Is there any machine that would make grinding out a curve in order to hold round bar any easier/quicker?
I'm a little late with a reply. Work too much-visit too little! From your pictures, it looks like you are trying to hold round stock in position. When I was working as a machinist-we always secured round stock for milling with v-blocks in our milling vise. It automatically centers, and in your case, changing the tops of your stands to a "v" with plate-it will handle different sizes of round stock without changing anything. Just my opinion. Always looking for a better way to do it!