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21308VKC3 - SNR

21308VKC3

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 diameter40 mm
D - External diameter90 mm
B - Bearing/Inner ring width23 mm
d2 - External diameter inner ring53,5 mm
D1 - Inner diameter outer ring75,4 mm
rs - Min fillet radius1,5 mm
Number of lubrication holes0
b - Groove width0 mm
k - Hole diameter0 mm
Associated sleeve referenceH308
Radial clearance classC3
Mass0,705 kg
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PRODUCT PERFORMANCE
C - Dynamic load97,7 kN
C0 - Static load86,7 kN
Cu - Fatigue limit load10,6 kN
e - Coefficient0.26
Y0 - Static axial load coefficient2.5
Y1 - Lower axial load coefficient2.55
Y2 - Upper axial load coefficient3.8
Nref - Reference thermal speed6400 tr/min
Nlim - Mechanical Limit Speed9300 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature200 °C
BEARING FREQUENCIES
BPFO - Characteristic outer ring frequency (60 rpm)5,797 Hz
BPFI - Characteristic inner ring frequency (60 rpm)8,203 Hz
FTF - Characteristic cage frequency (60 rpm)0,414 Hz
BSF - Characteristic rolling element frequency (60 rpm)5,561 Hz
ABUTMENT
da max - Max shoulder diameter IR0 mm
da min - Min shoulder diameter IR49 mm
db - Min diameter for Sleeve44 mm
Ce - Min length fro Sleeve5 mm
Da max - Max shoulder diameter OR81 mm
ra max - Max shaft & housing fillet radius1,5 mm
Product classification image
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