How do I use the threading dial on a Logan or Wards lathe?
4.7.. For cutting an even thread such as 24 TPI, restart the cut with the dial set to any mark and it will restart the cut in the same place. For cutting an odd thread such as 5 TPI, restart the cut with the dial set to any number. For cutting a half thread such as 7-1/2 TPI, restart the cut with the dial set to to the same number every time. For example, if you made the first cut with the dial set to “2”, you must make every succeeding cut with the dial set to “2”. For a quarter thread like 12-1/4 TPI or metric threads, you must leave the half nuts engaged and reverse the spindle at the end of each pass. (Note, if cutting a thread divisible by 8 (8, 16, 24, 32, 40 TPI etc.) the threading dial is not needed at all. The half nut can be engaged at any point) Back to top This document was prepared with an incredible amount of help by Robert Neidorff. Logan Actuator would like to express our deepest appreciation for his assistance. Version 1.02 Last updated September 29, 2007 Copyright 200
