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If you have an application that has no tolerance for lubrication, you need lubricant free bearings. Most lubricant free bearings are plastic bearings. Plastic bearings are not low quality bearings. In fact, they are just as strong and as durable as steel bearings, or bearings made of other materials, depending on how they are used and what their overall function is. Depending on the application, lubricant free bearings can also be made of stainless steel. Stainless steel is typically preferred when other types of chemicals are also used, which may cause plastic bearings to corrode. Talk with a Tok Bearing dealer today to find out which type of material you need for your lubricant free bearings.