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21311VKC3 - SNR

21311VKC3

Spherical roller bearing, pressed steel 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.

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Technical datasheet

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PRODUCT DEFINITION
BrandSNR
d - Internal diameter55 mm
D - External diameter120 mm
B - Bearing/Inner ring width29 mm
d2 - External diameter inner ring73,6 mm
D1 - Inner diameter outer ring102 mm
rs - Min fillet radius2 mm
Number of lubrication holes0
b - Groove width0 mm
k - Hole diameter0 mm
Associated sleeve referenceH311
Radial clearance classC3
Mass1,52 kg
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PRODUCT PERFORMANCE
C - Dynamic load172 kN
C0 - Static load164 kN
Cu - Fatigue limit load20 kN
e - Coefficient0.24
Y0 - Static axial load coefficient2.76
Y1 - Lower axial load coefficient2.83
Y2 - Upper axial load coefficient4.21
Nref - Reference thermal speed5000 tr/min
Nlim - Mechanical Limit Speed6900 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature200 °C
BEARING FREQUENCIES
BPFO - Characteristic outer ring frequency (60 rpm)6,26 Hz
BPFI - Characteristic inner ring frequency (60 rpm)8,74 Hz
FTF - Characteristic cage frequency (60 rpm)0,417 Hz
BSF - Characteristic rolling element frequency (60 rpm)5,81 Hz
ABUTMENT
da max - Max shoulder diameter IR0 mm
da min - Min shoulder diameter IR66 mm
db - Min diameter for Sleeve60 mm
Ce - Min length fro Sleeve6 mm
Da max - Max shoulder diameter OR109 mm
ra max - Max shaft & housing fillet radius2 mm
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