Walter USA unveils thread mill with countersink

摘要

To thread a hole and countersink it in one operation, WALTER USA LLC,Waukesha, Wis., (www.walter-tools. com/us) introduced a new version of the Prototyp TMC thread mill with a 90° countersink. "A lot of times it's cost-prohibitive to order a step drill, for example, or have a separate countersinking operation," said Mark Hemmerling, Walter's director of marketing. Other enhancements include a wear-resistant and tough ultrafine-grain carbide substrate, a 27° helix with a shortened flute runout for effective chip evacuation when cutting a variety of materials, through-coolant for threads down to M4 and a multilayer TiCN coating that reportedly permits higher cutting speeds and longer tool life. The tools are also available uncoated and can produce threads from M3 to Ml 6. The tools have an aggressive rake angle and can thread material as hard as 48 HRC.