ROX is a patented solution designed for conveyor applications in polluted environments: the harsher the environment, the better it performs. ROX is ideal for applications in industries like mining and quarrying, cement, pulp and paper, recycling, and steel.
Designed for maintenance managers, ROX maximizes production by significantly reducing downtime: more than 2 times longer bearing life, and lubrication reduced by more than 50% compared to open solutions thanks to the dual metallic shields (ZZ).
The welded deflectors on the cage allow for bearing misalignment and radial clearance control during assembly. Speed, temperature, assembly, adjustment, and accessories are all identical to the equivalent standard open version. It is also 100% compatible with standard premium bearings (ISO).
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 | 75 mm |
| D - External diameter | 130 mm |
| B - Bearing/Inner ring width | 31 mm |
| d2 - External diameter inner ring | 88,4 mm |
| D1 - Inner diameter outer ring | 117,8 mm |
| rs - Min fillet radius | 1,5 mm |
| Number of lubrication holes | 3 |
| b - Groove width | 7,37 mm |
| k - Hole diameter | 3,5 mm |
| Associated sleeve reference | H315 |
| Radial clearance class | CN |
| Mass | 1,68 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 244 kN |
| C0 - Static load | 249 kN |
| Cu - Fatigue limit load | 29,9 kN |
| e - Coefficient | 0.22 |
| Y0 - Static axial load coefficient | 3.06 |
| Y1 - Lower axial load coefficient | 3.13 |
| Y2 - Upper axial load coefficient | 4.67 |
| N ref - Reference thermal speed | 4600 tr/min |
| N lim - Mechanical Limit Speed | 6200 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) | 8,127 Hz |
| BPFI - Over rolling frequency on inner (60 rpm) | 10,873 Hz |
| BSF - Over rolling frequency on rolling element (60 rpm) | 6,707 Hz |
| BRF - Rotational frequency – rolling element (60 rpm) | 3,354 Hz |
| FTF - Rotational frequency - cage (60 rpm) | 0,428 Hz |
| ABUTMENT | |
|---|---|
| da max - Max shoulder diameter IR | 88,4 mm |
| da min - Min shoulder diameter IR | 84 mm |
| db - Min diameter for Sleeve | 80 mm |
| Ce - Min length fro Sleeve | 12 mm |
| Da max - Max shoulder diameter OR | 121 mm |
| ra max - Max shaft & housing fillet radius | 1,5 mm |
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