DIHART® Duomax – reaming with indexable insert technology


DIHART® Duomax


The fact that indexable insert technology can also be used for reaming is being proven by the KOMET GROUP and their special tools. The experiences they have gathered have now been used to develop the new DIHART® Duomax cutting ring generation.


DIHART® cutting rings™ for reaming basic bores and through-holes are already well established and - due to their cost-effectiveness - are often copied. They belong to the class of multi-blade modular tool systems which offer the advantage that the cutting rings are easy to change on the cutting ring holder. The user receives a finished, ground-to-size tool which requires no setting up or adjustment work on the individual cutting edges. The DIHART® cutting rings have a flexible diameter range and can be easily and accurately adjusted thanks to the special cutting ring holder. This enables wear compensation and ensures accurate bore dimensions.


With the DIHART® Duomax, the KOMET GROUP is now offering cutting rings with indexable insert technology, thus changing the pace of reaming in several ways. The indexable reaming inserts have two fully usable cutting edges. This means that users are really getting two multi-blade reaming tools rather than one. For each set of indexable inserts, this saves one retipping cycle, which reduces tool costs, required time, and logistics expenses. If - once the doubled tool life has expired - the DIHART® requires retipping, this can be done much quicker than in the case of brazed cutting rings, since there is no need for a heat treatment. This also results in a longer life for the basic bodies of the cutting rings, since they are no longer exposed to thermal stress. In addition, the precision and stability of the basic bodies have been improved by optimising the basic shape.


As in the case of deliveries of brand new tools, when retipping takes place, the indexable inserts are delivered ground and ready-for-use in the insert seat. Thanks to the typical indexable insert screw fastening, elegant and safe handling is guaranteed. The new generation of the DIHART® Duomax is compatible with the previous cutting ring range, which means that existing cutting ring holders can still be used. An additional advantage of indexable insert reaming technology is that it is highly flexible as well as being more cost-effective and faster. Diverse cutting material and coating variants enable the reaming tools to be individually modified to meet the needs of machining tasks and ensure that the most varied of materials can be processed perfectly. This means that, in the future, it might be possible to use coating variants that could not be used on brazed tools. The flexibility of the tools with regard to the range of cutting materials and coatings constitutes a significant increase in the productivity of reaming processes. In addition, tolerance and geometry changes can be accomplished quickly and with little effort. This means that users can react to product changes or new products faster than ever.

Press contact

Trade press:

Wolfgang Klingauf

+49 (0) 821.524693