If the elements used to guide components in the production process (guide gibs, guide pins, guide pulleys, etc.) become worn, their positioning accuracy is no longer guaranteed and inaccuracies gradually creep into the process. In many cases, abrasion of guide elements is undesirable. Depending on the material, this means that metallic or non-metallic abrasion of the guide gib can soil, contaminate or even damage the guided part.
This is why rivets or screws are guided through a ceramic tube to hold them precisely in position for hardening by means of inductive heating.