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Fastener (Replacement for Chicago Screw)

by NewtonRob, published

Fastener (Replacement for Chicago Screw) by NewtonRob Mar 8, 2014
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This is a fastener design that can be used to replace Chicago Screws. Of course it is not as strong, but should work for testing. I designed it to be used with a prototype of a Cyborg Beast.

Each piece is printed in half. This should make it a higher quality. I don't think you need to glue the halfs together. Just slide them in (on both sides). Add a dab of glue on the solid core where it meets the head of the sleeved part.

Parametric. It is easy to change the size.

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Thanks, that's very convenient! I've nearly finished to assemble a Cyborg Beast hand thanks to this. However I just use the female part, I was not patient enough to tune it well for the male parts to fit in :)
What "play" value did you use? I've printed them vertically, whole pieces, not halves, this may explain why i have some deformation though.

I used .2 for play. The reason I print the on the plate is that printing ling strings is stronger than printing layers. If yo pint the up and down, than every layer is a possible breaking point. They were a very tight fit. I used a drill bit down the female part to make sure there was enough room. I designed it in half's because I wanted to print the flat for strength.

When printing verically, 0.2 for play was not enough. Printing thin columns is always http://tricky.ittricky.it would have probably worked laying on the bed.
I understand your point to print it like this, I took printing orientation in consideration when printing the fingers and phalanges. Now, this hand is not for someone (at least not for now) so it will do. If neccesary I will reprint like you did.
Thanks for the answer!