Spherical roller bearing, with central rib on inner ring, 2-part machined cage centred on inner ring, 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 | NTN |
| d - Internal diameter | 400 mm |
| D - External diameter | 720 mm |
| B - Bearing/Inner ring width | 256 mm |
| d2 - External diameter inner ring | 0 mm |
| D1 - Inner diameter outer ring | 611,1 mm |
| rs - Min fillet radius | 6 mm |
| Number of lubrication holes | 8 |
| b - Groove width | 33 mm |
| k - Hole diameter | 20 mm |
| Associated sleeve reference | H3280 |
| Radial clearance class | C3 |
| Mass | 443 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 6500 kN |
| C0 - Static load | 10600 kN |
| Cu - Fatigue limit load | 740 kN |
| e - Coefficient | 0.37 |
| Y0 - Static axial load coefficient | 1.77 |
| Y1 - Lower axial load coefficient | 1.81 |
| Y2 - Upper axial load coefficient | 2.69 |
| N lim - Oil lubrication limit speed | 520 tr/min |
| N lim - Grease lubrication limit speed | 400 tr/min |
| Tmin - Min operating temperature | -40 °C |
| Tmax - Max operating temperature | 120 °C |
| ABUTMENT | |
|---|---|
| da min - Min shoulder diameter IR | 426 mm |
| db - Min diameter for Sleeve | 427 mm |
| Ce - Min length fro Sleeve | 15 mm |
| Da max - Max shoulder diameter OR | 694 mm |
| ra max - Max shaft & housing fillet radius | 5 mm |
