Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 60 users online :: 4 registered, 0 hidden and 56 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Converting torch head to threaded fitting

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
Sponsored 
  • Author
    Message

Re: Converting torch head to threaded fitting

Unread postAuthor: jackssmirkingrevenge » Thu Nov 28, 2013 8:24 am

Biopyro wrote:Yeah I might tap the inside to a female thread but I don't know if there is enough material to do 1/8"


1/8" BSP maximum diameter is 9.7mm, that leaves you a minimum wall thickness of 0.7mm. I'd be ok with that.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Re: Converting torch head to threaded fitting

Unread postAuthor: Ragnarok » Thu Nov 28, 2013 11:30 am

Eh.... 0.7mm at the base of a thread (basically, the start of a crack, with a fitting putting force on it)? Not brilliant in my book.

My call would be something similar to what PeteS said. One of my favourite tricks is to basically create bushings by cutting slices out of the circumference of a pipe and then inserting it inside the pipe's normal diameter.
I mostly use it to go between 22mm and 28mm pipe sizes when a normal reducer won't do for the purpose - one ring like that neatly plugs the difference between the inside diameter of a 28mm pipe and the outside diameter of a 22mm fitting.

For example, this is presently* what the end of the v2 HEAL valve looks like (complete with my crappy handwriting):
CIMG0237-800.jpg

It might be a little difficult to see the boundaries between each pipe, but the solder gaps are all just about visible if you expand the image.
*Eventually, it'll have a modified 22mm pipe inserted into the slip coupling, which will contour down from the 22mm coupling, which acts as the sealing face, to the 20.3mm barrel.

If you've got any spare 15mm pipe around, it might be worth seeing if such a "bushing" could be used to solder between 15mm pipe and the head. It'd be easy enough to cut and check the fit.

... actually, it occurs to me that I think I do have some 15mm pipe that I've cut to fit inside its own diameter. I'll see if I can find where it is and measure the ID of that.
  • 0

Does that thing kinda look like a big cat to you?
User avatar
Ragnarok
Chief of Staff
Chief of Staff
 
Posts: 5339
Joined: Tue Dec 19, 2006 8:23 am
Location: The UK
Reputation: 8

Previous

Return to Combustion Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'