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Springs

Posted: Sun Jan 17, 2010 5:29 am
by frozebyte
Hello all,

I just wanted to know where i can find those high tension steel springs. Its going to be VERY hard to find in stores here, so i was wondering if anyone could give me a heads up on where i can salvage some, or a tip on what kind of stores i can find them in.

The spring would be used in a spring-piston air pistol :)

Cheers,
Frozebyte

Something like this?:

Image

Posted: Sun Jan 17, 2010 5:38 am
by qwerty
Those springs there are made for DH bikes. I think your best bet is online.

Posted: Sun Jan 17, 2010 6:25 am
by frozebyte
the picture was just for reference, to show that im looking for springs like these :) i try to avoid online purchases :(

Posted: Sun Jan 17, 2010 9:25 am
by qwerty
Have you got an airgun/rifle shop near you? you could buy air rifle/pistol springs and use those.

Posted: Sun Jan 17, 2010 9:42 am
by FighterAce
I've found a few just like that in those automatic umbrellas where you just press a button and they open. They are plenty strong... I can tell ya that.

Heres a pic of the 2 I got...
Image

What do you need them for anyways?
It takes alot of force to compress them...

Posted: Sun Jan 17, 2010 9:46 am
by jackssmirkingrevenge
FighterAce wrote:What do you need them for anyways?
It takes alot of force to compress them...
The spring would be used in a spring-piston air pistol
Have you considered a gas ram instead?

Posted: Sun Jan 17, 2010 10:03 am
by FighterAce
since I dont know how spring-piston air pistol operates I'm asking what would the spring be used for.. specifically

Posted: Sun Jan 17, 2010 10:31 am
by Ragnarok
FighterAce wrote:They are plenty strong... I can tell ya that.
Nowhere near what you get in spring guns.

The spring that relived me of a large chunk of finger was extracted from an automatic umbrella, and I could actually "cock" that without any mechanical advantage - wasn't easy, but it was manageable.
I can't even come close to doing the same with the spring from my air rifle. It takes significant application of my weight simply to put the pre-load back on the spring after any servicing.

Also, if you don't know how a springer works, you'll want this link: http://www.arld1.com/pistonpelletdynamics.html

Posted: Sun Jan 17, 2010 11:19 am
by Heimo
Ragnarok wrote: Also, if you don't know how a springer works, you'll want this link: http://www.arld1.com/pistonpelletdynamics.html
got any more links like that?

will it help if I say please? :D

Posted: Sun Jan 17, 2010 11:46 am
by FighterAce
I know how they work its just that I was unaware of their name.

I dunno how strong springs are in real air rifles... I never had one and probably never will so I make my own.
For my bv trigger system I ordered my spring to specs at a shop, I think you could do the same if you find it.

Posted: Sun Jan 17, 2010 12:04 pm
by jackssmirkingrevenge
Heimo wrote:got any more links like that?
There's a whole bunch of them on the homepage.
It takes significant application of my weight simply to put the pre-load back on the spring after any servicing.
Agreed with Rag here, most people don't realise the size of spring that's in a commercial spring air rifle.

This is the (broken, I took it apart to replace it) spring on my HW45 pistol, even on a relatively low powered gun it's a very substantial thing.

Image

Image

In short, like I always say, it is much easier to build a high powered pneumatic than a high powered springer.

Posted: Sun Jan 17, 2010 12:15 pm
by kjjohn
McMaster has a large selection of springs of varying size and tension.

In fact, for my upcoming piston hybrid, I will be using a compression spring that takes 600 lbs to fully compress. It is only $13 from McMaster.

Posted: Sun Jan 17, 2010 12:20 pm
by Heimo
jackssmirkingrevenge wrote:
Heimo wrote:got any more links like that?
There's a whole bunch of them on the homepage
yea I noted that a few moments after posting, thanks anyway

Posted: Sun Jan 17, 2010 2:44 pm
by Ragnarok
FighterAce wrote:I know how they work its just that I was unaware of their name.
That's really not the impression I'd get from "since I don't know how spring-piston air pistol operates".
But even if you knew how the mechanism works, and couldn't associate "spring-piston mechanism" with it, at least I've done that for you.
johnsspecialrelativity wrote:Agreed with Rag here, most people don't realise the size of spring that's in a commercial spring air rifle.
Most high power spring rifles demand a spring compressor. To be able to remove or replace the spring without one is something of a rarity.

Posted: Sun Jan 17, 2010 3:10 pm
by FighterAce
Ragnarok wrote:
FighterAce wrote:I know how they work its just that I was unaware of their name.
That's really not the impression I'd get from "since I don't know how spring-piston air pistol operates".
But even if you knew how the mechanism works, and couldn't associate
I was guessing it had to do something with a spring holding the piston in a piston valve... I was experimenting with spring-piston a few years back. I had the basic idea but no clue how the mechanism was called. I didnt even wonder how it was called. In the end it didnt work out very well because I had a weak spring in it. Its been quite some time since then so I totally forgot about it... thanks for reminding me tough, I found a place where you can get your springs made to specs so I could give it another shot.