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.
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Product information
| PRODUCT DEFINITION | |
|---|---|
| Brand | SNR |
| d - Internal diameter | 280 mm |
| D - External diameter | 420 mm |
| B - Bearing/Inner ring width | 140 mm |
| D1 - Inner diameter outer ring | 377,4 mm |
| rs - Min fillet radius | 4 mm |
| Number of lubrication holes | 8 |
| b - Groove width | 16,42 mm |
| k - Hole diameter | 8 mm |
| Radial clearance class | C3 |
| Mass | 66 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 2720 kN |
| C0 - Static load | 4120 kN |
| Cu - Fatigue limit load | 344 kN |
| e - Coefficient | 0.3 |
| Y0 - Static axial load coefficient | 2.2 |
| Y1 - Lower axial load coefficient | 2.25 |
| Y2 - Upper axial load coefficient | 3.34 |
| N ref - Reference thermal speed | 900 tr/min |
| N lim - Mechanical Limit Speed | 1500 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) | 10,637 Hz |
| BPFI - Over rolling frequency on inner (60 rpm) | 13,363 Hz |
| BSF - Over rolling frequency on rolling element (60 rpm) | 8,521 Hz |
| BRF - Rotational frequency – rolling element (60 rpm) | 4,261 Hz |
| FTF - Rotational frequency - cage (60 rpm) | 0,443 Hz |
| ABUTMENT | |
|---|---|
| da max - Max shoulder diameter IR | 0 mm |
| da min - Min shoulder diameter IR | 294,6 mm |
| Da max - Max shoulder diameter OR | 405,4 mm |
| ra max - Max shaft & housing fillet radius | 3 mm |
