Linear Motion Systems - Sealing

Cover bands are used on some units to protect them from the ingress of foreign objects through the opening in the profile where the carriage runs. The cover bands can be made of:

In the case of plastic, the cover band seals the profile by snapping into small grooves running along the carriage opening.

In the case of stainless steel, the cover band seals the profile magnetically using magnet strips mounted on each side of the carriage opening. Some units also have a self-adjusting cover band tensioning mechanism that eliminates any slack in the cover band that can occur from temperature changes, thus improving the sealing degree and the expected life of the cover band.