Howa Machinery provides different types of power chucks such as a general purpose non-through-hole type, a hollow type with a central through hole, a draw down type that grips the workpiece by the end faces and draw it down for the purpose of finishing, a power change type for use if the worpiece has low rigidity, a swing lock type for rough processing, and a compensating type which is ideal for clamping with reference to the center hole of the workpiece. In order to get the most effective and lasting use from a power chuck, it is extremely important that you select the correct power chuck for your purpose.