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-SNR is getting under ranges dedicated to requirements of speed, sealing, specific greasing, etc.
3D file
Technical datasheet
Specs
PRODUCT DEFINITION | |
|---|---|
| d - Internal diameter | 20 mm |
| D - External diameter | 42 mm |
| B - Bearing/Inner ring width | 12 mm |
| d1 - External diameter inner ring | 28,1 mm |
| d2 - External diameter inner ring | 26,4 mm |
| D1 - Inner diameter outer ring | 34,9 mm |
| D2 - Inner diameter outer ring | 38,4 mm |
| a - Charge load application point | 13,4 mm |
| α - Contact angle | 25 ° |
| rs - Min fillet radius | 0,6 mm |
| r1s - Min fillet radius | 0,3 mm |
| Precision class | P42 |
| Mass | 0,067 kg |
| Brand | NTN |
PRODUCT PERFORMANCE | |
|---|---|
| C0 - Static load | 6,3 kN |
| f0 - Coefficient | 14.4 |
| Nlim - Oil lubrication limit speed | 52100 tr/min |
| Nlim - Grease lubrication limit speed | 32200 tr/min |
| Preload level | GN |
| Preload value | 0,108 kN |
| Axial rigidity | 78,9 N/µm |
| Radial rigidity | 164,6 N/µm |
| Tmin - Min operating temperature | -20 °C |
| Tmax - Max operating temperature | 120 °C |
| FTF - Characteristic cage frequency | 0,409 Hz |
| BSF - Characteristic rolling element frequency | 4,799 Hz |
| BPFO - Characteristic outer ring frequency | 4,905 Hz |
| BPFI - Characteristic inner ring frequency | 7,095 Hz |
ABUTMENT | |
|---|---|
| da min - Min shoulder diameter IR | 24,5 mm |
| Da max - Max shoulder diameter OR | 37,5 mm |
| Db max - Max OR shoulder diameter | 39,5 mm |
| r1a - Max fillet radius | 0,3 mm |
| ra max - Max shaft & housing fillet radius | 0,6 mm |
