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

[Larry Brown]

I took the course with Sid a few years back and he said that if it wasn't
going fast enough and didn't have the right spring it would never hit right.
I was working on one that someone had stepped down and when I eliminated the
jack shaft and got a new spring it changed it remarkably, I think he aimed
for 350 rpm, have it written down somewhere if needed

Larry Brown

-----Original Message-----
From: TheForge [mailto:theforge-bounces at mailman.qth.net] On Behalf Of David
E. Smucker
Sent: Thursday, March 19, 2015 11:09 AM
To: 'Blacksmithing List Sponsored by ABANA'
Subject: Re: [TheForge] Little Giant / pulley / rpm / ???

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

Freedom is a fragile thing and is never more than a generation away from
extinction. It is not ours by inheritance; it must be fought for and
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Those who have known freedom and then lost it have never known it again.

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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