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Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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jmccalip
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So I made this. UHMW 3" piston. 10 and 3/4 oz.


Grrr, I need to return this stock to Mcmaster. I bought the wrong size.
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I'm still waiting on the mailman to deliver my grooving tool.

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Gippeto
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Ooooo...Pretty. :D


Waiting for a "grooving" tool?? Why?

Grind a form tool from a HSS blank, or use your parting tool. That's what I do.
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jmccalip
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Gippeto wrote:Ooooo...Pretty. :D


Waiting for a "grooving" tool?? Why?

Grind a form tool from a HSS blank, or use your parting tool. That's what I do.
I don't have a decent grinding wheel, and I don't use a parting tool.


And for whatever reason, my belt decided to break as I turned on the lathe. No problem though, I just cut a piece of weedeater line and fused it together. Works great, haha...knocks on wood. :lol: Sure beats paying $15 for one online and then waiting a week to get it.
Last edited by jmccalip on Fri May 15, 2009 11:42 pm, edited 1 time in total.
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inonickname
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I wouldn't bother making a grooving tool from HSS, you need to remove a lot of material and they go dull fast. As gipetto said, just use your parting (cut off) tool. Hell, if your steady enough you can just hold a saw to it (saw blades can also make average temporary parting tools).

Though very nice piston, what's it for? (a cannon obviously)
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CasinoVanart
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Nice work considering the belt was weed eater line!!
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Technician1002
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jmccalip wrote:So I made this. UHMW 3" piston. 10 and 3/4 oz.

That's sweet. Can't wait to see the video of the finished cannon. One quick question, what is the valve seat size going to be? 2 inch, 2.5 inch?
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