• Concept Engineers

Chuck & Arbor

Concept Engineers is engaged in the manufacture and export of premium quality hydraulic expanding mandrels, hydraulic chucks and other products. The diagrams illustrate a chuck and an arbor manually actuated by a screw. The piston is advanced by clockwise rotation of the actuator screw. The hydraulic fluid is displaced in the piston chamber and moved through the parts exerting pressure on the steel sleeve. This equalised internal pressure is contained within the hydraulic seals compressing/expanding the sleeve radially about the workpiece or tool. The sleeve when further compressed/expanded conforms to the shape of the workpiece or tool providing accurate centring and maximum holding power. This clamping force can assume very high values since the inner wall of the expansion sleeve is many times greater than the face of the piston. Counter clockwise rotation of the actuator screw releases the hydraulic pressure and relaxes the sleeve for unloading and loading of the tool or workpiece.