ZL bolt chucks work with the technology of pull collets. Simultaneous radial and axial clamping creates a firm fit of the workpiece – in the jaws and on the stop. An air system check by the clamping device allows optimum monitoring of the workpiece contact. This enables you to achieve high concentricity and axial run-out accuracies. Ideal for the production of disc-shaped workpieces where plane parallelism is a quality criterion. The inclined bolt principle can also be applied to the internal clamping.