Schunk has launched a new Prismo
tool grinding toolholder.With its
variable clamping diameter, a
threefold prism guidance and intermeshed
chuck jaws, the all-purpose
mounting achieves repeat accuracies
of less than 0.005mm. This enables
the device to almost completely avoid
tube unbalance, delivering suitable
pre-conditions for automated
manufacturing of small batch sizes.

A threefold prism clamping
provides the basis for the toolholder
to clamp shaft diameters from 5 to
20mm with precision. Each of the five
chuck jaws is guided by an eroded
double prism. A third prism is eroded
on the clamping face and this directly
contacts the tool shank. This ensures
the toolholder always adjusts itself to
the individual tool diameters. Even
deep hole drills and tools with a twist,
can be machined precisely.