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 | 170 mm |
| D - External diameter | 280 mm |
| B - Bearing/Inner ring width | 109 mm |
| d2 - External diameter inner ring | 191,501 mm |
| D1 - Inner diameter outer ring | 243,9 mm |
| rs - Min fillet radius | 2,1 mm |
| Number of lubrication holes | 3 ou 4 |
| b - Groove width | 14,139 mm |
| k - Hole diameter | 6 mm |
| Radial clearance class | C3 |
| Mass | 25,88 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 1370 kN |
| C0 - Static load | 1900 kN |
| Cu - Fatigue limit load | 181 kN |
| e - Coefficient | 0.35 |
| Y0 - Static axial load coefficient | 1.87 |
| Y1 - Lower axial load coefficient | 1.91 |
| Y2 - Upper axial load coefficient | 2.85 |
| N ref - Reference thermal speed | 1300 tr/min |
| N lim - Mechanical Limit Speed | 1800 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) | 9,223 Hz |
| BPFI - Over rolling frequency on inner (60 rpm) | 11,777 Hz |
| BSF - Over rolling frequency on rolling element (60 rpm) | 7,887 Hz |
| BRF - Rotational frequency – rolling element (60 rpm) | 3,944 Hz |
| FTF - Rotational frequency - cage (60 rpm) | 0,439 Hz |
| ABUTMENT | |
|---|---|
| da max - Max shoulder diameter IR | 0 mm |
| da min - Min shoulder diameter IR | 182 mm |
| Da max - Max shoulder diameter OR | 268 mm |
| ra max - Max shaft & housing fillet radius | 2 mm |
