Depending on bearing series, design and size, SKF single row deep groove ball bearings are fitted as standard with one of the following cages (fig 1):
- a pressed ribbon-type steel cage, ball centred, no designation suffix (a)
- a pressed ribbon-type brass cage, ball centred, designation suffix Y
- a riveted pressed steel cage, ball centred, no designation suffix (b)
- a riveted pressed brass cage, ball centred, designation suffix Y
- a machined brass cage, ball centred, designation suffix M (c)
- a machined brass cage, outer ring centred, designation suffix MA
- an injection moulded snap-type cage of glass fibre reinforced polyamide 66, ball centred, designation suffix TN9
Bearings having a pressed steel cage in standard execution may also be available with a machined brass injection moulded snap-type cage of polyamide 66. For higher operating temperatures, cages of polyamide 4,6 or glass fibre reinforced polyetheretherketone (PEEK), designation suffix TNH, may be advantageous. Please check availability prior to ordering.
NoteDeep groove ball bearings with polyamide 66 cages can be operated at temperatures up to +120 °C. The lubricants generally used for rolling bearings do not have a detrimental effect on cage properties, with the exception of a few synthetic oils and greases with a synthetic oil base and lubricants containing a high proportion of EP additives when used at high temperatures.
For bearing arrangements, which are to be operated at continuously high temperatures or under arduous conditions, SKF recommends using bearings with a pressed steel or a machined brass cage.
For detailed information about the temperature resistance and the applicability of cages, please refer to the section Cage materials.