Material: Chain wheels made of steel, with hardened teeth. Chain made from steel, with clip link. Casing made from aluminium, yellow painted, with o-rings. The couplings are delivered unassembled. The chain wheels are with pre-borehole. The chain and the chain connection link are unmounted. Before using, the casing has to be filled by the customer with grease. -Elastic transmission of torque. -Fast declutching by simply loosening the chain. -Shafts do not need to be exactly aligned. -No axial shaft clearance permissible. Temperature range: -30°C to +220°C.