Hi Steve
My second spindle moulder is an SM3 but mine certainly doesn't appear to have the removeable top piece and cutter holder you need for holding a router cutter (and it is a blue 'un, so not that old - now I'll have to go take a look see again, not had it long, see), so the question is whether or not this is a recent change to the spec. or a factory new build option. The top spindle speed of the SM3, however, is only 7500 rpm - a bit slow for router cutters, even big ones. The only spindle moulders I know of which can do "proper" router cutter speeds are the Felder and the Moretens. Felder list an optional high speed spindle for their spindle moulders which can run up to 15,000 rpm (on moulders with electronic speed controllers) - not cheap. The
Moretens MF30 machine is a completely different beast - it will work as a conventional or tilt-arbor spindle moulder and the motor/spindle unit will invert allowing it to be used as an overhead router (at speeds up to 14,000 rpm). Frankly, though, it would be cheaper to either set-up a DW625 in a router table or buy a secondhand pin router and have the spindle as well for work such as profiling and rebating.
Scrit