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Hand-Screw Clamp

by jakejake, published

Hand-Screw Clamp by jakejake Jun 25, 2017

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Summary

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This is a proof of concept of a new thread design which can make a hand-screw type clamp, commonly used in woodworking. It won't match the strength of an actual clamp, but I tried to make a clamp that was as strong as possible, with 100% 3d printed parts. For this, careful consideration needed to be made so that each part respects the grain of the 3d print. It is, however, still a 3d printed plastic clamp, so don't get too crazy with it!

Print Settings:

I printed everything with standard draft settings, in PLA. Through testing, I found that the small "SlideHinge" parts are always the first things to fail. They break off at the very tip of the end that captures the rotating knob. So if you wanted it stronger with minimal changes, you could print the "SlideHinge" part solid.

caution

This is tricky to assemble. The design intention wasn't to make a simple clamp. It is more of a demonstration of a 3d printed mechanism to make this special type of clamp.

Also, adding some sort of wax from a candle / soap / etc. will help make clamping much smoother.





Assembly video:
https://youtu.be/MIiluSksuhI

Watch this thing crushing stuff:
https://youtu.be/ECYQ5PWOezY

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Love the clamp, but did you also know you can use the same parts and assemble it the other way around and use it a a spreader.

This is a very nice design! I also like your love for details and how you present your designs, especially the exploded views. Would you like share with us how you did them ;-)

Having dabbled in woodworking these clamps could be very useful. I see these as a way to construct a unique clamp for each situation. very good design and shows instinctive talent for design. Very good
Grampa

thanks for sharing

This is amazing jakejake. Thanks for sharing.

Thanks guys, I hope it works well for you. Might release alternate "pad" designs in the future for special tasks depending on how useful it actually is.

Great designs, thanks!

Good job man I've printed several of your things now and they all work great. Keep up the great work.

Jun 26, 2017 - Modified Jun 26, 2017

quite impressive!!
what material did you use? ABS?

wouldn't the clamps become much stronger, if you'd change the orientation of the "jaw"-files?
sure, you will need supports, but the holes will withstand much greater forces!!

thank you! It is PLA

After some early prototypes, I kept them in the orientation shown, so I must admit I haven't tried the final design in that orientation. Maybe I will try that.

The shells layered in this orientation gives the side walls a structural rib function which prevents tear-out around the holes so the holes themselves don't need to be strong. If you zoom in there is actually a tiny gap in the center of the rib, doubling the shells in that area. But I'm not sure what the effect of layer gaps in a print would have on this.

4 days ago - Modified 4 days ago
bigibomb - in reply to jakejake

printing the jaws up and down would make them weaker because of the smaller layers

What filaments are you using? I really like the matte red and matte white.

I use matter hackers pro pla for just about everything. I like the colors and I never have any issues printing with it, so I use it exclusively (I have no affiliation with them).

Oh, I've heard good things about them. Thanks!

Another awesome design, thanks for sharing!

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