Bearings for underwater applications

Plastics Bearings—
A more recent development has been the use of Acetal resin rollers and balls in applications where abrasive, corrosive and difficult-to-lubricate conditions exist. Although these bearings do not have the load carrying capacity nor the low friction factor of their hard steel counterparts, they do offer freedom from indentation, wear, and corrosion, while at the same time providing significant weight savings of additional value are:

1) their resistance to indentation from shock loads or oscillation;
2) their self-lubricating properties.

Usually these bearings are not available from stock, but must be designed and produced
in accordance with the data made available by the plastics processor.