What we need to do is estimate the circle that the inside curve of the bend makes. So, with a few principles, we can get a close approximation of the bend radius even from the photograph. Pictured here, is our result and the radius of 9″ is quite different! The customer was not careful to measure the true arc of the bend, and thus, estimated a much larger circle. Your gut feeling is that if you replace this with a 24″ radius bend, your customer will not be happy about the result. They can’t ship you the old bend because they are still using it. Imagine if you got a picture like this in your email and your customer said, “make us one just like this.” On top of that, they insist that this is a bend on a 24″ radius. How to identify the radius of a bend for a bend less than 180 Degrees.
