Lifting-Door Arrester Set For securing the chain to the lifting-door frame. A spring-loaded brake employing friction resistance is triggered if the chain fails. It is screwed to the fastening elements of the Lifting-Door Bearing Sets.Lifting-door system with circulating chain A special design for ensuring precise movement of lifting door and counterweight. The motor can drive the lifting door at any Chain Reverse Unit. Where motors are fitted with brakes, a counterweight is not needed.
