Checking My Nuts

[DaveH]

(04-26-2015, 09:38 PM)Dr Stan Wrote: I was taught, back in the stone age, one could engage even threads on any line, numbered or unnumbered.  However, this was using threading dials that were numbered one through four (90 degrees apart) with unnumbered lines half way in between each numbered line.

Just to put this in some sort of perspective I was also told I could engage even threads on any line .............. and it was true because the dials on the lathes then only had 4 marks (lines) usually numbered 1,2,3,4.   The problem arises because the dial on most lathes now have 8 marks (lines) so any of the old text books that say use any line really refer when the dial on the lathes only had 4 lines.
This is where the most of the confusion comes in, until one decides to cut a metric thread  that is


DaveH