[QUOTE=Mook;229639I'm still looking for conclusive proof that setting the part at the helix angle still produces a correctly formed thread with the tool form not square to the thread axis. When thread grinding with large diameter wheels set at the helix angle for clearance, the wheel form is modified to suit. This suggests the tool should not be a true thread form if the part is tilted off square.[/QUOTE]

Given the relationship of a single point cutter to the work and the type of thread created, I would think this method is just moving stuff that is stationary and leaves stationary stuff that moves.