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

Thu Mar 19 18:09:30 EDT 2015

Be sure to check the amp draw on the motor when done.
It is possible the current setup reflects the capacity of the motor.

On 3/19/2015 1:08 PM, Bob wrote:
>      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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