• The welding of the disks on the chain decreases the strength of the chain steel because the
introduced heat changes the texture (fig. 4b). That is the main reason for conveyor defects
caused by broken disks. The problem could be solved by the usage of the new developed disks
shown in [1]. Due to point press welding of short bolts and the new design of the self-blocking
disks the danger of disk-breaking will be minimized.