There is a vast range of linear motion products on the market and it can be difficult to know which product to select. Kate Harden of Euro-Bearings discusses the various types of products available and explores their advantages, disadvantages and limitations The primary purpose of linear motion products is to move something from one place to another in one direction along a straight line. Usually this is achieved using a bearing with a rolling element. Traditionally this rolling element would be a ball or roller, but these days some linear motion bearings do not incorporate a rolling element and consequently are known as 'plain' bearings. These plain bearings are simply plastic or ceramic bushes and are sometimes lined with PTFE or oil impregnated plastic to help reduce the sliding friction.
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