
Spherical roller bearing, pressed steel cage, groove and lubrication holes on outer ring, 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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PRODUCT DEFINITION | |
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Brand | SNR |
d - Internal diameter | 150 mm |
D - External diameter | 270 mm |
B - Bearing/Inner ring width | 73 mm |
d2 - External diameter inner ring | 177,3 mm |
D1 - Inner diameter outer ring | 241,1 mm |
rs - Min fillet radius | 3 mm |
Number of lubrication holes | 3 ou 4 |
b - Groove width | 15 mm |
k - Hole diameter | 7 mm |
Associated sleeve reference | H3130 |
Radial clearance class | C4 |
Mass | 17,6 kg |
PRODUCT PERFORMANCE | |
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C - Dynamic load | 1080 kN |
C0 - Static load | 1220 kN |
Cu - Fatigue limit load | 118 kN |
e - Coefficient | 0.25 |
Y0 - Static axial load coefficient | 2.68 |
Y1 - Lower axial load coefficient | 2.74 |
Y2 - Upper axial load coefficient | 4.08 |
N ref - Reference thermal speed | 2200 tr/min |
N lim - Mechanical Limit Speed | 3000 tr/min |
Tmin - Min operating temperature | -40 °C |
Tmax - Max operating temperature | 200 °C |
BEARING FREQUENCIES | |
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BPFO - Characteristic outer ring frequency (60 rpm) | 7,598 Hz |
BPFI - Characteristic inner ring frequency (60 rpm) | 10,402 Hz |
FTF - Characteristic cage frequency (60 rpm) | 0,422 Hz |
BSF - Characteristic rolling element frequency (60 rpm) | 6,181 Hz |
ABUTMENT | |
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da min - Min shoulder diameter IR | 164 mm |
db - Min diameter for Sleeve | 160 mm |
Ce - Min length fro Sleeve | 15 mm |
Da max - Max shoulder diameter OR | 256 mm |
ra max - Max shaft & housing fillet radius | 2,5 mm |
