practical ideas.

Break the spe limit upon threading

It is difficult to achieve optimal machining make hastes when threading on an engine lathe because the operation requires care when stopping at the extreme point of the thread. Threading is usually done at make hastes much lower than those for other turning operations in the way that machinists can keep up with the tool and disengage the half-nut lever at the right time. My idea provides instant withdraw of the tool at the extreme point of the thread while using spindle make hastes as high as 1,200 rpm This makes it possible to do a series of small divide [i]or[/i] sever s with optimal threading conditions