"Phil Kangas" wrote in message
...
I've got this Starrett center gauge no. C391. A very common
item
in toolboxes everywhere. So, can anyone explain the use of
this
gauge in particular the double depth of thread and also the
odd
scale that apparently is related to various pitches of
thread with
an associated decimal measurement. The 60deg v-notches are
self explanatory but the scales? The starrett web site is of
no help,
they just say the scales are 14, 20, 24 and 32nd's of an
inch. ok....?
phil

if you get the Logan "how to run a lathe" book, it will tell you exactly how
to use this.


** Posted from http://www.teranews.com **