Hydraulic Expansion Toolholder features 0.00 mm run-out accuracy.

Press Release Summary:

TENDOzero directly integrates 4 lateral set-screws, which directly affect tool shank, so that, with Torx- plus key, angular position of clamped precision tool is corrected and run-out is adjusted. Compensation for spindle's run-out errors are done at machine, and vibration damping promotes even cut while also minimizing micro blow-outs at cutting edge. Features include conventional cooling from outside, internal coolant supply, and minimum quantity lubrication (modified version).

Original Press Release:

TENDOzero for Micron Precision

Micron precision is always required for drilling, reaming, and line boring. SCHUNK now offers a hydraulic expansion toolholder with a run-out accuracy of 0.00 mm which can be quickly adjusted. The TENDOzero is equipped with four lateral set-screws, which directly affect the tool shank, the angular position of the tool is corrected, and run-out is precisely adjusted. With this precision toolholder, even demanding applications with tight tolerances of shape, position, and surface quality are carried out quickly and reliably.

In contrast to conventional solutions which work with compensation adapters or rings, the set-screws of the TENDOzero are directly integrated into the precision mounting. With a Torx- plus key, the angular position of the clamped precision tool is corrected and the run-out is adjusted. Compensation for the spindle’s run-out errors are done at the machine. The excellent vibration damping leads to an even cut and minimizes micro blow-outs at the cutting edge.

Besides having conventional cooling from the outside, TENDOzero also has an internal coolant supply, and in a slightly modified version, the minimum quantity lubrication (MQL).

The precision mounting of the TENDOzero is available for the following interfaces: HSK-A 63 and 100, SK 40 and 50, BT 40 and 50, CAPTO C4, C5, C6, CAT 40, and CAT 50.


SCHUNK is the worldwide competence leader for clamping technology and gripping systems. Totaling more than 60 years of experience, SCHUNK is a family owned operation and a global player in one. For more information, visit www.schunk.com

Media Contact

Alexandra Altvater

Marketing Coordinator



Technical Contact

Matt Panosh

Group Manager Tooling


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