Does the insert have its own bearings or is the Dremel driving the mills spindle? Does the article discuss the effect of the load on the Dremel spindle bearing due to belt tension and on the motor due to start-up inertia? The Dremel is kinda under-powered as is, driving another set of bearings as well will not leave much umph for the cutting tool. What's the advantage? Why not just use the Dremel direct?
Phil
Originally Posted by Regnar  Neat. You might also find this months Home Shop Machinist interesting too. They take a dremel tool and make a spindle insert for it to run |