Permissible operating temperatures for PA66 cages with various bearing lubricants

White Paper on bearing lubrication including the role of bearing lubricant, types of lubricants, lubrication methods

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. 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.

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