Counting matching models…
One can fit a gauge dial (8mmShaft) in and some 3mm screws and nuts. To get the Screws pointy put it in a Screwdriver and use it as a lathe. The holes inside have a profile that should guarantee that the gauge dial measures reproducible.
Spherometers go for $200USD or so, but the dial indicators only cost $20. I made this to help me get closer to accurate while grinding a telescope mirror. Radius is 25mm. Additional components required: 1 - Mituyoyo Dial Indicator (8mm…
This remix of Georg's spherometer accommodates larger shafts, like the Pittsburgh dial indicator. I've made the inner hole a bit wider, and made the height taller to accommodate the longer shaft and improve balance. All fasteners are M3.…
