Pneumatic Planishing Hammer

Does anyone have any experience with pneumatic planishing hammers?

The one I am looking at will allegedly shape 16 guage (2mm ish?) mild steel.

How good/easy are they to use? Is there anything I should look for or be wary about?

The unit I am looking at is in China. Unfortunately there dosnt seem to be any for sale second hand in Australia tho there are a few in the US.

I cant seem to copy the picture from the email I have, but it is basically a small air hammer mounted in a "C" shaped steel frame with a shaped anvil below it and a foot operated on/off switch. It does 1600 blows per minute and runs off 12cfm air.

thanks

Peter


Rich Waugh's picture

That sounds like the same

That sounds like the same sort of unit that Harbor Freight Tools sells in the US for about $130. My brother has one and says it does the job okay. Tremendously noisy, of course, so you have to wear hearing protection.

It is fairly easy to build a rig like that if you have a welder. The power head is nothing more than a muffler gun air chisel clamped to the upper arm, with a domed head in it. The lower anvil needs to be adjustable for height and made to take different radius heads. The foot pedal can be had for forty bucks at most discount tool sources, or you can make your own from a ball valve and a bit of welding.

The ne plus ultra of planishing hammers is the Pullmax, which can be used for serious forming work, but costs in the tens of thousands of dollars. It all depends on what you're doing, I suppose.


warren's picture

peterg, as the name as the

peterg,
as the name as the tool applies it is for plannishing. Therefor if you have a sheet of metal with walnuts or bumps from shaping and forming with a hammer or other power tool and you want to smooth the surface they will work. They are not intended to shape or form metal.
Plannish hammers will work okay on sheet metal. They are not worth crap, my opinion, if working on copper or brass. Good hammer and stake works just as well.

warren
http://www.flickr.com/photos/metal_recipes/


visitor's picture

Shaping with a planishing hammer

I have shaped with a pneumatic planishing hammer, using linear stretch dies. It works pretty well, if you don't want too radical a shape. I still have some pieces around that I did that way, reverse curves.

They are unbelievably noisy, I would never own one unless my shop was a long way from anywhere, or in an industrial area. Use earplugs and headphones, both.

If you have a pneumatic planishing hammer you don't really need an English wheel, it will smooth it out pretty well.

Figure to make some of your own dies.

Richard


PeterG's picture

Thanks for the information

Thanks for the information and advice. I really just need it for fairly rough work in steel,(most of my sculpture is rough) such as shallow dished shapes and texturing surfaces. It sounds as if it isn’t as versatile as I had hoped so I might try and find one locally to play with first.


Gene Olson's picture

Peter,

Peter,
They work, they are noisy.
the HF one I bought works fine on zinc and al

I would want a harder hitting hammer for steel especially 16 ga. It would work for 20 ga steel, just slower 18 ga too but again slower.

For large surface areas to smooth and form, an English wheel is fast, controllable and quiet. It's my choice when I can get the part into the machine.
The planishing hammer can get into closer corners and may be better for most sculpture stuff because of that, but still there are lots of angles it can't get too.
Often times it is just faster to hand work the part, than to set up either for the job at hand.

and oh, btw.
There is a Metalmeet (sheet metal addicts get together in OZ this week. . . .
Dandenong - bayswater victoria hmmmm mean anything to you.

The thread on the meet can be found over on metalmeet at:
http://www.metalmeet.com/forum/showthread.php?p=91668&postcount=37

If you can get there, do. Cause you will learn a lot about moving sheet steel.

Gene Olson
Sculptor
Elk River, MN