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Small Bore Tease

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: jrrdw » Tue Jun 18, 2013 7:33 pm

Works but not reliably. I have more round bar coming in Thursday so I'm making a better cylinder, tighter tolerances to stop the piston tipping. That's the only down fall to a short piston that I can see.
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Unread postAuthor: jackssmirkingrevenge » Tue Jun 18, 2013 11:57 pm

Hmmm... how can it be o-ringed and tipping?

Maybe you need more space between the two rings, one on each extremity.
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Unread postAuthor: jrrdw » Wed Jun 19, 2013 5:32 am

I would have to make another piston to get the distance. It could be that the bottom edge is catching just enough to prevent movement, it wouldn't take much tipping to make that happen plus using a PVC cylinder makes for a easy grab on that edge.

Once I get a harder cylinder and tighten up the clearance between the piston and cylinder there will be no grabbing on the piston edge.
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Pneumatic Piston Tease_0008_RS.jpg
The 1" plug is stock length and just barley protrudes into the chamber port.
When life gives you lemons...throw them back they suck!
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Unread postAuthor: jrrdw » Wed Jun 19, 2013 5:32 am

I would have to make another piston to get the distance. It could be that the bottom edge is catching just enough to prevent movement, it wouldn't take much tipping to make that happen plus using a PVC cylinder makes for a easy grab on that edge.

Once I get a harder cylinder and tighten up the clearance between the piston and cylinder there will be no grabbing on the piston edge.
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Attachments
Pneumatic Piston Tease_0008_RS.jpg
The 1" plug is stock length and just barley protrudes into the chamber port.
When life gives you lemons...throw them back they suck!
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jrrdw
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Unread postAuthor: jrrdw » Mon Jul 01, 2013 3:23 pm

Set back :? because of a cheap tap! Need good tap or a metric drill bit for the size hole needed to keep from breaking cheap taps. There is just enough nub there to maybe weld a small nut to it, other wise drill a hole beside it or turn another cylinder...Either way, bummer!
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Broken Tap In Aluminum Cylinder_0001_RS.jpg
Geeeee...this really made my day.
When life gives you lemons...throw them back they suck!
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