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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 EUROPE offers as standard, unsurpassed endurance and longevity.


3D file

Technical datasheet

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d - Internal diameter90 mm
D - External diameter190 mm
B - Bearing/Inner ring width43 mm
D1 - Inner diameter outer ring161,5 mm
rs - Min fillet radius3 mm
Number of lubrication holes0
b - Groove width0 mm
k - Hole diameter0 mm
Associated sleeve referenceH318
Radial clearance classC3
Mass6,03 kg
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C - Dynamic load370 kN
C0 - Static load377 kN
Cu - Fatigue limit load41,3 kN
e - Coefficient0.22
Y0 - Static axial load coefficient2.93
Y1 - Lower axial load coefficient3
Y2 - Upper axial load coefficient4.47
Nref - Reference thermal speed3400 tr/min
Nlim - Mechanical Limit Speed4300 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature200 °C
BPFO - Characteristic outer ring frequency (60 rpm)6,72 Hz
BPFI - Characteristic inner ring frequency (60 rpm)9,28 Hz
FTF - Characteristic cage frequency (60 rpm)0,42 Hz
BSF - Characteristic rolling element frequency (60 rpm)6,024 Hz
da max - Max shoulder diameter IR0 mm
da min - Min shoulder diameter IR104 mm
db - Min diameter for Sleeve96 mm
Ce - Min length fro Sleeve7 mm
Da max - Max shoulder diameter OR176 mm
ra max - Max shaft & housing fillet radius2,5 mm
Product classification image
Calcul factors image