The thread mills are said to virtually eliminate the possibility and consequences of tap breakage. Thread mills are available in both one-flute and three-flute versions, with the latter being suited for high-volume output needs. The thread mills remove manual operations by eliminating the need for hand tapping during full bottom-threading applications. Bottom threading can be performed to within 1 pitch. Externally supplied coolant eliminates the need for thread cutting oil, so parts and coolant reservoirs are not contaminated.
According to the company, the thread mills include an easily controlled pitch diameter and offer precise thread-depth controls to 2 × D, so that one tool can be used for both through and blind holes. Overall length of the thread mill is 1 5/8" with a shank diameter of 1/8".
Editor PickPCD Face Milling System’s Diameter Cuts Large Parts in Fewer Passes
The KBDM polycrystalline diamond (PCD) face milling system from Kennametal is designed for high-volume machining, with standard sizes ranging from 2.5" to 8.0" (63 to 200 mm) and cutter diameters ranging to 21.5" (550 mm).