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 51 users online :: 4 registered, 0 hidden and 47 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

The Offcial Machinist Thread: Revised 01/04/2014

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

Unread postAuthor: CS » Sun Jul 21, 2013 5:35 pm

Image

Notice the angle of tool in roughing versus finishing. It really makes a difference with metal.

If you ever try boring a PVC pipe for an o-ring fit, smooth the inside with sandpaper when your finished.

:wink:
  • 0

User avatar
CS
Donating Moderator
Donating Moderator
 
Posts: 1897
Joined: Fri Feb 18, 2005 5:32 pm
Location: Southern Utah
Country: United States (us)
Reputation: 4

Unread postAuthor: jackssmirkingrevenge » Sun Jul 21, 2013 9:31 pm

I suggest you make Dimply.

It's a great way to cover all basic operations and you get a nice pen gun at the end of the day :)
  • 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: wyz2285 » Mon Jul 22, 2013 2:32 am

jackssmirkingrevenge wrote:I suggest you make Dimply.

It's a great way to cover all basic operations and you get a nice pen gun at the end of the day :)

Exactly my thought, but right now I lack some small diameter stock. Turning down these big bars down would cust a lot of time and kind of wasting.
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: jackssmirkingrevenge » Tue Jul 23, 2013 12:53 pm

Damn, you didn't need a lathe after all...

[youtube]http://www.youtube.com/watch?v=1EUDA9wCGwo[/youtube]
  • 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: wyz2285 » Tue Jul 23, 2013 4:01 pm

well, first good luck finding the right sized tube and washers; second, be confident (or brave) enough to drill holes on a fine piece of art :lol:
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: wyz2285 » Sat Jul 27, 2013 12:56 pm

I bought a indexable boring bar and respective carbide inserts.
Can it also be used for outside turning? As my understanding the only difference between the boring and turning bar it's the boring one has a round body instead of square. They are not cheap at all so I really hope it will work for both.
Will carbide inserts for cutting steel work for aluminium and brass? I see there are both types for ferrous and non-ferrous...
Also, witch type of dovetail milling cutter should I use to cut grooves for scope mount? These rails used on airguns I mean.
Thanks
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: Blitz » Sat Jul 27, 2013 1:47 pm

Not sure which cutter you ought to use, but for what it's worth, the dovetail mounts on airguns are the same you'd find on firearms that have 'em (like 22's). My problem with them is that they are often cut poorly and are inconsistent. :(. I had the mount on one of my Marlin 795's adjusted because of that. I'll ask a gunsmith buddy of mine what he uses.
  • 0

User avatar
Blitz
Colonel
Colonel
 
Posts: 621
Joined: Sat Apr 07, 2007 1:48 am
Location: West Chicago, IL
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: wyz2285 » Sat Jul 27, 2013 2:07 pm

First I'd like to know the angle, 45º or 60º, then the range of cutting diameter(my mill only take 10mm shank cutters, so 12mm-16mm cutting diameter)
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: Blitz » Sat Jul 27, 2013 2:09 pm

Duly noted - I'll let ya know.
  • 0

User avatar
Blitz
Colonel
Colonel
 
Posts: 621
Joined: Sat Apr 07, 2007 1:48 am
Location: West Chicago, IL
Reputation: 0

Unread postAuthor: wyz2285 » Sat Jul 27, 2013 2:18 pm

Thanks :)
Message too short, so another question:
How exactly does a gas blow-back airsoft gun works? I didn't find anything about them :?
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: Blitz » Sat Jul 27, 2013 2:24 pm

Semi auto, right?

If so... Probably the same way a gas blowback firearm works (most semi-auto .22LR guns). Was going to post a link to that, but for some reason on my phone I can't get to most sites but here!
  • 0

User avatar
Blitz
Colonel
Colonel
 
Posts: 621
Joined: Sat Apr 07, 2007 1:48 am
Location: West Chicago, IL
Reputation: 0

Unread postAuthor: wyz2285 » Sat Jul 27, 2013 2:31 pm

Also full auto... I found some gas rifles actually delivers quite a bit of power so I'm curious about the mechanism, I mean I don't believe the gas used to fire the bb is strong enough to operate a hammer and bolt
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: Blitz » Sat Jul 27, 2013 2:39 pm

Ah, understood. BTW, Dovetail is 60 degrees, Picatinny rails are 45 degrees. My friend added that not all dovetail rails are equal; some are 11mm or other metric sizes, most common are 3/8" though, and those are 60 degrees.
  • 0

User avatar
Blitz
Colonel
Colonel
 
Posts: 621
Joined: Sat Apr 07, 2007 1:48 am
Location: West Chicago, IL
Reputation: 0

Unread postAuthor: wyz2285 » Sat Jul 27, 2013 5:03 pm

Thanks.
Got bored so I decided to make a mono core internal for my M4's suppressor.
Everything went smooth, also it's much better than the spring+sponge internal as the original :D I'm very proud of it :D
  • 0

Attachments
CameraZOOM-20130727224447065.jpg
As you can see the current mono core and the original spring+sponge setup
CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: Blitz » Sat Jul 27, 2013 5:09 pm

Awesome! I can't legally have a suppressor here. My AR will continue to be loud. Well, when I can afford my new upper for it. :lol:
  • 0

User avatar
Blitz
Colonel
Colonel
 
Posts: 621
Joined: Sat Apr 07, 2007 1:48 am
Location: West Chicago, IL
Reputation: 0

PreviousNext

Return to General Spud Cannon Related

Who is online

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

Reputation System ©'