High precision angular contact ball bearing, moulded polyamide cage centred on balls
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 | NTN |
| d - Internal diameter | 50 mm |
| D - External diameter | 72 mm |
| B - Bearing/Inner ring width | 12 mm |
| d1 - External diameter inner ring | 57,2 mm |
| d2 - External diameter inner ring | 55,3 mm |
| D1 - Inner diameter outer ring | 64,9 mm |
| D2 - Inner diameter outer ring | 68,5 mm |
| a - Charge load application point | 20,3 mm |
| α - Contact angle | 25 ° |
| rs - Min fillet radius | 0,6 mm |
| r1s - Min fillet radius | 0,3 mm |
| Precision class | P42 |
| Mass | 0,13 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 19,8 kN |
| C0 - Static load | 15,8 kN |
| f0 - Coefficient | 16.3 |
| N lim - Oil lubrication limit speed | 26900 tr/min |
| N lim - Grease lubrication limit speed | 16600 tr/min |
| Preload level | GN |
| Preload value | 0,177 kN |
| Axial rigidity | 138,4 N/µm |
| Radial rigidity | 293,8 N/µm |
| Tmin - Min operating temperature | -20 °C |
| Tmax - Max operating temperature | 120 °C |
| ABUTMENT | |
|---|---|
| da min - Min shoulder diameter IR | 54,5 mm |
| Da max - Max shoulder diameter OR | 67,5 mm |
| Db max - Max OR shoulder diameter | 69,5 mm |
| r1a - Max fillet radius | 0,3 mm |
| ra max - Max shaft & housing fillet radius | 0,6 mm |
