Are plastic bearings waterproof?

Yes. Unlike metal bearings, plastic bearings resist water and corrosion. As plastics have low moisture absorption, it means they will not easily swell or impact the equipment they are used in. Many plastic bearings have PA66 nylon retainers. PA66 does absorb more moisture than many other plastics so for very wet conditions, PE, PP or PVDF cage material can be specified. As plastic bearings can be run dry, there isn’t the problem of lubrication washout.

Still not sure? E-mail us at sales@smbbearings.com or call us on +44 (0) 1993 842 555.

Our determination to remain specialised gives us a high level of product knowledge, providing bearing and lubrication solutions to existing or potential customers, whether individuals or large corporations. We don’t just sell bearings, we help to solve your problems. - Chris Johnson, managing director of SMB Bearings.