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 | 106 mm |
| D1 - Inner diameter outer ring | 385,2 mm |
| rs - Min fillet radius | 4 mm |
| Number of lubrication holes | 8 |
| b - Groove width | 18,32 mm |
| k - Hole diameter | 8 mm |
| Radial clearance class | C4 |
| Mass | 51,2 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 2170 kN |
| C0 - Static load | 3150 kN |
| Cu - Fatigue limit load | 263 kN |
| e - Coefficient | 0.22 |
| Y0 - Static axial load coefficient | 3 |
| Y1 - Lower axial load coefficient | 3.07 |
| Y2 - Upper axial load coefficient | 4.58 |
| N ref - Reference thermal speed | 1200 tr/min |
| N lim - Mechanical Limit Speed | 1700 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) | 11,121 Hz |
| BPFI - Over rolling frequency on inner (60 rpm) | 13,879 Hz |
| BSF - Over rolling frequency on rolling element (60 rpm) | 8,861 Hz |
| BRF - Rotational frequency – rolling element (60 rpm) | 4,431 Hz |
| FTF - Rotational frequency - cage (60 rpm) | 0,445 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 |
