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 70 users online :: 3 registered, 0 hidden and 67 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Custom Machined Parts, Where do I start?

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

Custom Machined Parts, Where do I start?

Unread postAuthor: Wali » Sun Sep 12, 2010 4:14 pm

As I've gained experience in my various design hobbies, I have found that I frequently need custom made parts that are Very difficult to make without expensive machines. Does anyone here have experience with this kind of thing? I have seen the online shops where you just send in your design and they make whatever you want. I can't figure out how much this would be(probably not worth it). Are there any alternatives to make parts? My university has a nice shop but I cant get access for another couple years :x . Any input would be appreciated.
  • 0


Wali
Private
Private
 
Posts: 5
Joined: Tue Jul 13, 2010 6:39 pm
Reputation: 0

Unread postAuthor: Heimo » Sun Sep 12, 2010 4:25 pm

you can always support a local machine shop, try a small one they would be the most willing to try and help you
  • 0

The voices in my head may not be real, but they have some good ideas!
User avatar
Heimo
2nd Lieutenant
2nd Lieutenant
 
Posts: 242
Joined: Sun Oct 25, 2009 3:02 pm
Reputation: 0

Unread postAuthor: D_Hall » Sun Sep 12, 2010 5:28 pm

emachineshop.com
  • 0

Simulation geek (GGDT / HGDT) and designer of Vera.
User avatar
D_Hall
Donating Member
Donating Member
 
Posts: 1759
Joined: Thu Feb 07, 2008 7:37 pm
Location: SoCal
Reputation: 6

Re: Custom Machined Parts, Where do I start?

Unread postAuthor: jackssmirkingrevenge » Sun Sep 12, 2010 6:51 pm

Wali wrote:Are there any alternatives to make parts?


You could master the art of high strength binary adhesives...
  • 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

Unread postAuthor: Wali » Sun Sep 12, 2010 8:59 pm

Based on prices I've seen so far and that emachineshop site, getting things machined won't be an option till I can use my school's shop. Is there any data on the strength and properties of the epoxy pistons and such? That looks like the next best thing for now.
  • 0


Wali
Private
Private
 
Posts: 5
Joined: Tue Jul 13, 2010 6:39 pm
Reputation: 0

Unread postAuthor: cfb_rolley » Sun Sep 12, 2010 10:34 pm

If you have experience in autocad or another design program, you can design what you want and save it as a .igs file and email it off to a cnc company. I use autocad then import it into rhino 3d and save it as a .igs because I'm fluent with acad, but it doesn't save as .igs. The company I use is called rpworld.net and they have done alot of cnc bike parts for me, and the cost isn't too bad. I had a couple of clear polycarbonate crank spacers made for about $50 us, and they take paypal if you don't have a credit card.
  • 0

User avatar
cfb_rolley
Master Sergeant
Master Sergeant
 
Posts: 166
Joined: Tue Mar 24, 2009 11:11 pm
Reputation: 5

Unread postAuthor: jackssmirkingrevenge » Sun Sep 12, 2010 11:52 pm

Wali wrote:Is there any data on the strength and properties of the epoxy pistons and such? That looks like the next best thing for now.


In pneumatics, I've been using epoxy pistons and construction up to 800 psi successfully for years now, like for example here. I do however get the occasional failure, but it's all down to using the material correctly.

Take for example my recent hybrid experimentation:

Fail at 8x

Win at 14x and counting


The two launchers are practically identical, except for chamber material. The one which failed had a thin alloy chamber, which could expand isgnificantly under pressure and allowed the epoxy to pop out. My second attempt on the other hand has a significantly thicker walled chamber made of stainless steel, which doesn't expand so much allowing the epoxy to grip better.
  • 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

Sponsored

Sponsor
 


Unread postAuthor: i-will » Mon Sep 13, 2010 4:47 pm

I wanted to save this for when I posted my finished project. This will probably piss off a lot of veteran spuders to head anyone say this. I've made a good number of custom pneumatic and mechanical parts and valves out of small hobby tubes rapped with a tight PAPER body coated with SUPER GLUE and a final thin layer of all purpose epoxy. I heard it called the hard paper method. It fininishes rock hard, air tight and weather proof. I also lubricate them the same ass all my other parts. It sounds pretty crazy but it works.
  • 0

WHY PAY FOR IT WHEN U CAN MAKE IT?
User avatar
i-will
2nd Lieutenant
2nd Lieutenant
 
Posts: 245
Joined: Tue Jul 22, 2008 3:04 am
Reputation: 0

Unread postAuthor: Technician1002 » Mon Sep 13, 2010 5:21 pm

If the part is a relatively simple piston, it could be turned on a drill press. See my Mouse Musket thread in my sig for details.
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: POLAND_SPUD » Mon Sep 13, 2010 6:59 pm

Fail at 8x

Win at 14x and counting



just make sure it won't be final countdown :wink:
[youtube]http://www.youtube.com/watch?v=9jK-NcRmVcw[/youtube]

@wali
you can always contact some machine shop located in eastern europe, for example in poland... :D
AFAIK machining is relatively cheap here... sure you'd have to pay for shipping but if it is really complex they you might save a lot
  • 0

Last edited by POLAND_SPUD on Mon Sep 13, 2010 8:45 pm, edited 1 time in total.
Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: ramses » Mon Sep 13, 2010 8:30 pm

Where are you located? If you're in the US, and it's just simple-ish lathe work with loose-ish tolerances (I can do +-.001, but it takes too long), send me PDF's, DXF's, or scanned technical drawings and I'll look into doing it for shipping, plus a nominal fee (material and such).

I don't like single point threading, boring (much), cams, knurling, metric threads (though I do need to get a metric tap and die set), etc, but basic stuff is fine.


OH, and I pretty much refuse to make anything out of copper. That is a FLAMING PITA.
  • 0

POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name :D
User avatar
ramses
Major General
Major General
 
Posts: 1679
Joined: Thu May 29, 2008 6:50 pm
Reputation: 3

Unread postAuthor: jackssmirkingrevenge » Tue Sep 14, 2010 12:31 am

POLAND_SPUD wrote:just make sure it won't be final countdown :wink:


That pun was bad enough without the video link!

:D :D :D

Actually I could have put it in GLaDOS quotes, she really does have something for every spudding situation :)


Frankly, this chamber was a mistake

This was a triumph


you can always contact some machine shop located in eastern europe, for example in Poland... :D
AFAIK machining is relatively cheap here... sure you'd have to pay for shipping but if it is really complex they you might save a lot


Do you have a warehouse full of lathes with malnourished orphans chained to them ;D
  • 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

Unread postAuthor: POLAND_SPUD » Tue Sep 14, 2010 5:12 am

Do you have a warehouse full of lathes with malnourished orphans chained to them

:idea:

......not yet

Kuba T1000 has ordered a machined vortex block. IIRC it was quite cheap so I'd say it's a viable option
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: Gun Freak » Tue Sep 14, 2010 8:43 pm

Yeah I'd like to know where that dude got that vortex block, it was bad ass.
  • 0

OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Unread postAuthor: janet986w » Wed Sep 15, 2010 7:34 pm

POLAND_SPUD wrote:
Fail at 8x

Win at 14x and counting



just make sure it won't be final countdown :wink:
[youtube]http://www.youtube.com/watch?v=9jK-NcRmVcw[/youtube]

@wali
you can always contact some machine shop located in eastern europe, for example in poland... :D
AFAIK machining is relatively cheap here... sure you'd have to pay for shipping but if it is really complex they you might save a lot



Such a very amazing video!
Thanks you for the post.


__________________
Watch Devil Online Free
  • 0


janet986w
Private
Private
 
Posts: 1
Joined: Wed Sep 15, 2010 3:30 am
Reputation: 0

Return to General Spud Cannon Related

Who is online

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

Reputation System ©'