The 8mm ID x 24mm Length Linear Ball Bearings are built to run on 8mm stainless steel shafting. The internal carriage contains a series of balls that cycle through as the bearing traverses up and down the shaft, it is installed on to provide a low coefficient of friction. The seals at each end keep ingress of dust and debris to a minimum for long service life. These bearings can be mounted with 15mm bore clamping mounts.