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Pneumatic Cylinder/Actuator

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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Pneumatic Cylinder/Actuator

Unread postAuthor: Goats spudz » Sat Oct 15, 2011 12:32 pm

Can anyone Come up with a cad drawing of a single action pneumatic cylinder? pretty please :D
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Unread postAuthor: pneumaticcannons » Sat Oct 15, 2011 12:45 pm

sure........................................................ if i had cad :lol:
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Unread postAuthor: Goats spudz » Sat Oct 15, 2011 12:48 pm

pneumaticcannons wrote:sure........................................................ if i had cad :lol:
i came up with this :) ( i know it sucks)
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spring return.jpg
my lame ms paint drawing
spring return.jpg (28.81 KiB) Viewed 888 times

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Unread postAuthor: al-xg » Sat Oct 15, 2011 2:12 pm

If you gave some dimensions it would be pretty easy to do...
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Unread postAuthor: Gun Freak » Sat Oct 15, 2011 2:59 pm

Why would you need a cad drawing of one?
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Unread postAuthor: Goats spudz » Sat Oct 15, 2011 3:14 pm

al-xg wrote:If you gave some dimensions it would be pretty easy to do...
if your unclear on anything tell me because i drew this in like 5 mins... and if possible in a format that can be machined by a cnc lathe
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Unread postAuthor: al-xg » Sat Oct 15, 2011 3:27 pm

The CAD model will need to be run through some CAM software to produce the G-code or whatever the machine controller reads.
And of course you need to know which tools you have available what machine you are running etc... So not something that can be done for you at a distance.

Are you planning on getting it machined professionally ?


As far as the design is concerned, having it split in the middle is a problem as drawn, as the cylinder bore has to keep the same diameter/be smooth for O-ring to seal... etc.
I'd recommend having a threaded plug at one end instead.

Do you want the same wall thickness on the cylinder ends ?

By indent do you mean the O-ring groove ? If so is the piston one part or does the rod separate ? Glued/ treaded... ?

Also thread lengths ?

Mmm also the spring, although it will compress there is a point where the spires will touch, ideally you'd want the piston to stop before that point. I'm guessing 15mm is the stroke you actually need ?
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Last edited by al-xg on Sat Oct 15, 2011 3:42 pm, edited 3 times in total.
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Unread postAuthor: Goats spudz » Sat Oct 15, 2011 3:32 pm

al-xg wrote:The CAD model will need to be run through some CAM software to produce the G-code or whatever the machine controller reads.
And of course you need to know which tools you have available what machine you are running etc... So not something that can be done for you at a distance.

Are you planning on getting it machined professionally ?
yes at my dads work they specialize in hydraulic stuff and there is a machine shop with all kinds of goodies... and its fine if you just draw a clear cad model because i can get it machined by hand :D btw he works here http://www.lasershapes.co.uk/
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Unread postAuthor: Alster370 » Sat Oct 15, 2011 3:37 pm

Damn why does everyone had useful connections apart from me? :lol:
Fancy giving me a spudfiles discount on a machined breech and bolt? :D
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Unread postAuthor: Goats spudz » Sat Oct 15, 2011 3:39 pm

Alster370 wrote:Damn why does everyone had useful connections apart from me? :lol:
Fancy giving me a spudfiles discount on a machined breech and bolt? :D
Haha :D my bro works there too he's the laser cutter operator!
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Unread postAuthor: al-xg » Sat Oct 15, 2011 3:41 pm

I edited in a few questions.

If the part is going to be machined manually you might as well just do a clean 2D drawing on paper with all the dimensions, who ever is doing to machining will be doing it from a 2D drawing.
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Unread postAuthor: Alster370 » Sat Oct 15, 2011 3:44 pm

You could get pretty much anything manufactured fee of charge then? You could make such a nice gun If you put your mind to it :wink:
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Unread postAuthor: Goats spudz » Sat Oct 15, 2011 4:02 pm

ok thanks for teh help! :D i have drawn it in 2d with all the measurements! and my dad says he will give it to martin the machinist at his work, i will post pics when i get it :P EDIT: Alster-> there really busy most of the time so it takes time for things to get done
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