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Wirtgen HT22 Quick-Change Toolholder System for efficient Milling Performance

WINDHAGEN/GERMANY, January 23, 2014 - Cutting technology is a core competence of Wirtgen and the heart of its cold milling machine technology. With its HT22 quick-change toolholder system, Wirtgen has launched a new development onto the market that minimizes downtimes and increases the service life of the milling drum.

Wirtgen HT22 Quick-Change Toolholder System

Changing a milling drum toolholder quickly and directly on the job site! The HT22 quick-change toolholder system offers longer service intervals with lower servicing requirements. | picture: Wirtgen

A longer service life and fewer downtimes are achieved by various optimizations, such as the significantly enlarged contact areas between the upper and lower parts. Consequently, the high cutting forces are reliably transferred to the lower part of the quick-change toolholder system, substantially increasing the useful life of the milling drum.

A larger shank cross-section and the optimized shank geometry increase the strength of the shank, thus providing greater resistance to undesired deformation. Additionally, the maximum longitudinal wear of the upper part of the toolholder has been doubled in relation to that of the conventional version. And last but not least, the higher pretensioning forces resulting from an optimized screw position provide for the reliable system pretensioning of the upper part in the toolholder's lower part. Service intervals have now been extended from 250 hours to 500 hours thanks to the system's overall more robust construction.

All new Wirtgen cold milling machines have been equipped with the new HT22 quick-change toolholder system since October 2013. Machines put into service earlier can easily be retrofitted with the new system, providing customers with the ideal tools for future milling jobs.