Carbide drills that claim to provide 40 percent productivity gains in carbon steels under 28 Rockwell C and 30 percent gains in stainless steel are available. The SE210HP, SE211HP, and SE212HP drills in grade KC7515 feature free-cutting high positive rake angle and a patented sculptured edge drill geometry that cuts faster because it avoids the deformation produced by other drills. The points of the new drills are coated with titanium nitride using a physical vapor deposition process, which means they are capable of machining at surface speeds. The drills incorporate the patent-pending HP point geometry providing 20 percent less thrust and straight cutting edge that promotes even wear across the drill face. The drills are offered in Grade KC7515, which has a multiplayer advanced PVD coating increasing hot hardness and drill surface smoothness and enabling higher cutting speeds. The drills handle a range of materials including common steels, stainless steels, and high temperature alloys at a reduction in cost per hole. The drills are available in metric sizes from 4 mm to 21 mm diameter and inch sizes from 0.1563 in. to 1.010 in. in lengths of 3, 5, and 7 times the hold diameter. Self-centering capability and rigidity of the drills prevent it from wandering or walking at the beginning of the cut. As a result, the drills produce consistent, concentric holes.

Kennametal Inc.
www.Kennametal.com