880-D0770L50-04 77.00mm CORODRILL

Hole depth: 4x Dc. Cylindrical shank - flat according to ISO 9766.

Stronger drill body with new surface treatment can withstand higher feeds. Wiper geometry for best surface finish. Optimized chip channels for accelerated chip evacuation. Easy identification due to laser marking with drill-, insert- and screw codes on the drill shank.