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21306V - SNR


Spherical roller bearing, pressed steel cage

The spherical roller bearing withstands significant loads and misalignments. This type of roller bearing is well adapted to harsh operating conditions: impacts or vibrations (crushers, vibrating screens, heavy handling, etc.). With the ULTAGE design, NTN EUROPE offers as standard, unsurpassed endurance and longevity.


3D file

Technical datasheet

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d - Internal diameter30 mm
D - External diameter72 mm
B - Bearing/Inner ring width19 mm
d2 - External diameter inner ring40,8 mm
D1 - Inner diameter outer ring59,7 mm
rs - Min fillet radius1,1 mm
Number of lubrication holes0
b - Groove width0 mm
k - Hole diameter0 mm
Radial clearance classCN
Mass0,394 kg
Product classification image
C - Dynamic load64,6 kN
C0 - Static load52,1 kN
Cu - Fatigue limit load6,1 kN
e - Coefficient0.28
Y0 - Static axial load coefficient2.39
Y1 - Lower axial load coefficient2.45
Y2 - Upper axial load coefficient3.64
Nref - Reference thermal speed7800 tr/min
Nlim - Mechanical Limit Speed12000 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature200 °C
BPFO - Characteristic outer ring frequency (60 rpm)4,856 Hz
BPFI - Characteristic inner ring frequency (60 rpm)7,144 Hz
FTF - Characteristic cage frequency (60 rpm)0,405 Hz
BSF - Characteristic rolling element frequency (60 rpm)4,973 Hz
da max - Max shoulder diameter IR0 mm
da min - Min shoulder diameter IR37 mm
Da max - Max shoulder diameter OR65 mm
ra max - Max shaft & housing fillet radius1 mm
Product classification image
Calcul factors image