Max, the only use that I'm aware of where a router is used as a lathe cutting tool is to make spirals,flutes and barley twists, in which case an ordinary lathe is not used, but what is commonly called a router lathe where the router sits on a platform which is connected by a cable to the headstock, which has 36 index points and the router is moved along which rotates the headstock. The ratio of router movement to headstock rotation is altered by a stepped headstock pulley. For flutes, the cable is disconnected and the router traversed at the selected depth of cut, this is where the indexing comes in to decide how many flutes to cut. The distance between head and tail-stock is commonly a little over three feet.
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