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 | 220 mm |
| D - External diameter | 370 mm |
| B - Bearing/Inner ring width | 120 mm |
| D1 - Inner diameter outer ring | 327,9 mm |
| rs - Min fillet radius | 4 mm |
| Number of lubrication holes | 3 ou 8 |
| b - Groove width | 19,09 mm |
| k - Hole diameter | 9 mm |
| Radial clearance class | C4 |
| Mass | 52,21 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 2190 kN |
| C0 - Static load | 2940 kN |
| Cu - Fatigue limit load | 258 kN |
| e - Coefficient | 0.3 |
| Y0 - Static axial load coefficient | 2.23 |
| Y1 - Lower axial load coefficient | 2.28 |
| Y2 - Upper axial load coefficient | 3.4 |
| 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) | 9,088 Hz |
| BPFI - Over rolling frequency on inner (60 rpm) | 11,912 Hz |
| BSF - Over rolling frequency on rolling element (60 rpm) | 7,163 Hz |
| BRF - Rotational frequency – rolling element (60 rpm) | 3,582 Hz |
| FTF - Rotational frequency - cage (60 rpm) | 0,433 Hz |
| ABUTMENT | |
|---|---|
| da max - Max shoulder diameter IR | 0 mm |
| da min - Min shoulder diameter IR | 237 mm |
| Da max - Max shoulder diameter OR | 353 mm |
| ra max - Max shaft & housing fillet radius | 3 mm |
