Spherical roller bearing for vibratory applications, one-piece machined cage, groove and lubrication holes on outer ring, special C4 class clearance
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 | 180 mm |
| D - External diameter | 320 mm |
| B - Bearing/Inner ring width | 112 mm |
| d2 - External diameter inner ring | 0 mm |
| D1 - Inner diameter outer ring | 281,2 mm |
| rs - Min fillet radius | 4 mm |
| Number of lubrication holes | 3 ou 8 |
| b - Groove width | 16,4 mm |
| k - Hole diameter | 8 mm |
| Radial clearance class | C4 Special |
| Mass | 37,8 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 1800 kN |
| C0 - Static load | 2270 kN |
| Cu - Fatigue limit load | 209 kN |
| e - Coefficient | 0.33 |
| Y0 - Static axial load coefficient | 2.01 |
| Y1 - Lower axial load coefficient | 2.06 |
| Y2 - Upper axial load coefficient | 3.06 |
| N ref - Reference thermal speed | 1200 tr/min |
| N lim - Mechanical Limit Speed | 1900 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) | 8,089 Hz |
| BPFI - Over rolling frequency on inner (60 rpm) | 10,911 Hz |
| BSF - Over rolling frequency on rolling element (60 rpm) | 6,431 Hz |
| BRF - Rotational frequency – rolling element (60 rpm) | 3,216 Hz |
| FTF - Rotational frequency - cage (60 rpm) | 0,426 Hz |
| ABUTMENT | |
|---|---|
| da max - Max shoulder diameter IR | 0 mm |
| da min - Min shoulder diameter IR | 197 mm |
| Da max - Max shoulder diameter OR | 303 mm |
| ra max - Max shaft & housing fillet radius | 3 mm |
