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Single row tapered roller bearings

33012.A - SNR

33012.A

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 diameter95 mm
B - Bearing/Inner ring width27 mm
C - Outer ring width21 mm
T - Total width27 mm
d1 - External diameter inner ring77,8 mm
a - Charge load application point19,8 mm
rs - Min fillet radius1,5 mm
r1s - Min fillet radius1,5 mm
Mass0,691 kg
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PRODUCT PERFORMANCE
C - Dynamic load101 kN
A2 - Rating life coefficient1
C0 - Static load151 kN
Cu - Fatigue limit load18,4 kN
e - Coefficient0.33
Y0 - Static axial load coefficient1.01
Y2 - Upper axial load coefficient1.83
N ref - Reference thermal speed4600 tr/min
N lim - Mechanical Limit Speed7300 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)11,665 Hz
BPFI - Over rolling frequency on inner (60 rpm)14,335 Hz
BSF - Over rolling frequency on rolling element (60 rpm)9,409 Hz
BRF - Rotational frequency – rolling element (60 rpm)4,705 Hz
FTF - Rotational frequency - cage (60 rpm)0,449 Hz
ABUTMENT
da max - Max shoulder diameter IR67 mm
db min - Min IR shoulder diameter67 mm
Da min - Min shoulder diameter OR85 mm
Da max - Max shoulder diameter OR88 mm
Db min - Min OR shoulder diameter90 mm
Ca - Min clearance5 mm
Cb - Min clearance6 mm
ra max - Max fillet radius1,5 mm
r1a - Max fillet radius1,5 mm
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