[TheForge] Little Giant / pulley / rpm / ???

[David E. Smucker]

Dave,  I believe this number to be correct,  It is slow for a 25 # Little
Giant -- most were set up to run between 350 to 400, 375 being a good
number.  Remember these hammer were built mostly for drawing out and for
drawing out plow points as their bread and butter job.  The high beats per
minute work great with the lower weight hammer of the 25 #.  Force = 1/2
mv^2.  So while the mass is low in the 25# LG the velocity is high and it is
squared.  Ever see Jerry Darnell hammer -- light hammer very high beats per
minute, really moves the metal.

Speed the hammer up.

Dave Smucker 
Brasstown, NC

-----Original Message-----
From: TheForge [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Bob
Sent: Wednesday, March 18, 2015 11:24 PM
To: Blacksmithing List Sponsored by ABANA
Subject: Re: [TheForge] Little Giant / pulley / rpm / ???

     1725 divided by 5 = 345
     345 times 8 = 2760
     2760 divided by 10 = 276

Bob Willman
The Eagle's Anvil
Bowling Green, Ohio
WB8NQW

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Ronald Reagan

On 3/18/2015 11:06 PM, Dave Mudge wrote:
> Good evening kids,
> I am setting up a nice 25# Little Giant hammer and i have some questions.
> This hammer came with a 1-1/2 hp. motor connected to a speed reducer.
> The motor turns at 1725 rpm, connected to a reducer that is 5:1. The 
> output of the reducer is connected to an 8" flat belt pulley and the 
> hammer has a 10" flat belt pulley..........
> Of course the question is, How fast will the hammer be turning if I 
> use this set up?
> I don't recall ever seeing a hammer set up in such a fashion, on the 
> other hand I haven't seen everything by a long shot. So why do you 
> think that the hammer was set up like this?
> In the book, "The Little Giant Powerhammer" by Richard Kern it says 
> that the speed should be around 375 rpm.
>
> Thanks,
> dave m
>

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