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30306A - SNR

30306A

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.

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Technical datasheet

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PRODUCT DEFINITION
BrandSNR
d - Internal diameter30 mm
D - External diameter72 mm
B - Bearing/Inner ring width19 mm
C - Outer ring width16 mm
T - Total width20,75 mm
d1 - External diameter inner ring49,2 mm
a - Charge load application point15,4 mm
rs - Min fillet radius1,5 mm
r1s - Min fillet radius1,5 mm
Mass0,387 kg
ISO 355 referenceT2FB030
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PRODUCT PERFORMANCE
C - Dynamic load62,1 kN
A2 - Rating life coefficient1
C0 - Static load63,6 kN
Cu - Fatigue limit load7,8 kN
e - Coefficient0.32
Y0 - Static axial load coefficient1.05
Y2 - Upper axial load coefficient1.9
Nref - Reference thermal speed7100 tr/min
Nlim - Mechanical Limit Speed11000 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
BEARING FREQUENCIES
BPFO - Characteristic outer ring frequency (60 rpm)5,604 Hz
BPFI - Characteristic inner ring frequency (60 rpm)8,396 Hz
FTF - Characteristic cage frequency (60 rpm)0,4 Hz
BSF - Characteristic rolling element frequency (60 rpm)4,713 Hz
ABUTMENT
da max - Max shoulder diameter IR40 mm
db min - Min IR shoulder diameter38,5 mm
Da min - Min shoulder diameter OR62 mm
Da max - Max shoulder diameter OR63,5 mm
Db min - Min OR shoulder diameter66 mm
Ca - Min clearance3 mm
Cb - Min clearance4,5 mm
ra max - Max fillet radius1,5 mm
r1a - Max fillet radius1,5 mm
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