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 PickHitting the Coolant Sweet Spot
Toolholders with integrated cutting fluid delivery channels offer threaded, fixed-position nozzles that direct parallel streams of coolant to pre-defined positions at the top of the cutting tool.