SKF single row tapered roller bearings are fitted with one of the cages shown as below:

Cage type	Window-type, roller centred
Material	Stamped steel	PA66,  glass fibre  reinforced	PEEK,  glass fibre  reinforced
Suffix		TN9	TNH

The standard stamped steel cage is not identified in the bearing designation. If non-standard cages are required, check availability prior to ordering. When used at high temperatures, some lubricants can have a detrimental effect on polyamide cages.