The Dormer Drill Bit is a long series drill with straight shank. It has diameter of 15.5 mm with an overall length of 227 mm and flute length of 149 mm according to DIN 340 standard with 118 degree point angle. The conventional 118 degree point provides strength and means an easy point to regrind. This drill bit HSS with steam tempered finish for 6xD drilling without pecking in steel. Very cost effective
For drilling deeper holes
Suitable for both hand held and machine drilling
Steam tempered finish retains cutting fluid and prevents chip to tool welding