[TheForge] treadle hammer anvils

Fri Jan 10 04:42:00 2003

I still have plans to modify my air hammer to be used as a treadle hammer, I
think a spring and the bottom of the cyl filled with about 30psi will do it,
(that was after a quick'n dirty test) everything else is already there.

----- Original Message -----
From: "Peter Fels and Phoebe Palmer" <[email protected]>
To: <[email protected]>
Sent: 09 January, 2003 8:50 PM
Subject: Re: [TheForge] treadle hammer anvils

> At 06:14 AM 1/9/03, you wrote:
>
> Hello Bob:
> First, a harder hitting hammer allows you to sink a larger tool into the
> metal, or do a given piece of work with less swats.
> When I first built my TH I used a piece of heavy H beam under a stack of
4,
> 1" plates welded up for the anvil.
> In retrospect, the plates should have been welded edge up to minimize the
> energy lost to the cold shuts.
> Because the hammer is about 95#, the anvil was too light, so I fish-plated
> the  open sides  of the H beam with 1/2" plate and filled it with sharp
> sand. It was stiffer and quieter but just wasn't cutting it. When a bunch
> of heavy scrap plate came to hand, I cut off the fish-plate and welded in
> 8" strips of plate inside the H beam on both sides 'till it was
> solid..think I burned 70# of rod on it trying to make as solid as
possible.
> It made a significant difference. Off the top of my head, I'd guess it
> saves one out of every 4 or 5 blows or better.
> I don't think additional bolt on weight  will do much good. Think of how
it
> feels to work on an anvil with a separating  face plate. The utility of
> sand is sound damping , and  you get some "dead blow" effect out of adding
> concrete to your assembly..but not much benefit in terms of work.
> Please note that my TH hammer is large and heavy and slow compared to
> Jere's..but I don't have to hit things as often...Neither do I have to
move it.
> By way of contrast; talked to one smith who had his 500# anvil on a
> swinging base so he could swivel it into position under his TH head, which
> had only a 30# head but long arms and a 6' swing!..
>                       have a splendid new year!....Pete
>
>
> >i am building a treadle hammer for a friend. he is not sure whether to go
> >with a solid anvil or a tube type. it seems that most commercially
> >available t hammers have tube anvils with a plate on top, centaur,
> >kirkpatric (the same?) and the one advertised in the hammers blow.
> >
> >are there others that can be bought?
> >
> >any opinions on the functional difference between solid or tube anvils?
> >the guy i am making it for is concerned about moving it (weight). he
lives
> >in a flood plain and his shop has 7' of water in it some springs. he
> >usaully loads thing up and moves it to high ground till the water goes
down.
> >
> >bob s.
> >
> >
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