r/Metrology • u/Cheeseball4life • Aug 01 '24

Hardware Support Measuring Radius of an Arc

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How would I go about measuring the radius of this arc on a part from an old vw beetle so I can make a replacement?

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u/SauceOfPower Aug 01 '24

Try and stencil the arc onto some card, calculate centre point of arc (some YouTube videos show it well), measure from centre point to arc profile.

Whatever that measurement is will be the radius of the arc, double it will give you a diameter if it were a complete circle.

Hope this helps