This linear motion closed type slide unit has an 8 mm inside diameter. The slide unit, designed to carry a component, has a housing with a flat mounting face and four tapped bolt holes, and circle clips at each end to retain the ball bushing. Ball in the cage loop to run a smooth ball guide surface to ensure even if high-speed operation, low noise. 

The 250 mm Linear Slide Set from Studica Robotics provides high-precision, low-friction linear motion — perfect for robotics, automation systems, and STEM builds. With a stainless-steel guide rail and ball-bearing block, this slide rail kit delivers smooth, repeatable motion for lifts, arms, linear actuators, or any mechanism requiring reliable linear travel.