Ideas for filling some gaps (other than just more epoxy?)

[Zyzzyva1000]

Trying my hand at 3d printing, and made a fin can and nose cone for a BT 60 tube I had sitting around. The fin can is just slightly too big for the body tube. I know I could just make a thick layer of epoxy, but I was looking into other ideas? A few strips of masking tape gave a snug fit, but I don't think the epoxy will stick. Any ideas for something I could wrap that epoxy would stick to?

Otherwise my plan was just to thicken the epoxy with some cabosil (but less than I use for my usual fillets)

 

[OverTheTop]

Perhaps epoxy a strip of paper around the BT. The epoxy will load through the paper. You could possibly even try cyanoacrylate glue (in a well-ventilated area), but I'm not sure if epoxy sticks to that.

You could even epoxy the paper and the fincan in one go.

 

[rharshberger]

Trying my hand at 3d printing, and made a fin can and nose cone for a BT 60 tube I had sitting around. The fin can is just slightly too big for the body tube. I know I could just make a thick layer of epoxy, but I was looking into other ideas? A few strips of masking tape gave a snug fit, but I don't think the epoxy will stick. Any ideas for something I could wrap that epoxy would stick to?

Otherwise my plan was just to thicken the epoxy with some cabosil (but less than I use for my usual fillets)

You didn't tell us what the 3D printed component is printed from (PLA,PETG,ABS, Nylon, etc) that makes a significant difference.

 

[jnmiller]

Try printing it again but scaling it down by 1 or 2 percent

 

[David Schwantz]

1/64th ply wraps very nicely.

 

[jqavins]

I'm with OverTheTop on using paper, assuming this is LP. (It's BT-60, so that's my assumption.) My thought was a wrap or two or five of printer paper with wood glue, but doing the paper and the fin can all in one go with one batch of epoxy sounds like a good idea too.

No, that's a lie, that wasn't my first thought. My first thought was to use a tube sleeve. If you don't have or want to buy a sleeve, just cut a slit up the side of another piece of BT-60 and slide that over. That will leave a little gap, which you can fill with something like CWF, probably not thinned this time. Or not even bother to fill. If the sleeve is recessed a bit from both ends of the fin can then the gap won't show, and it's structurally irrelevant.

But then I thought that might be too thick, so I went to printer paper.

 

[Zyzzyva1000]

Appreciate all the replies. I just wood glued on some printer paper and then epoxied over it once dry. Then for my second try I printed at 99% scale it it was almost perfect. Maybe 98.5% next time and I'll be set. As others have said this is just for LP messing around so should be plenty strong. Thanks again!