Meaningful discussion outside of the potato gun realm. Projects, theories, current events. Non-productive discussion will be locked.
-
iknowmy3tables
- Staff Sergeant


- Posts: 1596
- Joined: Fri Dec 15, 2006 3:57 pm
- Location: maryland
- Has thanked: 3 times
- Been thanked: 9 times
Wed Jan 30, 2008 9:31 pm
I'm now part of the school robotics team

.
Not nearly as great as spudgun building
anyways I was trying to mount a air cylinder on a special swivel ball and socket thingy but the threads on the cylinder are weird they are like almost like a common bolt type in the tap kit but like 1/16" off in size, I can't use a dye on the cylinder's threads because they might want to reuse it and with the same fittings.
so right now the cylinder's threads are held in a butchered socket of the swivel joint, I was wondering if i could try casing the threads with epoxy by first coating the cylinder threads with petroleum jelly or oil the pushing them into the socket with epoxy in it
-
Hawkeye
- Specialist 4

- Posts: 462
- Joined: Sun Jan 21, 2007 7:12 pm
Wed Jan 30, 2008 9:55 pm
It would probably be a better idea to use something like "thread repair compound" although even that might not be up to the tolerances you are looking for.
I would be a bit nervous that epoxy would be permanent unless you were very careful with greasing the threads very evenly and thoroughly.
-
Hotwired
- First Sergeant 3

- Posts: 2599
- Joined: Fri Oct 13, 2006 5:51 am
- Location: UK
Wed Jan 30, 2008 10:15 pm
Polymorph
Squidge some of that about the threads and when cooled and hardened it's pretty much like solid nylon. So it could easily be removed afterwards.
Absolutely a terrible idea however if there are any common thermoplastics that will come in contact with it while it's soft. It sticks to those like tar.
-
Eddbot
- Specialist 4

- Posts: 434
- Joined: Tue Oct 09, 2007 6:08 pm
Thu Jan 31, 2008 2:25 am
Hotwired wrote:Polymorph
Squidge some of that about the threads and when cooled and hardened it's pretty much like solid nylon. So it could easily be removed afterwards.
Absolutely a terrible idea however if there are any common thermoplastics that will come in contact with it while it's soft. It sticks to those like tar.
for some reason that made me laugh really hard, but i do agree with what you said, it just made me laugh and i don't know why
:edfirst:
-
jackssmirkingrevenge
- Five Star General

- Posts: 26216
- Joined: Thu Mar 15, 2007 11:28 pm
- Has thanked: 576 times
- Been thanked: 347 times
Thu Jan 31, 2008 2:36 am
I've done this before to make the silencer for my CO2 AK, make sure all the contact areas are greased well, but not too much or the thread cast won't be deep enough:
-
Attachments
-

-

hectmarr wrote:You have to make many weapons, because this field is long and short life
-
Matheusilla
- Specialist

- Posts: 140
- Joined: Tue Feb 13, 2007 7:43 pm
Fri Feb 01, 2008 9:21 pm
You could also just polish the threads to be epoxied, it will give a tighter fit but still come apart. Basically, in my experiences, epoxy can be removed from almost all "fine" surfaces with a little scraping,as long as the surfaces are of a non-porous, metallic nature
