The 850B dust cover for machine tool guide rail machining center is widely used in this field. Steel telescopic guide rail protective covers are widely used to effectively prevent the entry of chips and other sharp objects. Through certain structural measures and suitable scraper plates, the infiltration of coolant can also be effectively reduced. Our factory's steel telescopic guide rail protective cover can meet the constantly improving requirements of modern machine tools in terms of high technology, correct installation position, and high operating speed. The $r $n steel telescopic guide rail protective cover is made of high-quality 2-3mm thick steel plate cold pressed, and can also be made of stainless steel according to requirements.