Originally Posted by
Slaninar
Cut spokes, with new threads cut, are weaker than new spokes - because material is removed. Penny wise pound foolish English would say.
As CliffordK mentioned, spoke threaders roll the threads onto a blank spoke, that is cut to the proper length. The Phil machine does this quite neatly, in one operation. The Cyclo/Hozan ones require you to trim the spoke before rolling the threads, IIRC. Rolling the threads work-hardens the threaded portion, so it is actually stronger after the threads are made.