Spherical roller bearing, 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 | 240 mm |
| D - External diameter | 400 mm |
| B - Bearing/Inner ring width | 160 mm |
| d2 - External diameter inner ring | 269 mm |
| D1 - Inner diameter outer ring | 348,1 mm |
| rs - Min fillet radius | 4 mm |
| Number of lubrication holes | 3 ou 8 |
| b - Groove width | 19,37 mm |
| k - Hole diameter | 12 mm |
| Radial clearance class | C4 |
| Mass | 76,7 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 2860 kN |
| C0 - Static load | 3990 kN |
| Cu - Fatigue limit load | 342 kN |
| e - Coefficient | 0.35 |
| Y0 - Static axial load coefficient | 1.88 |
| Y1 - Lower axial load coefficient | 1.92 |
| Y2 - Upper axial load coefficient | 2.86 |
| N ref - Reference thermal speed | 800 tr/min |
| N lim - Mechanical Limit Speed | 1300 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) | 8,642 Hz |
| BPFI - Over rolling frequency on inner (60 rpm) | 11,358 Hz |
| BSF - Over rolling frequency on rolling element (60 rpm) | 7,036 Hz |
| BRF - Rotational frequency – rolling element (60 rpm) | 3,518 Hz |
| FTF - Rotational frequency - cage (60 rpm) | 0,432 Hz |
| ABUTMENT | |
|---|---|
| da max - Max shoulder diameter IR | 0 mm |
| da min - Min shoulder diameter IR | 257 mm |
| Da max - Max shoulder diameter OR | 383 mm |
| ra max - Max shaft & housing fillet radius | 3 mm |
