In the ball bearing and high precision bearing ranges, the high precision angular contact ball bearing solves the maximum reliability constraints with increased performance in terms of rigidity, speed, capacity and precision. This bearing is recommended for demanding applications in terms of precision such as machine tool spindles. NTN is getting sub-ranges dedicated to requirements of speed, sealing, specific greasing, etc.
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Product information
| PRODUCT DEFINITION | |
|---|---|
| Brand | SNR |
| d - Internal diameter | 70 mm |
| D - External diameter | 110 mm |
| B - Bearing/Inner ring width | 20 mm |
| d1 - External diameter inner ring | 82,6 mm |
| D1 - Inner diameter outer ring | 97,4 mm |
| D2 - Inner diameter outer ring | 101,7 mm |
| a - Charge load application point | 31 mm |
| α - Contact angle | 25 ° |
| rs - Min fillet radius | 1,1 mm |
| r1s - Min fillet radius | 1 mm |
| Precision class | P4 |
| Mass | 0,61 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 45,5 kN |
| C0 - Static load | 42,9 kN |
| Cu - Fatigue limit load | 2,4 kN |
| f0 - Coefficient | 15.915 |
| Axial displacement K Factor | 0.49 |
| Preload level | 7 |
| Preload value | 0,4 kN |
| Axial rigidity | 211 N/µm |
| Radial rigidity | 453 N/µm |
| Tmin - Min operating temperature | -30 °C |
| Tmax - Max operating temperature | 120 °C |
| N lim - Oil lubrication limit speed | 18000 tr/min |
| N lim - Grease lubrication limit speed | 11500 tr/min |
| BEARING FREQUENCIES | |
|---|---|
| BPFO - Over rolling frequency on outer ring (60 rpm) | 9,241 Hz |
| BPFI - Over rolling frequency on inner (60 rpm) | 11,759 Hz |
| BSF - Over rolling frequency on rolling element (60 rpm) | 7,451 Hz |
| BRF - Rotational frequency – rolling element (60 rpm) | 3,726 Hz |
| FTF - Rotational frequency - cage (60 rpm) | 0,44 Hz |
| ABUTMENT | |
|---|---|
| da min - Min shoulder diameter IR | 77 mm |
| db min - Min IR shoulder diameter | 77 mm |
| Da max - Max shoulder diameter OR | 103 mm |
| Db max - Max OR shoulder diameter | 103 mm |
| r1a - Max fillet radius | 1 mm |
| ra max - Max shaft & housing fillet radius | 1 mm |
