6" Spherometer
Description
This is a 6" diameter Spherometer I am using to grind a 9.25" mirror. Each leg from point to point of the ball set screws is 131.98mm. To make one you will need: (1) Printed Spherometer body. (3) M6 ball tipped set screws, 16mm long. https://www.mcmaster.com/93339A211/ (1) Economy .001" resolution dial indicator. https://www.mcmaster.com/20715A74/ (1) Any M4 screw to secure dial indicator in position.
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