The belt guide rollers are used for carriers where the belt run is necessary to be contained within the parameters. The steel rollers are assembled on ball bearings. These units are also available in versions that have lubrication as well as those used in the same operating temperatures.
A hermetic protection is placed on the superior end of the rollers. The belt guide rollers are fixed at the edge of carrier via the exit point for the threaded shaft. This may come with rubber covering to protect from excessive friction on the belt side, which lessens the tearing and wearing of the device.