In 2007 Jenkins switched to Rexroth Linear Guides as our standard linear bearing and rail system. Since then, we have over 99% of them still functioning in the field. The superior sealing system keeps the dust out and the grease inside the bearing. We also use a cover strip instead of hole plugs to give a more uniform surface on the top of the rail to further improve the effectiveness of the seals. The effectiveness of the seals also requires less maintenance and grease. These will be the last bearings and rails you will put on your machine. If you have a particularly problematic linear bearing axis, let us quote you a superior product for your application.