Spherical roller bearing, with central rib on inner ring, pressed steel 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.
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Product information
| PRODUCT DEFINITION | |
|---|---|
| Brand | SNR |
| d - Internal diameter | 160 mm |
| D - External diameter | 270 mm |
| B - Bearing/Inner ring width | 109 mm |
| d2 - External diameter inner ring | 179,574 mm |
| D1 - Inner diameter outer ring | 233,4 mm |
| rs - Min fillet radius | 2,1 mm |
| Number of lubrication holes | 3 ou 4 |
| b - Groove width | 14,14 mm |
| k - Hole diameter | 6 mm |
| Radial clearance class | C3 |
| Mass | 24,57 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 1320 kN |
| C0 - Static load | 1770 kN |
| Cu - Fatigue limit load | 171 kN |
| e - Coefficient | 0.37 |
| Y0 - Static axial load coefficient | 1.79 |
| Y1 - Lower axial load coefficient | 1.83 |
| Y2 - Upper axial load coefficient | 2.72 |
| N ref - Reference thermal speed | 1400 tr/min |
| N lim - Mechanical Limit Speed | 1900 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) | 8,715 Hz |
| BPFI - Over rolling frequency on inner (60 rpm) | 11,285 Hz |
| BSF - Over rolling frequency on rolling element (60 rpm) | 7,431 Hz |
| BRF - Rotational frequency – rolling element (60 rpm) | 3,716 Hz |
| FTF - Rotational frequency - cage (60 rpm) | 0,436 Hz |
| ABUTMENT | |
|---|---|
| da max - Max shoulder diameter IR | 0 mm |
| da min - Min shoulder diameter IR | 172 mm |
| Da max - Max shoulder diameter OR | 258 mm |
| ra max - Max shaft & housing fillet radius | 2 mm |
