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The tools of PRAMET Tools for hole machining traditionally contain tools with indexable cutting inserts, the design of which has been adapted to achieve a better solidity of the tool.
Since July 2014PRAMET Tools has been a distributor of DORMER tools. The DORMER tool assortment has significantly enlarged the tool portfolio not only for hole machining.

 

Drills with indexable cutting inserts

 

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The assortment of drilling with indexable drills offers tools in a wide selection of diameters for drilling depth from 2xD to 4xD. The drills can be used as a rotary or stationary tool. The drills are single edge and may also work outside axis. It is possible to adjust dimension of the drilled hole within -0.2 to +0.5 mm using an off centred tool. The drills work without problems even under unstable conditions of interrupted cut.

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Every square drilling insert offers 4 cutting edges. Their full applicability is achieved by different geometry and grade of internal and external insert. Internal insert, which must cut in the middle of the drill at zero cutting speeds, is made of tough grade with a very strong chipbreaker. On the other hand external insert is wear-resistant and enables to increase cutting speed at periphery of the tool up to double speed in comparison with solid drills. The right choice of the peripheral insert gradecan thus ensure high productivity and life of the tool.

 

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