Gundrills With Improved Chip Flow

The line of gundrills features improved chip evacuation at high penetration rates, thanks to two processes applied in manufacturing.

The line of gundrills features improved chip evacuation at high penetration rates, thanks to two processes applied in manufacturing. Electro-polishing of the tubes gives the flute area a 4 Ra surface finish for a noticeable increase in tool life, feed rates and chip evacuation. The inside of the coolant channel is also polished, which is said to reduce coolant turbulence at the braze transitions, resulting in a smooth channel and a more consistent flow at the cutting edge. Black oxide is applied on the inside of the coolant channel and the outside tube and flute to further improve chip flow.