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Question on attaching the round to the square.....

I need to attach a tube (it is fairly rigid, like a bic pen body), to a box (coming out of the smaller end of the box) and it needs to be fairly secure as there will be wires running through it and a "pickup coil" attached to the end of the device. The box may be plastic, or it may be metal, I haven't decided yet. I had thought about threading the barrel of the tube and just using two nuts to lock it in. Any other ideas would be greatly appreciated.

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either direct weld it or cut/drill a hole and epoxy if it isn't under load...
Goodhart (author)  killerjackalope9 years ago
The coil weighs a few onces, and on the end of a pen sized tube (or rather the empty tube from a pen :-) it does needs some bracing. I was just looking for ideas that may accomplish that best. I have been offered a few that may work.
The epoxy would probably do if you give an extra inch and mound it...
Goodhart (author)  killerjackalope9 years ago
That, and / or the same principle on the inside of the box.
Oh sorry i meant on the inside, the combination of support and adhesion should brace pretty well, there's some stuff I bought that I used for making simple parts with, it was a resin + resin stuff that made a nice moldable plastic not an epoxy but works the same.
Goodhart (author)  killerjackalope9 years ago
Tis ok. I have seen several of those kind of epoxies, etc. It may be awhile before I can obtain them :-)
Pbyrd9 years ago
Is this a coilgun?
Goodhart (author)  Pbyrd9 years ago
No, once I get my workbench cleared of my wife's junk, I will be making an ELF detector (Extremely Low Frequency detector). The "coil", which is the pickup coil, will be at the end of a tube protruding from the box. Much like a miniature Metal detector. The first one I made, I didn't make it to look pretty, just functional....and the electrical tape is not starting to peel off :-) so I want this one to be more "presentable" as well as durable.
Patrik9 years ago
Sick your tube an extra inch or two into the box, and figure out some way to fix the end of it to thebox as well. That way it's supported in two places along the end of the tube, and less likely to budge. If you have any choice in where to connect the tube to the box, put it all the way in a corner, and let it run along the corner for an inch or so - plenty of space to glue, tie or screw it in place solidly.
Goodhart (author)  Patrik9 years ago
Sounds like an idea, I will think about this too, as I search for an "available" (to most) box for this project. Thanks.
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