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

Thu Mar 19 14:08:17 EDT 2015

     A 2 1/4" motor pulley at 1725 RPM will drive a 10" pulley at 388 RPM.

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 defended constantly by each generation, for it
comes only once to a people. Those who have known freedom and
then lost it have never known it again.

Ronald Reagan

On 3/19/2015 1:57 PM, Dave Mudge wrote:
> Well, lets expand on the original question.
> Given I would want the end result to be about 375 rpm.
> Also given that I have a 1725 rpm input (motor)
> and the final drive is a 10" pulley, what size pulley
> would I need to put on the motor?
> Also,,, as one addresses the hammer from the front,
> which direction should the crank plate turn? clockwise or counter-clockwise?
> thanks, everyone for all of your input...
> dave m
>
> On Thu, Mar 19, 2015 at 12:48 PM, Dave Mudge <dave at magichammer.net> wrote:
>
>> that sounds like Mr. Clifton. What a great character.
>> I have seen his power hammer vcr's
>>
>> dave m
>>
>> On Thu, Mar 19, 2015 at 10:41 AM, Bob <blcksmth at wcnet.org> wrote:
>>
>>>      Many years ago at S.O.F.A. I asked Clifton Ralph how fast a power
>>> hammer needed to run. I was building a line shaft driven shop.
>>> After about a 45 minute lecture about everything except my question he
>>> asked me "How fast do you want to hammer?" Class over.
>>>
>>> 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 defended constantly by each generation, for it
>>> comes only once to a people. Those who have known freedom and
>>> then lost it have never known it again.
>>>
>>> Ronald Reagan
>>>
>>> On 3/19/2015 11:09 AM, David E. Smucker wrote:
>>>
>>>> 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
>>>> defended constantly by each generation, for it comes only once to a
>>>> people.
>>>> 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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