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 | 150 mm |
| D - External diameter | 250 mm |
| B - Bearing/Inner ring width | 100 mm |
| d2 - External diameter inner ring | 165,8 mm |
| D1 - Inner diameter outer ring | 218,1 mm |
| rs - Min fillet radius | 2,1 mm |
| Number of lubrication holes | 3 ou 4 |
| b - Groove width | 10,4 mm |
| k - Hole diameter | 5 mm |
| Radial clearance class | CN |
| Mass | 19,9 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 1120 kN |
| C0 - Static load | 1400 kN |
| Cu - Fatigue limit load | 138 kN |
| e - Coefficient | 0.38 |
| Y0 - Static axial load coefficient | 1.74 |
| Y1 - Lower axial load coefficient | 1.78 |
| Y2 - Upper axial load coefficient | 2.66 |
| N ref - Reference thermal speed | 1600 tr/min |
| N lim - Mechanical Limit Speed | 2000 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) | 8,17 Hz |
| BPFI - Over rolling frequency on inner (60 rpm) | 10,83 Hz |
| BSF - Over rolling frequency on rolling element (60 rpm) | 6,789 Hz |
| BRF - Rotational frequency – rolling element (60 rpm) | 3,395 Hz |
| FTF - Rotational frequency - cage (60 rpm) | 0,43 Hz |
| ABUTMENT | |
|---|---|
| da max - Max shoulder diameter IR | 0 mm |
| da min - Min shoulder diameter IR | 162 mm |
| Da max - Max shoulder diameter OR | 238 mm |
| ra max - Max shaft & housing fillet radius | 2 mm |
