If you are dealing with the maximum plane-parallelism, i.e. the parallelism of the end faces to each other, then draw-down chucks are used. The workpiece is automatically drawn down into the chuck a little along the axis of rotation. In the process, it lies on the stop on the inside of the chuck and aligns itself that way.
KBF-N
Power chuck with draw-down and ball lock principle for internal and external clamping for high plane-parallelism
Ø 170-400
ZFM
Draw bar system for external clamping for minimization of axial run-out errors with the highest speeds for changing geometries
Ø 160-315
