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 59 users online :: 4 registered, 0 hidden and 55 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

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

Airsoft Body Fabrication

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
Sponsored 
  • Author
    Message

Airsoft Body Fabrication

Unread postAuthor: mako » Wed Apr 17, 2013 10:23 am

I was recently working on a airsoft bolt action sniper, and ran across a fabrication problem. As you can see, the piston is exactly like those found in commercial airsoft springers. The entire piston cylinder is pulled back, until the piston rod catches on a sear. Then the cylinder is moved back to the barrel. The piston rod is then released, leaping forward and creating a quick, high pressure burst of air which propels the BB. So far so good.

My problem was coming up with a case for the entire assembly.
I had intended to place the 3/4 inch PVC cylinder inside a slightly larger pipe with a slot in the side for the charging handle. Unfortunately, I was unable to find a pipe with an inside diameter of the correct size.

Any idea's on creating a case for this?

I thought of a block of something (steel, aluminum, wood, epoxy) with appropriate sized holes bored through, but I lack the tools to do a really good job of it. The problem is that the nozzle has to end up in a very specific place each time, and any variation could cause rapid wear.
  • 0

Attachments
piston.jpg
piston.jpg (15.69 KiB) Viewed 1702 times
User avatar
mako
Master Sergeant
Master Sergeant
 
Posts: 163
Joined: Sun Apr 14, 2013 10:43 pm
Reputation: 2

Unread postAuthor: jrrdw » Wed Apr 17, 2013 10:47 am

These plus this and some of this you should be able to get it done.
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6540
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: mako » Wed Apr 17, 2013 10:52 am

:D
Yeah, I'd thought of that. I'd use oak, or something harder, but I didn't know if the wood would stand up to that kind of wear. Also, I have a drill press (old but in good shape). The biggest problem is getting the holes to go exactly straight. :(
  • 0

User avatar
mako
Master Sergeant
Master Sergeant
 
Posts: 163
Joined: Sun Apr 14, 2013 10:43 pm
Reputation: 2

Unread postAuthor: jrrdw » Wed Apr 17, 2013 11:28 am

Use a 3/4" steel washer for a stop to prevent wear. Do you have a vise on your drill press? A tilt table? A combination square? If you have those tools you should have no problem drilling any angles or straight holes. I have that exact set of spade bits, for cheep-os they are surprisingly good.
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6540
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: mako » Wed Apr 17, 2013 11:32 am

The wear problem would be on the hop-up chamber nozzle, but if the hole is exact its not a problem. And no, there's no built in vise on the drill press or a square, but I guess I could fabricate a jig for that. And spade bits aren't too hard to lay hands on. :lol:
  • 0

User avatar
mako
Master Sergeant
Master Sergeant
 
Posts: 163
Joined: Sun Apr 14, 2013 10:43 pm
Reputation: 2

Unread postAuthor: jrrdw » Wed Apr 17, 2013 12:02 pm

jrrdw wrote:Use a 3/4" steel washer for a stop to prevent wear. Do you have a vise on your drill press? A tilt table? A combination square? If you have those tools you should have no problem drilling any angles or straight holes. I have that exact set of spade bits, for cheep-os they are surprisingly good.


Well I worded that wrong. Do you have a vise for your drill press? And a combination square?

Vise: http://www.harborfreight.com/4-inch-jaw-capacity-drill-press-vise-30999.html

Combination square: http://www.harborfreight.com/12-inch-combination-square-set-92471.html

or

http://www.harborfreight.com/6-heavy-duty-combination-suare-69362.html
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6540
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: mako » Wed Apr 17, 2013 12:04 pm

Hey, thanks, man. 8) I didn't realize they made those.
I could use that. Have you ever used a drill press on aluminum block?
  • 0

User avatar
mako
Master Sergeant
Master Sergeant
 
Posts: 163
Joined: Sun Apr 14, 2013 10:43 pm
Reputation: 2

Sponsored

Sponsor
 


Unread postAuthor: jrrdw » Wed Apr 17, 2013 12:23 pm

I used my drill press to drill the equalizer holes on this piston I made for another SF member. I tilted the table with the vise I showed you. Bolted my vise to the table, tilted to about 45 degrees and drilled 3 holes in it.

  • 0

Last edited by jrrdw on Wed Oct 30, 2013 4:45 pm, edited 1 time in total.
Reason: Fixed video.
When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6540
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: mako » Wed Apr 17, 2013 12:25 pm

Nice piece of work, mate! I'm impressed. I guess maybe I'm not as limited by the tools as I thought I was.
  • 0

User avatar
mako
Master Sergeant
Master Sergeant
 
Posts: 163
Joined: Sun Apr 14, 2013 10:43 pm
Reputation: 2

Unread postAuthor: jrrdw » Wed Apr 17, 2013 12:45 pm

You can do a lot with a drill press. If my camera hadn't broke I was going to get a video of me drilling the EQ holes but I wanted you to see the aluminum piston so you know you you can use what you have. I hope it helps.
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6540
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: Crna Legija » Thu Apr 18, 2013 4:00 am

were you from? if you can't do it, put a post in here and maybe someone can help you!
  • 0

'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson

Add me on ps3: wannafuk, 8/11/11 cant wait
User avatar
Crna Legija
Major General
Major General
 
Posts: 2333
Joined: Sun Jul 20, 2008 5:14 am
Location: australia
Reputation: 0

Unread postAuthor: Zeus » Thu Apr 18, 2013 4:33 am

Crna, if we're taking bets, I'll guess New Zealand, airsoft, but using mate :wink:

If you're within a fair shipping distance of Aus, I'll gladly run something up when this lathe comes in
  • 0

/sarcasm, /hyperbole
User avatar
Zeus
Major General
Major General
 
Posts: 1422
Joined: Tue Oct 27, 2009 7:34 pm
Location: 'Straya, C*nt
Reputation: 2

Unread postAuthor: Crna Legija » Thu Apr 18, 2013 7:10 am

yeah that why asked though he might be aussie, hahah if you are draw what you need and ill see what i can do!
  • 0

'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson

Add me on ps3: wannafuk, 8/11/11 cant wait
User avatar
Crna Legija
Major General
Major General
 
Posts: 2333
Joined: Sun Jul 20, 2008 5:14 am
Location: australia
Reputation: 0

Unread postAuthor: mako » Thu Apr 18, 2013 1:03 pm

Sorry, guys, not Aussie. Good old Lone Star State. I can't stand the standard use of the word "Dude", so I use "mate". @Crna Legija, I can make the stuff myself, but I wanted to know if there was an easier way to go about it.
  • 0

User avatar
mako
Master Sergeant
Master Sergeant
 
Posts: 163
Joined: Sun Apr 14, 2013 10:43 pm
Reputation: 2

Unread postAuthor: cammyd32 » Thu Apr 18, 2013 3:56 pm

You could cast a casing using casting resin, I think Jsr recently posted quite a good link about casting resin somewhere, I'll see if I can find it...
You could put your pipe inside a polystyrene mold and fill it to the top with high strength resin wait till it cures and remove the mold, then hey presto, you have a solid completed housing encasing your spring-plunger setup, no complicated drilling required, and if you cure it right, it's clear, so you can look inside to see your mechanism working
  • 0

User avatar
cammyd32
Captain
Captain
 
Posts: 326
Joined: Fri Apr 29, 2011 7:00 am
Country: United Kingdom (uk)
Reputation: 8

Next

Return to BB/Airsoft/Pellet Gun Discussion

Who is online

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

Reputation System ©'