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30211.A - SNR


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.


3D file

Technical datasheet

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d - Internal diameter55 mm
D - External diameter100 mm
B - Bearing/Inner ring width21 mm
C - Outer ring width18 mm
T - Total width22,75 mm
d1 - External diameter inner ring75,2 mm
a - Charge load application point21,1 mm
rs - Min fillet radius2 mm
r1s - Min fillet radius1,5 mm
Mass0,712 kg
ISO 355 referenceT3DB055
Product classification image
C - Dynamic load95,1 kN
A2 - Rating life coefficient1
C0 - Static load114 kN
Cu - Fatigue limit load13,9 kN
e - Coefficient0.4
Y0 - Static axial load coefficient0.81
Y2 - Upper axial load coefficient1.48
Nref - Reference thermal speed4500 tr/min
Nlim - Mechanical Limit Speed7300 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
BPFO - Characteristic outer ring frequency (60 rpm)8,09 Hz
BPFI - Characteristic inner ring frequency (60 rpm)10,91 Hz
FTF - Characteristic cage frequency (60 rpm)0,426 Hz
BSF - Characteristic rolling element frequency (60 rpm)6,361 Hz
da max - Max shoulder diameter IR64 mm
db min - Min IR shoulder diameter65 mm
Da min - Min shoulder diameter OR88 mm
Da max - Max shoulder diameter OR91,5 mm
Db min - Min OR shoulder diameter94 mm
Ca - Min clearance4 mm
Cb - Min clearance4,5 mm
ra max - Max fillet radius2 mm
r1a - Max fillet radius1,5 mm
Product classification image
Calcul factors image

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