When to use plastic linear bearings and linear guides or recirculating ball systems?

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Linear bearings are machine elements that perform a linear movement. In this white paper, two linear guide concepts are compared: sliding on plastics as well as rolling by means of rolling elements made of steel balls. Both linear plain bearings and linear ball bearings take over the guidance and positioning in classic mechanical engineering as well as in automation. But when should we use a plastic plain bearing and a rolling bearing with steel balls?

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