Name: 21305VK
SKU: 21305VK-SNR

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 offers as standard, unsurpassed endurance and longevity.

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3D file

Product information

PRODUCT DEFINITION
Brand	SNR
d - Internal diameter	25 mm
D - External diameter	62 mm
B - Bearing/Inner ring width	17 mm
d2 - External diameter inner ring	34,5 mm
D1 - Inner diameter outer ring	51,2 mm
rs - Min fillet radius	1,1 mm
Number of lubrication holes	0
b - Groove width	0 mm
k - Hole diameter	0 mm
Associated sleeve reference	H305
Radial clearance class	CN
Mass	0,254 kg

PRODUCT PERFORMANCE
C - Dynamic load	51,1 kN
C0 - Static load	40,3 kN
Cu - Fatigue limit load	4,9 kN
e - Coefficient	0.29
Y0 - Static axial load coefficient	2.28
Y1 - Lower axial load coefficient	2.33
Y2 - Upper axial load coefficient	3.47
N ref - Reference thermal speed	8800 tr/min
N lim - Mechanical Limit Speed	14000 tr/min
Tmin - Min operating temperature	-40 °C
Tmax - Max operating temperature	200 °C

BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)	4,824 Hz
BPFI - Over rolling frequency on inner (60 rpm)	7,176 Hz
BSF - Over rolling frequency on rolling element (60 rpm)	4,819 Hz
BRF - Rotational frequency – rolling element (60 rpm)	2,41 Hz
FTF - Rotational frequency - cage (60 rpm)	0,402 Hz

ABUTMENT
da max - Max shoulder diameter IR	0 mm
da min - Min shoulder diameter IR	32 mm
db - Min diameter for Sleeve	28 mm
Ce - Min length fro Sleeve	6 mm
Da max - Max shoulder diameter OR	55 mm
ra max - Max shaft & housing fillet radius	1 mm

Spherical roller bearings

21305VK - SNR

Documentation

Product information

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Spherical roller bearings

21305VK - SNR

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Documentation

Product information

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