I got the Mitutoyo indicator to replace my HF dial indicator on my lathe. The HF indicator has performed quite well for a couple of years on my carriage stop, but the plastic lens was getting burned by hot chips, and it got broken somehow. I have no idea how.
But since it is fix guage day at Shootys house, I figured that I would keep on keepin on. I had to lean on my window fixing days when I worked at a college.
I couldn't find my glass cutter, so I used this broken carbide endmill. It worked way better!
The trick is to break the glass off around your circle in segments. Score both sides of the glass.
Then go over to your grinding wheel, and with a fine, well balanced wheel, grind it to size and shape. It takes some patients because if you get the glass too hot, the edge that you are grinding will kind of explode from the temperature differential.
This is just window glass.
