coaxial.piston.

[FORE!!!!]

Well here is my first coaxial piston gun, its made from aluminium tubing, i found in side a laser printer refill cartrigde ( the main roller,the green tube) with a 5 mm barrel (bore) 4mm,refill is via quick connect and is piloted by a blow gun.. the piston is made from a timber broom stick cut to size with a neoprene sealing face and semi-resessed o-ring ,all joints are epoxy resin

[jackssmirkingrevenge]

Epoxy FTW!



I always wanted to use one of those printer tubes for something. What pressure are you running at? Small calibres usually perform best in the 250 psi+ range.

[inonickname]

Cool..

I'm designing two co-axials at the moment, one in the 400-800 psi range (.38 cal) and one in the 800-1200 psi range (.75 cal, 750+ Ft/lb!).

Is it serviceable? may be something to consider in the future.

[Mr.Sandman]

I think you would find it more comfortable if you switched the blowguns place with the quick connect. Oveall nice gun like the shiny barrel. Hows it in the power department?

[qwerty]

Cool. Check out mine.

[clemsonguy1125]

what are the barrel spacers

[jmadden91]

Nice gun mate. What epoxy resin do you use FORE!!!?

[FORE!!!!]

thanx. I was a little disapointed with its performance because im limited because of my compressor to 145-150psi,itll put a shish kabab stick through a cardboard box ,but thats about it.

The epoxy i used was panal metel to hold a 1/2''x1/4'' threaded reducer inside the tube and then it had a further coat of epoxy,araldite eqivelant slow cure on the outside for a nice coating on the panel metel.
the front end cap was just plain epoxied no panal metal.

spacer looked like this=