Spherical roller bearing, one-piece machined cage, groove and lubrication holes on outer ring, tapered bore 1:12
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 | 25 mm |
| D - External diameter | 52 mm |
| B - Bearing/Inner ring width | 18 mm |
| D1 - Inner diameter outer ring | 45,5 mm |
| rs - Min fillet radius | 1 mm |
| Number of lubrication holes | 3 |
| b - Groove width | 3 mm |
| k - Hole diameter | 1,5 mm |
| Associated sleeve reference | H305 |
| Radial clearance class | C4 |
| Mass | 0,155 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 54,2 kN |
| C0 - Static load | 42,8 kN |
| Cu - Fatigue limit load | 5,2 kN |
| e - Coefficient | 0.34 |
| Y0 - Static axial load coefficient | 1.96 |
| Y1 - Lower axial load coefficient | 2 |
| Y2 - Upper axial load coefficient | 2.98 |
| N ref - Reference thermal speed | 14000 tr/min |
| N lim - Mechanical Limit Speed | 17000 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) | 5,241 Hz |
| BPFI - Over rolling frequency on inner (60 rpm) | 7,759 Hz |
| BSF - Over rolling frequency on rolling element (60 rpm) | 4,85 Hz |
| BRF - Rotational frequency – rolling element (60 rpm) | 2,425 Hz |
| FTF - Rotational frequency - cage (60 rpm) | 0,403 Hz |
| ABUTMENT | |
|---|---|
| da max - Max shoulder diameter IR | 0 mm |
| da min - Min shoulder diameter IR | 30,6 mm |
| db - Min diameter for Sleeve | 28 mm |
| Ce - Min length fro Sleeve | 5 mm |
| Da max - Max shoulder diameter OR | 46,4 mm |
| ra max - Max shaft & housing fillet radius | 1 mm |
