Permissible operating temperatures for PA66 cages with various bearing lubricants
| Lubricant | Permissible operating temperature1) | |
| – | °C | °F |
| Mineral oils | ||
| Oils without EP additives, e.g. machine or hydraulic oils | 120 | 250 |
| Oils with EP additives, e.g. industrial and automotive gearbox oils | 110 | 230 |
| Oils with EP additives, e.g. automotive rear axle and differential gear oils (automotive),
hypoid gear oils |
100 | 210 |
| Synthetic oils | ||
| Polyglycols, polyalphaolefins | 120 | 250 |
| Diesters, silicones | 110 | 230 |
| Phosphate esters | 80 | 175 |
| Greases | ||
| Lithium greases | 120 | 250 |
| Polyurea, bentonite, calcium complex greases | 120 | 250 |
| For sodium and calcium greases and other greases with a maximum operating temperature ≤ 120 °C (250 °F), the maximum temperature for a polyamide cage is the same as the maximum operating temperature for the grease. | ||
- 1) Measured on the outside surface of the outer ring; defined as the temperature that provides a cage ageing life of at least 10 000 operating hours.
