The production of wooden threads with a cutting stock and tap is described in great detail on Berthold Cremer's 
Website von Berthold Cremer website. The acquisition costs for these tools naturally increase proportionally with the nominal diameter. For example, if you want to rework the old height-adjustable stool (picture 1) in the traditional way, the right cutting equipment would probably exceed the €1000.00 limit! Since I don't own any such tools myself, I enthusiastically took the opportunity to make two spindles and the matching crosswood nuts during a visit to master wood turner Alfred Baumann.
Before I start turning the stools at home, I would like to take detailed photos of the threaded parts to show two identifying features of wood threads that were made with a cutting stock and tap:
(1) On the spindle thread you can see the typical work marks of the cutting knives (goat feet) at the end of the thread. The threads shown in Figure 3 were cut using a cutting stock with pre- and post-cutters. Since the two cutting edges are offset by 180°, the last half turn is always just pre-cut!
(2) The nut thread is usually cut into cross wood. Since the direction of the wood fibers constantly changes as the tap rotates, fiber tear-outs can hardly be avoided. The rough surface of the threads can be clearly seen in Figure 5. The strong chamfer was subsequently turned on in order to clean up the very deep gaps at the start of the thread. In order to prevent the rough, fibrous surface of the nut thread from getting caught on the screw when you first try out the fit and, in the worst case, making the whole work unusable, it is common - and important - to rub the threads of the screw thoroughly with soap beforehand!
When it comes to taps, a distinction is made between the German shrike and the French hollow drill ( Website von Berthold Cremer). Der französische Hohlbohrer liefert in den meisten Fällen ein besseres Arbeitsergebnis als der deutsche Würger. Trotzdem sind beide Werkzeuge für Langholz praktisch ungeeignet.
In seltenen Anwendungsfällen - z.B. zerlegbare Billardstäbe - müssen Innengewinde aber auch in Langholz geschnitten werden.
In a reprint of Hugo Knoppe's Drechserachbuch I found a drawing (Figure 5) and a description of a special tap for long wood: its cutting part is provided with a dovetail guide and can be removed for sharpening. This allows the cutting edge to be formed into a similar (goat's foot-like) shape to that of the cutting dies for external threads. Although such drills are hardly available these days, they prove once again the old rule: "It doesn't work" doesn't exist!
... and another Link:
The Beal Wood Threader replaces the bit of a die stock with a milling cutter. The nuts are cut with conventional taps.