It isn't too hard, Bill. You hold up a ruler next to your lead screw
and count the threads per inch and see if you get e.g. 8 for 1" 16 for 2",
96 for 12" .. GWE

Bill Janssen wrote:

I just got around to noticing a table for using the threading
indicator. The table
is the usual listing of indicator readings versus thread pitch.

However I just noticed that the thread pitch column is labeled TPI and
the threads
listed are all imperial threads.. I have reason to believe that the lead
screw is metric.

So my question is, where is the error? Is my lead screw wrong and I
should have
a Imperial or is the label wrong and no 9X20 was ever shipped with a
imperial
lead screw.

Confused
Bill K7NOM