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Single flute gundrills

Gundrilling process

The characteristic of the single flute gundrilling process is that coolant is fed through the coolant hole in the tool and exits along with the chips in the V-shaped groove (flute) on the drill tube from the drilled hole. The coolant also provides lubrication
to the drill periphery.

This is possible if coolant, i.e. deep-hole drilling oil or emulsion (min. 10 - 12% concentration, with additives), is provided in sufficient quantity and pressure.

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