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Help With Making A Hammer?

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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Help With Making A Hammer?

Unread postAuthor: Major Collins » Wed Mar 23, 2011 6:01 am

i am face with the the challenge of making a hammer roughly 17 mm circumference without a lathe... what do you guys suggest?

by the way how heavy should it be its hiting a blowgun valve stem

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Unread postAuthor: jrrdw » Wed Mar 23, 2011 6:34 am

As in a gun hammer?
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Unread postAuthor: Major Collins » Wed Mar 23, 2011 9:19 am

yeah lol , not an actual hammer already got 2 of them ha
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Unread postAuthor: Crna Legija » Wed Mar 23, 2011 10:11 am

buy some 17mm steel round bar?
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Unread postAuthor: Gaderelguitarist » Wed Mar 23, 2011 10:14 am

already got 2 of them


Geez, I have probably 15.

Basically you want to look at this thread.

His diagram shows how his hammer valve works, and would be easy to duplicate.

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Unread postAuthor: Major Collins » Wed Mar 23, 2011 11:28 am

what do you do with 15 hammer lol a bit excessive

and i know how it works , i just need to make the hammer i already have a button/poppet valve (whichever you prefer to call it) made .
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Unread postAuthor: Gaderelguitarist » Wed Mar 23, 2011 6:10 pm

Each hammer has a purpose, from my various sized ball peen hammers, to my carving hammer, dead blow mallet, and various claw hammers.

Well you could probably make a weighted hammer from washers and nuts on threaded rod. This would make it easily align with your hammer spring. I only included the diagram to get some ideas flowing.
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Unread postAuthor: mark.f » Wed Mar 23, 2011 6:56 pm

I have an 8 oz. peening hammer and a 16 lb. sledge. I figure if one doesn't work the other one will. :lol:

As to the hammer, plain steel stock 17mm in diameter is the simplest solution. Denser materials could be used but things like lead will deform against the harder valve pin.
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hammer making

Unread postAuthor: Major Collins » Fri Mar 25, 2011 7:30 am

if i were to melt enough silver solder into a tube and let it dry to make a cylinderr would it be strong , and heavy enough to be used as a hammer?
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Unread postAuthor: mark.f » Fri Mar 25, 2011 8:05 am

I highly suspect it would deform when striking your valve pin/actuator.
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Unread postAuthor: Gippeto » Fri Mar 25, 2011 8:05 am

Why not simply epoxy a bolt in that same tube running lengthwise?

Need more mass....use a larger (diameter) bolt.

What are you building?
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Unread postAuthor: wyz2285 » Fri Mar 25, 2011 8:50 am

Fiber glass past, when it's ready it has enough mass and strength, but it would be better if you glue a metal plate on the surface of the bolt that hits the pin.
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Unread postAuthor: Major Collins » Fri Mar 25, 2011 9:29 am

so an epoxied bolt should be enough? how much should it weigh and does that even matter?

@Gippeto
its a hammer for hitting a hammer valve
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Unread postAuthor: Gun Freak » Fri Mar 25, 2011 5:29 pm

The weight matters, but we need to know the specs of you valve; pressure, seat diameter etc.
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Unread postAuthor: Gippeto » Fri Mar 25, 2011 9:09 pm

With the "right" spring, a piece of steel 3/4" diameter and 1 1/4" in length will be more than enough to open a valve with a sealing diameter of .27" @ 2000psi.

Use a 3/8" bolt and call it good. Striker travel should be ~ 1 1/2" depending on the spring.

Cheap to change later to get more power or more shots/fill.
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