The Diebold-CentroGrip collet chuck series is reportedly a new development of the proven ER collet system. The concentricity of CentroGrip toolholders measured at the shank of the cutter at 3xd is now below 3µm. This means that the holder body, the collet and especially the clamping nut must be of exceptionally good accuracy. Now we have arrived at the point where we actually "split theµm." However, this is not self-evident. Runout accuracy of less than oneµm cannot be reached in a production environment that is not fully temperature controlled.

Diebold works exactly at 21 degrees all year round. The coolant of all grinding machines is also is temperature controlled to the same level. The quality inspection equipment that is sued is unique since the company is manufacturing its own taper inspection gages and master that put us on a high level of quality inspection capabilities. The skill of its employees that are involved in the manufacturing process for these products is just as unique, according to the company.