Linear bearings are made from a cage in which the balls are guided together with the raceway segments and the seals or shields. Linear bearings are able to withstand heavy loads and work well with closed or adjustable housings. W.M. Berg makes high quality linear bearings from chrome steel or stainless steel with outer sleeves hardened. W.M. Berg also has adjustable diameter series of linear ball bearing in chrome steel with outer sleeve hardened. W.M. Berg also manufactures open style linear ball bearings with outer sleeve hardened balls and a hardened steel ball retainer. All W.M. Berg products are of the highest quality and are meant to satisfy your precision parts needs completely. W.M. Berg technicians and engineers will work to customize linear bearings to fit your individual needs as well.