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Using a magnet to hold ball bearing ammo in position

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Using a magnet to hold ball bearing ammo in position

Unread postAuthor: Ianbuckwell » Sat May 03, 2014 1:22 am

Just read about an air gun using a magnet, I thought this was a great idea if only intent on using steel rather than any other material, I thought I could use one of these new small high power magnets which would only need a small hole drilled, jhave read of others cutting slots for O rings to make a detent but I thought what a great idea, in my vision of my gun I will have a tube storing the bearings in sequence attached to the top of the barrel with a long spring in the end of the tube to move the balls along, once they reach the barrel the magnet would hols the ball ready for firing, the last few balls may require gravity once the spring is fully extended.

Can anyone see any problems with this setup? Has it been done by the diyer before? If so any links? The only thing I can see is the wasted air/delay each time the gun is fired and the ammo tube is depressurized. So need to design away where the tube is kept pressurized or at least or reduce the size of the ammo tube to maybe 6 balls which are pretty much perfect fit in the tube.

Any opions/ideas appreciated, thanks


edit : one concern I did have was if the ball storage magazine was run parallel with the barrel, I would need to ensure that the 90 degree fitting did not taper in to.a smaller diameter as some copper one seem to, so thought I can either use a brass elbow or a T piece as the brass fittings seem to be molded rather than extruded? Like the copper ones, therefore retaining the internal diameter.
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Re: Using a magnet to hold ball bearing ammo in position

Unread postAuthor: jackssmirkingrevenge » Sat May 03, 2014 4:38 am

If done right, ie the magazine tube is a very tight fit for your balls ( :D ) it should work something like this:

Image

Magnets have been used to hold the ball in place no problem.
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Re: Using a magnet to hold ball bearing ammo in position

Unread postAuthor: Ianbuckwell » Sat May 03, 2014 6:01 am

As long as tolerances ade tight do you think the air keep repressurizing the tube will be negligible? Just don't want to waste pressure that can be powering my ammo! :)
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Re: Using a magnet to hold ball bearing ammo in position

Unread postAuthor: jackssmirkingrevenge » Sat May 03, 2014 7:18 am

Ianbuckwell wrote:As long as tolerances are tight do you think the air keep repressurizing the tube will be negligible?


That's the theory ;)

Here's one I had made in action, at less than 100 psi:



This is the magazine design I was using, with 0.22" pellets:

Image
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Re: Using a magnet to hold ball bearing ammo in position

Unread postAuthor: Ianbuckwell » Sat May 03, 2014 11:51 pm

So using ball beArings in place of pellets should make it even easier as they don't need to turn the 90 degrees.
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Re: Using a magnet to hold ball bearing ammo in position

Unread postAuthor: bravootome » Sun May 04, 2014 12:53 am

Here's one I had made in action, at less than 100 psi:

nice stuff you got on your channel. i am curios how much pressure had you put in that propan tank from the picture above .
i just feel every time i fill the gun that it's just ready to explode........
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Re: Using a magnet to hold ball bearing ammo in position

Unread postAuthor: jackssmirkingrevenge » Sun May 04, 2014 4:54 am

Ianbuckwell wrote:So using ball beArings in place of pellets should make it even easier as they don't need to turn the 90 degrees.


Yup, did that too ;)

Hopper view:



Target view:



Damn, my old cellphone camera videos look like crap :roll:

i am curios how much pressure had you put in that propan tank from the picture above .
i just feel every time i fill the gun that it's just ready to explode........


Which one do you mean?
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Re: Using a magnet to hold ball bearing ammo in position

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Re: Using a magnet to hold ball bearing ammo in position

Unread postAuthor: bravootome » Sun May 04, 2014 1:27 pm

Which one do you mean?[/quote]

the picture from above your youtube channel. That yellow Propane tank attached to a gun.
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Re: Using a magnet to hold ball bearing ammo in position

Unread postAuthor: jackssmirkingrevenge » Sun May 04, 2014 7:34 pm

bravootome wrote:the picture from above your youtube channel. That yellow Propane tank attached to a gun.


Not my design but this: pneumatic-cannons/topic22340.html

Still one of the most attractive spudguns I have ever seen!
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Re: Using a magnet to hold ball bearing ammo in position

Unread postAuthor: bravootome » Mon May 05, 2014 12:58 am

jackssmirkingrevenge wrote:
bravootome wrote:the picture from above your youtube channel. That yellow Propane tank attached to a gun.


Not my design but this: pneumatic-cannons/topic22340.html

Still one of the most attractive spudguns I have ever seen!



ha ha, you told him something about 100 psi.....i put 450 psi i a " baloon" exactly like his. :D
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