Originally Posted by
fietsbob
If they can Roll in the thread, there will be metal displaced rather than cut out..
it's how spokes are threaded , the valley pushed down moves metal up to form the peak.
Just make sure that if you use a quill stem it's long enough
to have the wedge down far enough to be below the threaded portion..
You fail to grasp the essential s of thread rolling.
As you point out rolling raises threads, which is useless here since the OD is already 1". If it were possible to roll a thread here (not impossible, but very difficult on a thin walled tube) the OP would end up with a thread greater than 1" in OD. The problem isn't the OD or even if threads could be cut, it's (maybe) wall thickness and ID so how the threads are produced doesn't matter.