On 01/09/2019 07:07 AM, Jody wrote:
Bill,
Are you happy with PD thread wires?
It says made in the USA by Fischer Scientific.
Really, these things are not rocket science. They are a set
of centerless-ground rods of specific diameters, and a paper
chart. (Or, you can do it with a simple equation.)
As long as the rods are accurate on diameter, there just
isn't that much to it, and you can check the diameters with
the same mike you use to measure the thread if in doubt.
If your threads are coming out rough, then you may need to
make a few measurements at different spots and average.
Some tweaking of speeds, number of threading passes and tool
geometry may help the finish of the threads. And, of
course, certain mystery metal may never give nice threads.
Jon
