I recently visited a shop where they were using a bench grinder to sharpen their electrodes and I have decided to copy their set-up for myself. Their grinder was set-up with a sharpening wheel on one side (fine grit, I suppose?) and a soft wheel with grooves of various widths on the other side for finishing the electrode smooth. Any idea what the grooved wheel is called? A few hours of searching the internet has not turned up anything. Also, can anyone recommend a specific wheel for doing the sharpening? One friend gave me the advice of going with 120 grit, but all the wheels I seem to be coming across are only "fine, medium, coarse", so I assume "fine" is what I'd want? This is for a 8" bench grinder with a 5/8" spindle.
Thanks in advance.