GG's:


An incannel gouge seems to be an interesting piece of geometry.  Just exactly
what is the ideal geometric shape of the bezel?


My view is that the ideal shape is an annular section of a cone.  I base this
upon observation of an amazing tailed apprentice once used in pattern shops. It
had several different water-mist-cooled stones on various spindles.  There were
two conical stones which were for sharpening incannel gouges, at least that was
what I surmised from examining the tool rests.


(I saw this at a used machine tool dealer about 25 years ago.  The machine
looked like it weighed a hundreds of pounds. It definitely took up beaucoup
floor space.  I passed it up.)


Sharpening with an abrasive rod of the same radius as the gouge, held at an
angle, will give a different bevel angle at the sides, no?


You could get around this by using an abrasive rod with a radius smaller than
the radius of the gouge, and manipulating it to get an approximately conical
bezel.


Whatever works, works - perhaps I'm being too mathematical (geometrical?) here.


John Ruth