30211A - 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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Internal diameter (d) 55 mm
External diameter (D) 100 mm
Bearing/Inner ring width (B) 21 mm
Outer ring width (C ) 18 mm
Total width (T) 22,75 mm
External diameter inner ring d1 75,2 mm
Charge load application point a 21,1 mm
Min fillet radius (rs) 2 mm
Min fillet radius r1s 1,5 mm
Coef (e) 0.4
Upper axial load coef (Y2) 1.48
Static axial load coef (Y0) 0.81
Mass 0,712 kg
ISO 355 reference T3DB055
Brand SNR
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Dynamic load (C) 95,1 kN
Rating life coefficient, A2 1
Static load (C0) 114 kN
Fatigue limit load (Cu) 13,9 kN
Reference thermal speed (Nref) 4500 tr/min
Mechanical Limit Speed (Nlim) 7300 tr/min
Min operating temperature (Tmin) -40 °C
Max operating temperature (Tmax) 120 °C
Characteristic cage frequency, FTF 0,426 Hz
Characteristic rolling element frequency, BSF 6,361 Hz
Characteristic outer ring frequency, BPF0 8,09 Hz
Characteristic inner ring frequency, BPFI 10,91 Hz


Max shoulder diameter IR (da max) 64 mm
Min IR shoulder diameter (db min) 65 mm
Min shoulder diameter OR Da min 88 mm
Max shoulder diameter OR (Da max) 91,5 mm
Min OR shoulder diameter Db min 94 mm
Min clearance Ca 4 mm
Min clearance Cb 4,5 mm
Max fillet radius ra max 2 mm
Maxi fillet radius r1a 1,5 mm
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