Yttrium2
Perpetual Question Machine
Posts: 1104
Registered: 7-2-2015
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How to measure the inner diameter of a circle?
I tried measuring the inner diameter of a bottle with a dollar store measuring tape in mm.
My measurements varied because I couldn't line the tape up perfectly centered.
Is there a caliper for this?
How does one use it?
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Twospoons
International Hazard
Posts: 1324
Registered: 26-7-2004
Location: Middle Earth
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Mood: A trace of hope...
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You want a vernier caliper. They range from cheap and cheerful plastic ones for a few bucks to expensive stainless steel ones with digital readouts.
https://www.technologystudent.com/equip1/caliper1a.png
Helicopter: "helico" -> spiral, "pter" -> with wings
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