[TheForge] Interesting homebrew power hammer f/s (Ontario, Canada)

[Mike Spencer]

Terry wrote:

tlr> Granted I have only the picture to go by and may be missing
tlr> something obvious, but it appears to me that the ram is
tlr> eventually going to wear on the front and the anvils will no
tlr> longer hit square.

PF's observation:

pf> I'd guess the top of the tup has 2 rollers for the end of the
pf> spring.

might well be correct.  That the spring appears to extend out beyond
the tup is consistent with that idea. A nice solution if so.

The Palmer hammer had a flexible joint in the spring's
centre-mount. It can be seen (if not too clearly) here:

   http://home.tallships.ca/mspencer/old-hammer.html

The whole spring can move a little fore and aft on pivots held by two
massive cheek pieces.

And it didn't totally solve the problem: The ram guide and adjustment
shims were worn such that there was no way to get a good adjustment.
Either the ram was too tight or it shucked for and aft in operation.
I never got keen enough to take tedious measurements and have the ram
and shims lightly milled.  I don't think the present owner has,
either.

bruce> Methinks the anvil should be solid, not the tubing that seems
bruce> to be shown in the photo.

Yeah.  Bur he's selling his gear. Maybe he learned better, one way or
another. :-)

bruce> Not clear what is used as ram bearings.

Looks like just a sliding fit, steel on steel, doesn't it?

pf> Pleasingly minimal and low cost...Sure not a lot of extra parts
pf> though!.

May say dat!


- Mike

-- 
Michael Spencer                  Nova Scotia, Canada       .~. 
                                                           /V\ 
mspencer at tallships.ca                                     /( )\
http://home.tallships.ca/mspencer/                        ^^-^^