Universal Ball Mount System

by Agger Jan 22, 2016
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I want to make a version with the peg attached to the ball... but I am having trouble editing the STL file in SHAPR.... Do you have a version with the peg attached to the ball?

What size peg do you want?

I found that the threads jammed so I increased the size of the cap by 2% and it threads perfectly.

How is the 1/4 rod being secured? I can see the hex hole, but what stops the whole thing sliding out?

Use a dab of 5 min epoxy.

Ball can be print with support without flipping. So the upper part which is always in sight will be better in quality.

Very nicely done.

Do you realize that the cap is not flat on the XY plane? I had to import it into openscad, rotate a bit around the Y axis, and then subtract a tiny bit off of the bottom in order to make it flat. Still, it turned out very nice

So.... I did have some trouble in makerware with this part. I needed to rotate 1 degree clockwise. I thought I addressed that, but I guess not! I replaced the cap with one I believe is level now.

Thanks for the catch!

I like your idea, so I added a double socket to make and "elbow". (see new pictures.) I think this ought to hold a pound or two. I find that as the sockets get worked in and smooth up, they lose friction, so at some point a scrap of paper mad need to be put behind the ball to add friction. I mocked up a "helping hand like you suggested, and it holding a 2.5 pound piece of cold-rolled steel.

I love it.
2.5 pounds should be fine for most applications.
As to the slipping from wear, I intended on swiping some silicone caulk on the inside of the cap and base. Just a thin layer, when cured, should offer all the friction the ball would need.

This is great! I've been needing a lockable ball joint for a small helping hand device. What sort of holding power does it have?

you could try to modify surface roughness to get the required "holding power." there are a lot of consideration that would control this including material, geometry, surface finish, etc... i would experiment if i was you.