When drilling very deep holes, it’s important to allow enough stock for clean up after a worst-case runout of 0.001 in. per inch. A part that is 180 in. long should allow more than 0.180 in. for clean ...

This self-centering, solid-carbide drill from Seco-Carboloy is TiN-coated for long tool life and employs a special edge design that aids in chip evacuation. Perfomax indexable insert drills feature a ...