Solid Carbide Tch Double Margin Long Drills

Accusharp Solid Carbide TCH Double Margin Long Drills reduced 80% cycle time as compared to Conventional deep hole drilling. Double margin drills have a second margin ground behind the main margin. The trailing margin burnishes the cavity, making a true hole and smoother finish while providing a more accurate, rounder drilled hole and frequently eliminating the need for reaming. HSN2-based coating with high hot hardness allows 30% higher cutting speeds and constant tool life. Four-margin lands improve hole straightness and hole alignment when drilling through cross holes.