical Limit Speed5700 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 IR77 mm
db min - Min IR shoulder diameter72 mm
Da min - Min shoulder diameter OR112 mm
Da max - Max shoulder diameter OR118 mm
Db min - Min OR shoulder diameter120 mm
Ca - Min clearance5 mm
Cb - Min clearance7,5 mm
ra max - Max fillet radius3 mm
r1a - Max fillet radius2,5 mm
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