The BL QC-20C Robotic Tool Changer is a highly efficient pneumatic robotic coupler (master side) engineered for seamless automatic tool changing in industrial automation systems. Built to handle payloads of approximately 20kg, this master plate features a robust locking mechanism equipped with side adjustment screws to ensure secure, highly repeatable coupling. It provides comprehensive electrical and pneumatic pass-through capabilities, integrating a DB25 (D-Sub) connector and a pigtail cable with a 4-pin connector. The precision-machined mating face utilizes a circular array of electrical spring pins and durable pneumatic sealing rings, guaranteeing reliable signal transmission and airtight connections during demanding robotic operations.