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Spherical roller bearings

23028EMW33C4 - SNR

23028EMW33C4

Spherical roller bearing, one-piece machined cage, groove and lubrication holes on outer ring

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.

Documentation

Product information

PRODUCT DEFINITION
BrandSNR
d - Internal diameter140 mm
D - External diameter210 mm
B - Bearing/Inner ring width53 mm
d2 - External diameter inner ring0 mm
D1 - Inner diameter outer ring192,7 mm
rs - Min fillet radius2 mm
Number of lubrication holes3
b - Groove width8,91 mm
k - Hole diameter4 mm
Radial clearance classC4
Mass6,44 kg
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PRODUCT PERFORMANCE
C - Dynamic load597 kN
C0 - Static load783 kN
Cu - Fatigue limit load80,4 kN
e - Coefficient0.22
Y0 - Static axial load coefficient3.07
Y1 - Lower axial load coefficient3.14
Y2 - Upper axial load coefficient4.67
N ref - Reference thermal speed2800 tr/min
N lim - Mechanical Limit Speed3400 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature200 °C
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)11,125 Hz
BPFI - Over rolling frequency on inner (60 rpm)13,875 Hz
BSF - Over rolling frequency on rolling element (60 rpm)8,89 Hz
BRF - Rotational frequency – rolling element (60 rpm)4,445 Hz
FTF - Rotational frequency - cage (60 rpm)0,445 Hz
ABUTMENT
da max - Max shoulder diameter IR0 mm
da min - Min shoulder diameter IR148,8 mm
Da max - Max shoulder diameter OR201,2 mm
ra max - Max shaft & housing fillet radius2 mm
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