Good point, TGB.
I remember "concave" or "hollow ground" edges from the early 1970s. They were quite the rage with woodworkers. Once the initial edge was ground, final sharpening and several resharpenings required only sharpening the apex and the very back of the bevel. This was quite a saving in sharpening time and labor.This predated the Tormek.
My 1972 vintage six inch Craftsman dry grinder is typical of grinders of that era. The hollow grind is easy to see and easier to see as the wheel wore down.
The larger ten inch (250mm) diameter Tormek wheels technically also produced a hollow grind, although the larger diameter made the very small hollow almost invisible. Also, the cool running water grind of the Tormek made the entire process possible under power.
In my opinion, and some will think differently, the concern about concave or hollow grinding is a leftover from the past.
Ken
I remember "concave" or "hollow ground" edges from the early 1970s. They were quite the rage with woodworkers. Once the initial edge was ground, final sharpening and several resharpenings required only sharpening the apex and the very back of the bevel. This was quite a saving in sharpening time and labor.This predated the Tormek.
My 1972 vintage six inch Craftsman dry grinder is typical of grinders of that era. The hollow grind is easy to see and easier to see as the wheel wore down.
The larger ten inch (250mm) diameter Tormek wheels technically also produced a hollow grind, although the larger diameter made the very small hollow almost invisible. Also, the cool running water grind of the Tormek made the entire process possible under power.
In my opinion, and some will think differently, the concern about concave or hollow grinding is a leftover from the past.
Ken