08-12-2018, 03:04 PM
(08-12-2018, 02:16 PM)Reckless Rat Wrote: Cutting threads (imperial) on the Myford doesn't involve having to stop or reverse the motor, although to do it your lead screw has to be fitted with the thread indicator accessory. Cutting METRIC threads however does involve reversing or rewinding the lead screw manually because if you disengage you lose the correct mesh. This is due to metric thread gauges being different from imperial. HTH.
B
Bruce, it depends wether you have a Myford with an Imperial or Metric leadscrew. Imperial threads and imperial leadscrew, use the thread indicator, Imperial threads and Metric leadscrew (using the conversion gears) you would need to reverse the motor etc for each cut.
Cribbed from Home Machinest:-
Even number threads can be engaged on any line or numbered line. Odd threads can be engaged on any numbered line OR on any line. For odd numbered threads, once you start with numbered lines you can only use any numbered line and the same is true if you start by using the non-numbered lines. For 1/2 numbered threads and 1/4 numbered threads such 11-1/2 or 4-1/4 it is easiest to remember to use the exact number or mark for each engagement.
Bob