Metric Cobalt 338 DIN Length
Type XGT-J Metric Cobalt DIN 338 Length
— Heavy–duty wide land parabolic.
— Allows deep hole drilling without drill retraction.
— OAL & Flute length of DIN 338 Length drill are shorter than an inch Jobber drill.
— Manufactured from M42 HSS containing 8–percent cobalt.
— Recommended for wide range of steels, castings & other hard metal
drilling application.
— Proudly manufactured in the USA
with globally sourced material
PDF — Type XGT-J Metric Cobalt DIN 338 Length
Due to its function as a channel system, the profile of flute promotes chip absorption and removal. The wider the groove profile, the better the chip absorption and removal.
Poor chip removal means a higher heat development, which in return can lead to annealing & ultimately to breakage of the twist drill.
Wide groove profiles are flat, Thin groove profiles are deep. The depth of the groove profile determines the thickness of the drill core. Flat groove profiles allow large (thick) core diameters. Deep groove profiles allow small (thin) core diameters.