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21318VMKC3 - SNR


Spherical roller bearing, one-piece machined cage, tapered bore 1:12

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-SNR offers as standard, unsurpassed endurance and longevity.


CAD file

Technical datasheet

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Internal diameter d 90 mm
External diameter D 190 mm
Bearing/Inner ring width(B) 43 mm
Inner diameter outer ring D1 161,5 mm
Min fillet radius rs 3 mm
Number of lubrication holes 0
Groove width (b) 0 mm
Hole diameter (k) 0 mm
Associated sleeve reference H318
Coef e 0.22
Lower axial load coef (Y1) 3.0
Upper axial load coef (Y2) 4.47
Static axial load coef (Y0) 2.93
Radial clearance class C3
Mass 6,03 kg
Brand SNR
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Dynamic load, C 370 kN
Static load, C0 377 kN
Fatigue limit load, Cu 41,3 kN
Reference thermal speed (Nref) 3400 tr/min
Mechanical Limit Speed Nlim 4300 tr/min
Min operating temperature, Tmin -40 °C
Max operating temperature, Tmax 200 °C
Characteristic cage frequency, FTF 0,42 Hz
Characteristic rolling element frequency, BSF 6,024 Hz
Characteristic outer ring frequency, BPF0 6,72 Hz
Characteristic inner ring frequency, BPFI 9,28 Hz


Max shoulder diameter IR da max 0 mm
Min shoulder diameter IR da min 104 mm
Min diameter for Sleeve db 96 mm
Min length fro Sleeve Ce 7 mm
Max shoulder diameter OR Da max 176 mm
Max shaft & housing fillet radius ra max 2,5 mm
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