What Is a Chuck on a Lathe?

What is a chuck on a lathe?

Chuck is a mechanical device on a machine tool used to clamp the workpiece. A machine tool accessory for clamping and positioning the workpiece by the radial movement of the movable jaws distributed on the chuck body.

Chuck is generally composed of chuck body, movable jaw and jaw drive mechanism 3 parts. Chuck body diameter of the minimum 65 mm, up to 1500 mm, the central hole to pass through the workpiece or bar; The back has a cylindrical or short conical structure and is connected with the spindle end of the machine tool directly or through the flange. Chucks are usually mounted on lathes, cylindrical grinding machines and internal grinding machines. They can also be used in conjunction with various indexing devices for milling and drilling machines.