Custom

[pump]

sorry for the Up...not really

but i have a cocker jam bolt and 2 neodymium magnets and they fit in perfectly

wondering what kind of glue is best to use....would Crazy Glue work? or would Shoe Goo be better?


do you have any problems with the magnets shattering?

[Anonymous Coward]

Use 2 part epoxy glue. Simple glues like super glue don't hold well over time.

The main thing you have to make sure is the magnets don't touch. Two reasons on what I call the magnetic horizon. Simular to an event horizon. It's the point where magnetic forces overcome the opposing force keeping magnetic parts apart. Sounds like an awesome marketing term! Magnetic horizon bolts! Sounds sweet.

First when rare earth magnets come together they generate slightly over 2 times the pull they had as individuals. That seperation point is usually to strong beyond the breaking point of paint. If you keep the magnets slightly seperated, then that seperation point of force is weakened.

Second is when the magnets seperate and the bolt recocks the two magnets will want to re-enage. There are so strong that even a tiny distance of travel can splinter or break the magnets. I have lost over $85 now in magnets from them flying towards each other and breaking in other experiments of mine. (I'm working on a springless blowback.)

There are several things you can do. Either have the rear magnet adjustable as it's attached to the screw. Or place a small rubber gasket/oring between the magnets. Either way you want that seperation.

[pump]

yeah i was using the JAm bolts nut to slightly back out the screw....just so its not touching

but i would prefer some bumper material instead, but cant seem to find anything thin enough

im also skeptical if the magnets i have are hard enough....well see


well good idea on the mod....this jam bolt feels much better already

[pump]

well my magnets are WAY too weak and the bolt cant handle the cycling.........either i might try and use springs or try and find some stronger magnets

[Anonymous Coward]

You are probably using ceramic or molded magnet. Those are not strong enough. Here is where I got mine. When I hand them to my buds they are always surprised in their strength.

Strong Neodymium Magnets Rare Earth K&J Magnetics

[pump]

i got neodyium...there just thin...thanks for the link


i think im gonna try and do this to all my bolts.....i chop with a pump....but i am not a ethical pumper

[Twilight]

I'm no physicist so I'm just speculating...

Someone mentioned the linear force of spring. Since we're dealing with magnetic force, which might be exponential (this is where my lack of physics comes in), it might have too much force on the paintball.

In addition, I wonder about the timing of the bolt movement.

Sounds like an awesome idea though.

[Akallabeth]

Great idea for the anti-chop bolt!

Reading this thread gave me some thoughts on using a magnet for an anti-chop in a regular Spyder bolt/striker setup, but I do not have enough experience with magnets (or Spyders, for that matter) to know if this would work.

Basically, my thought was that the connecting pin could be shortened, and a cylindrical magnet could be placed in the now-empty hole in the striker. If the magnet was strong enough, it would then hold onto the remaining portion of the pin, and hopefully move the bolt like normal.

The flaws I see are mostly that I don't know how strong/durable this magnet would be, don't know exactly how much force the magnet would be required to hold instead of the pin, don't know what would happen to the air/CO2 that wasn't being used to propel the PB, and there are probably others I haven't thought of.

Does any of this sound like it might work? Thanks!

[Anonymous Coward]

I see what you are going for and applaud you adding to this. But I'm not so sure that would work. What you are discribing would place the magnetic force perpendicular ( up and down ). It's far easier to shear the pulling force of a magnet that way. Either seperaion would come from the initial throw of the hammer or the air blast blowing the hammer back. To compensate you'd need to inlarge the bolt and hammer pin holes greatly for much larger magnets. That downward and upward attraction would cause some drag along the wall of seperation between the hammer and bolt.

Plus most hammers are made from hardened steel, once the bolt seperates from the hammer you want to magnet to realign with the pin. Problem is it might not reallign and be attracted to another part of the hammer.

If you buy an anti-chop bolt, make contact with Dan Sergison and he can retro fit it for you.