High precision angular contact ball bearing, laminated resin cage centred on outer ring
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 | 140 mm |
| D - External diameter | 210 mm |
| B - Bearing/Inner ring width | 33 mm |
| d1 - External diameter inner ring | 162,6 mm |
| D1 - Inner diameter outer ring | 198,094 mm |
| D2 - Inner diameter outer ring | 187,423 mm |
| a - Charge load application point | 57 mm |
| α - Contact angle | 25 ° |
| rs - Min fillet radius | 2 mm |
| r1s - Min fillet radius | 1 mm |
| Precision class | P4 |
| Mass | 3,42 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| C - Dynamic load | 128 kN |
| C0 - Static load | 144 kN |
| Cu - Fatigue limit load | 6,1 kN |
| f0 - Coefficient | 16.235 |
| Axial displacement K Factor | 0.38 |
| Preload level | 7 |
| Preload value | 1,65 kN |
| Axial rigidity | 450 N/µm |
| Radial rigidity | 949 N/µm |
| Tmin - Min operating temperature | -30 °C |
| Tmax - Max operating temperature | 120 °C |
| N lim - Oil lubrication limit speed | 9100 tr/min |
| N lim - Grease lubrication limit speed | 6000 tr/min |
| BEARING FREQUENCIES | |
|---|---|
| BPFO - Over rolling frequency on outer ring (60 rpm) | 10,271 Hz |
| BPFI - Over rolling frequency on inner (60 rpm) | 12,729 Hz |
| BSF - Over rolling frequency on rolling element (60 rpm) | 8,383 Hz |
| BRF - Rotational frequency – rolling element (60 rpm) | 4,192 Hz |
| FTF - Rotational frequency - cage (60 rpm) | 0,447 Hz |
| ABUTMENT | |
|---|---|
| da min - Min shoulder diameter IR | 150 mm |
| db min - Min IR shoulder diameter | 150 mm |
| Da max - Max shoulder diameter OR | 200 mm |
| Db max - Max OR shoulder diameter | 200 mm |
| r1a - Max fillet radius | 1 mm |
| ra max - Max shaft & housing fillet radius | 2 mm |
