Cheeseborough Clamps - norpchen/BracketsAndMounts GitHub Wiki

These are pipe clamps, commonly used for scaffolding, trusses and lighting rigs. In pairs, they hold two pipes together with a pivot. Used singly they can be used to clamp other things to a pipe (lights, etc).

These are sized for 1/2" steel pipe and 1/4"-20 bolts. A 1/4"-20 carriage bolt and wing nut tighten the clamp around the pipe, and a short 1/4"-20 bolt / nut is used to fasten them together / to other things. I use them to fashion quick temporary jigs and frames from pipes.

The pivot is not a bearing. It's just some flexibility when setting up the position and not meant to be spun around. The nut and bolt will unscrew and it will come apart!

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WARNING! There are so many variables when printing that their strength cannot be guaranteed. Therefore, consider these LIGHT DUTY -- and not replacements for steel clamps. They are not strong enough to trust anyone's life to! Don't use these to clamp a 200 lb spotlight over someone's head! Use at your own risk.

Instructions

Print with good layer bonding and sufficient loops & infill for strength. ABS, HIPS, or Nylon are probably better because they are more flexible... PLA will work but tends to split or crack.

Stick a short 1/4"-20 bolt through the hole in the flat end. Make sure the head of the bolt does not intrude into the pipe's area. Stick a matching nut in a second clamp and put them together (add a washer or two as needed to smooth pivoting and adjust length)

Stick a 1/4"-20 carriage bolt through the clamp jaws, into the side with the square hole. Put a wing-nut on the other end. Slide over the end of a 1/2" steel pipe and tighten the wing-nut to clamp.