Machined metal cages
Machined steel cagesMachined steel cages are normally made of non-alloyed structural S355GT (St 52) type steel in accordance with EN 10 025:1990 + A:1993. To improve sliding and wear-resistance properties, some machined steel cages are surface treated.
Machined steel cages are used for large bearings or in applications where there is a danger that season cracking, caused by a chemical reaction, may occur if a brass cage is used. Steel cages can be used at operating temperatures up to 300 °C (570 °F). They are not affected by the mineral or synthetic oil-based lubricants normally used for rolling bearings, or by the organic solvents used to clean bearings.