As long as it is running true. Mostly the advantage is way less wheel breakdown.

I may be able to hunt down some old photos of the inside but basically it has two racks that pivot in their centers. One rack is driven by the crank handle and the other rack drives the spindle. When you rotate the top plate you are actually rotating the two racks with respect to each other. So in what extreme there is a one to one ratio of the crank handle to axial movement of the spindle. At the other extreme (rotating the top plate 90 degrees) there is a one to one ratio of the crank handle to radial rotation of the spindle. Thus all sliding and no rotation or all rotation and no sliding. As you then back off the plate from either extreme you get various combinations of axial (sliding) along with radial (rotation). Since it is continuously variable you can set any combination of the two which equate to any spiral pitch angle. Very neat!

​@@gerlacr Could there be a photo of the interior please? What are the smallest cutters that can be ground on it? I'm deciding between the Airflow Fixture and this one.

@@ivosekryntyntin2737 There is no theoretical limit on the small sizes but practically speaking I would think that it would be difficult to sharpen anything down in the 3/16" and 1/8" range. The friction of the gears and rack make the movement a bit jerky for some settings. Perhaps with some practice and care it might be practical on those smaller sizes. I have pics of the guts but I do not know how to attach them to these messages.