high pressure piston help

[spudtyrrant]

i made a metal piston gun it worked great for about 3 shots and then the wood piston i had made broke so you guys have any ideas for a piston about an 1 1/2 long that will fit inside a 3/4 inch galvanized nipple ty

[Carlman]

Did you use a bumper?

[spudtyrrant]

i built a rubber bumper for it i also probably shouldn't use wood at 400psi

[Technician1002]

i made a metal piston gun it worked great for about 3 shots and then the wood piston i had made broke so you guys have any ideas for a piston about an 1 1/2 long that will fit inside a 3/4 inch galvanized nipple ty

HDPE works fine. Here is an inch and a half piston made for my Mouse Musket, a coax with a 2 inch chamber and 1 inch barrel. It wouldn't take much to adapt this to other sizes. My barrel has an o ring seat, so the piston does not need a rubber face. I made it that way to make the piston lighter.

[spudtyrrant]

i would be cool but i don't have any readily available hdpe nor any ability to accurately machine it (at the moment) i was thinking a hot glue piston do you think that would hold up to 400 psi

[Technician1002]

i would be cool but i don't have any readily available hdpe nor any ability to accurately machine it (at the moment) i was thinking a hot glue piston do you think that would hold up to 400 psi

How did you make the wood one?
HDPE can most often use the same tools.

HDPE often comes disguised as a cutting board.

[spudtyrrant]

i used a sweeper sick and some sand paper lol also i was trying to do it with things i had on hand i didn't want to have to order anything

[spudtyrrant]

i dont have cutting board either is their any other easy simple materials i can use for my piston

[Carlman]

Ive used hot glue at 350 in my brass HP gun over 50 times so far altough im swithcing out to epoxy for neatness and to handle the aussie heat

[Gippeto]

Look here;

http://www.spudfiles.com/forums/valve-q ... 18298.html

[Moonbogg]

http://www.mcmaster.com/#8701k43/=228crr

?? Just over $1.00 per foot.

[jmccalip]

Give me $2 for shipping and i'll mail you a small piece of either 1" or 2" HDPE. I bought the wrong size, so I'm not using them.