SKF single row cylindrical roller bearings are fitted with one of the cages shown as below.

When used at high temperatures, some lubricants can have a detrimental effect on polyamide cages.

Cage type	Window-type roller centred outer ring centred	Window-type,  roller centred	Window-type,  inner or outer ring  centred (depending  on bearing design)	Riveted roller centred outer ring centred inner ring centred	Window-type,  inner or outer ring  centred (depending  on bearing design)	Riveted roller centred outer ring centred inner ring centred
Material	PA66, glass fibre  reinforced PEEK, glass fibre  reinforced	Stamped  steel	Machined brass	Machined brass	Machined light alloy	Machined light alloy
Suffix	P or PH PA or PHA	–  J	ML	M MA MB	LL	L LA LB
Metric  bearing	Standard	Standard	Standard	Standard	Standard	Standard
Inch  bearing	–	Standard	–	Standard	–	–