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 | 140 mm |
| D - External diameter | 250 mm |
| B - Bearing/Inner ring width | 68 mm |
| D1 - Inner diameter outer ring | 223,9 mm |
| rs - Min fillet radius | 3 mm |
| Number of lubrication holes | 3 ou 4 |
| b - Groove width | 14,2 mm |
| k - Hole diameter | 7 mm |
| Radial clearance class | C3 |
| Mass | 14,4 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 867 kN |
| C0 - Static load | 1010 kN |
| Cu - Fatigue limit load | 100 kN |
| e - Coefficient | 0.25 |
| Y0 - Static axial load coefficient | 2.68 |
| Y1 - Lower axial load coefficient | 2.74 |
| Y2 - Upper axial load coefficient | 4.08 |
| N ref - Reference thermal speed | 2500 tr/min |
| N lim - Mechanical Limit Speed | 3300 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) | 7,589 Hz |
| BPFI - Over rolling frequency on inner (60 rpm) | 10,412 Hz |
| BSF - Over rolling frequency on rolling element (60 rpm) | 6,137 Hz |
| BRF - Rotational frequency – rolling element (60 rpm) | 3,069 Hz |
| FTF - Rotational frequency - cage (60 rpm) | 0,422 Hz |
| ABUTMENT | |
|---|---|
| da max - Max shoulder diameter IR | 0 mm |
| da min - Min shoulder diameter IR | 154 mm |
| Da max - Max shoulder diameter OR | 236 mm |
| ra max - Max shaft & housing fillet radius | 2,5 mm |
