Widia GTD

Widia GTD CNC Thread Mill Programming


Proper Tool Selection

The Widia GTD Tool Selection Guide will direct the tool engineer to any number of tools that can mill a given thread. However, the best tool is any tool that will machine an optimum number of holes over a given length of time... consistently.

From the Tool Selection Guide, the one formula to remember for internal threading is never use a tool diameter that is larger than 70% of the major thread diameter to be produced. This will insure the tool will not "heel" or rub the flanks of the thread or interfere with the helix angle of the thread.