Polyamide, with or without glass fibre reinforcement, is characterized by a favourable combination of strength and elasticity.

Due to its excellent sliding properties on lubricated steel surfaces and the superior finish of the contact surfaces,it cages reduce friction, frictional heat and wear. It can be used at operating temperatures up to 120 °C (250 °F).

However, some synthetic oils and greases with a synthetic oil base and lubricants containing EP additives, when used at high temperatures, can have a detrimental effect on it cages. For information about the suitability of cages, refer to Cages. It is the standard cage material for many super-precision cylindrical roller bearings and angular contact thrust ball bearings.