Talk:Hammermill

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Is there maybe somewhere else this is discussed?

here is some unsourced but very authoritative sounding text I nicked from User_talk:Noisy#Trip_hammers_.2F_Babbage that may be relevant.

Hi Noisy. Re tilt/trip hammers, they are the same. There is a variation to this called a belly helve, where the hammer shaft is pivoted at the end, and the cams run under the middle. These hammers tended to be much heavier and used for masssive forge jobs like anchor-making. I do not know about contunually running hammers, though at places like Abbeydale making edge tools, I would, have thought they would have been ketp running during a shift.

There was a variation to the design in hammers used for making brass battery. The structure was generally lighter, and they ran faster - 100-150 blows per minute. The increased speed gave an impetus to the hammer shaft from the cams, which drove the hammer-shaft end d own onto a metal striking plate on the hammer frame, and the rebound from this gave a heavier stoke. The hammers were almost bird's beak-like in shape for getting down inside the brass bowls. For making brass sheet the hammers had a flat end. The brass need to be annealed to make it workable, and as the hammering progressed it work-hardened, so the operative knew when it was time to re-anneal by a change in the musical note the metal gave off as it was struck. Needless to say chronic deafness was usual among brass workers of that era. Rolling mills were in use then for narrow sheets, but the battery hammers were needed for the big sheets for brass battery.

I can let you have references for this if you need it. (supplied by Apwoolrich: [1])

[edit] Feedmachinery.com

I have seen this link being added and removed several times now. I support inclusion of this link as it is quite informative. It is, in my view, good enough to reference, so if this article is ever brought up to snuff and properly referenced, it would be included that way. I'd appreciate people not removing it without first taking a good look at it, it has far more detail than the article itself does and is only mildly commercial. ++Lar: t/c 13:37, 13 January 2007 (UTC)