[TheForge] power hammer

Wed Mar 26 07:02:01 2003

        Steve, Nice to see you joining in here.  Those industrial forging
hammers with the posts.......are those also called board hammers?
        I toured a shop out east here, and the fellows made sergical
equipment with hammers like that.  They were "drop" hammer of sorts they
called them.  They had HUGE flywheels up top, and drove oak planks with
drive rolls from 8-10 feet up with a 1200 lb ram and could hit about 3 times
per second..........I was amazed at how fast they operated.
        The other thing that was really different about these hammers is
they were like an iceburg...............3/4 of the anvil was underground.
These guys had the whole thing rigged on giant spring platforms underneath
so you could hardly fell the hammer fire off.  They made 6,000 pairs of
surgical scissors per day, so I really got the feeling these guys weren't
screwing around.  They kept us there until 9 that night from closing time
talking about how to make dies, Hobbing a die, digitizing the patterns, etc.
It was an amazing field trip that came from a phone call asking me to move a
"drop hammer"...........I didn' realize the old ones they had needed a crane
to take them out of the towers built into the building they were
in..........so they were over my head to move.
        I had envisioned the drop hammers often seen around Rhode Island for
jewelry, or other places in New England that I'd seen them for cuttlery.

Ralph

----- Original Message -----
From: "steve parker" <[email protected]>
To: <[email protected]>
Sent: Tuesday, March 25, 2003 9:06 PM
Subject: [TheForge] power hammer

To cameron stoker
The hammer your friend christopher has sounds like a industrial die forging
hammer. These hammers typicly have a 20:1 ratio for the ram and anvil.
Have you seen this hammer? I think i talked to this guy about a year and a
half to two years ago about this hammer.
Does the hammer have columns thats set on top of the anvil base? If so this
is a die forging hammer. For closed impression die forging. A five hundred
pound chambersburg C frame  air hammer would not have that big of an anvil.
I run a 4B nazel everyday of the week. I believe the anvil on this hammer
wieghs about 7000lbs.
I have'nt posted here before but i get the postings on my email. This just
got my interest.
I know a few folks that do post here often, like ralph sproul and bob
bergman .
Hope this helps
steve parker.

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