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G-clamp general purpose

by Wired1, published

G-clamp general purpose by Wired1 Sep 8, 2012

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Summary

What we call a G-clamp in these parts but some call a C-clamp for some inexplicable reason.
Originally intended as another camera clamp but looks too multipurpose for just that so I have listed it separately with two versions - with and without the utility lug on the side.
It is quite a complex shape for printing but came out cleanly so must have got something right :)

Instructions

The internal screw thread is a pair of M8 nuts inside the clamp chamber with a close-fitting cap glued on to hold them in place. The glue need only hold the cover and is not structural.
The hole in the tip is printed at 7mm so either tap it out to 8mm as I did and screw it onto the end of the bolt or drill it to 8mm and glue the tip on.
The screw knob is held in place with a nut on the underside.
The pictures tell this story better than I just have so follw them and you can't go wrong.

Clamp2 is the version that is just a clamp - no tab.
Clamp3B is the version with the tab for a camera on the side.
Clamp3A is the other bits you need to build either one.

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What size is the bolt ??
awesome thanks
mike

I used an 8mm bolt about 60mm long but it would probably work with a 3/8" one about 2 1/2" long.

It took me a minute to realize why you call it a G-clam rather than a C-clamp.
Unless I'm mistaken, it's called a C-clamp because the body without the clamping screw tends to resemble a C rather than a G.

On the other hand, If you purchase a 6" C-clamp, the packaging calls it a C-clamp, not a G-clamp. At least that's how it's done here in Michigan.

It wouldn't surprise me if there was a patent, trademark or copyright issue some place in the past regarding G or C clamp.

That's the beauty of an international forum like this, it exposes you to all the myriad of regional names we have for the same thing. Here they are called G-clamps for the reason you have surmised, ie they look like the letter G. :)

If you want to get technical however, it's a square or rectangle clamp.

Have you had any issues with strength? I worry about the layers cracking at the 90 degree bends. 

Yes it is bit weak the way it is printing. It would be better lying on it's side to prevent the laminar separation.

Off topic, but how have you found HeeksCAD? Particularly from a stability issue rather than fancy features.

I love it - apart from the stability issues :) You need to save often as it crashes fairly regularly but when it goes it goes great. Does struggle with complex objects so I tend to desing in parts and then combine the bits into a whole. I would like to be able to save libraries of parts too but manage well enough with drawings that just have parts in them to use.

Never heard of .. wait it is on my disk, i am a software katamari. Cant have tried HeeksCAD much if i dont remember it.

ImplicidCAD is a good one too, i like how easily you can round things and it is much more flexible. However currently the .stls it produces are rather big, and slic3r is fussy about it. Thats nothing inherent though, so it is a good one to watch.

(A lot of my designs work on both openscad and ImplicitCAD)

ps Nice!!
&
lt;- two thumbs up

Definitly going to try this.

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