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Communiqués de presse 2010 - Modules de Préhension
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TENDOzero: To 0.000 mm in no time
05.10.2010 -
Micron precision is always required for drilling, reaming and line boring. Now SCHUNK, the competence leader in clamping technology and gripping systems, offers a hydraulic expansion toolholder, where a run-out accuracy of 0.000 mm 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 from an innovative family-owned company, even demanding applications with tight tolerances of shape, position and surface quality are carried out quickly and reliably.
Tool costs are reduced by up to 50 %
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. Interfering contours are optimized, the adjustment process is simplified and an excellent run-out accuracy is assured. With a Torx-plus key the angular position of the clamped precision tool is corrected and run-out is adjusted. Compensation of the spindle’s run-out errors is done directly at the machine. Machine, toolholder, and tool are perfectly aligned. When using high-quality tools with PCD or CBN cutting edges, quality and dimensional accuracy of the workpiece increases and the tool is protected from damage. Furthermore, the excellent vibration damping of the hydraulic expansion toolholder assures an even cut, and micro blow-outs at the cutting edge are noticeably minimized. Comparative measurements confirm that with TENDOzero tool service life is extended by up to 50 %, and the machine spindle is preserved.
Exact: Perfect run-out even if intermediate sleeves are used
The coolant supply of the cutting edge is sophisticated as well. Besides having conventional cooling from the outside, TENDOzero allows an internal coolant supply, and in a slightly modified version, the minimum quantity lubrification (MQL). With all these features, the "Zero-Micron-Toolholder" paves the way for modern, highly efficient reamers and drills. The clamping diameter can be reduced by up to 3 mm by using intermediate sleeves. The run-out accuracy of 0.000 mm is adjustable, too.
As for all SCHUNK hydraulic expansion toolholders, a simple Allen key is all that is needed for a quick tool change. The clamping screw is turned in to the stop and the tool shank is surface clamped. After every tool change, the run-out accuracy is readjusted to 0.000 mm again.
The precision mounting of the TENDOzero is available for the interfaces HSK-A 63 and 100, SK 40 and 50. BT 40 and 50, as well as for CAPTO C4, C5 and C6.
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