[TheForge] Air Cylinder (actuators)

Mon Jan 6 13:49:00 2003

larry,

the configuration on the photo site was posted by me. whether it will work in the real world is still a question. mark krause made one that worked but (last i heard) he was having problems scaling it up to a bigger hammer. the ideal porportions have yet to be worked out (afaik). mkrause used 2-1 on his small hammer. too much air is as much problem as too little. it (the air) has to go somewhere or you will be bound up with air working against you. throttling may also be a problem.

bob s.
______

>Hi Steve,
>    I am in South Central Texas.  What I am trying to figure is if I use my 4" cylinder as a pump cylinder, can I drive a 2" cylinder.  I am trying to figure the ratios required to operate a hammer in the
>configuration as on the photoaccess site.   I was hoping to configure a self contained home built configuration.
>
>Thanks for the info.
>
>Larry
>
>Howell Steve wrote:
>
>> Larry-
>> Most guys run 2 to 2 1/2" cylinders for 50-100 lb hammers.
>> A 2.5" cylinder at 100psi has close to 500lbs of force, by itself!. I run a 100lb head unsing a 2.5" cyl. at 120psi. and it works WELL.
>> The limiting factor for most guys is the supply of compressed air. To get good performance out of either of the above configurations you need at least a two-stage five HP that'll give you ~90 psi at 18cfm
>> Where are you located?
>>
>> Steve Howell
>> Seattle
>>
>> -----Original Message-----
>> From: DragonsWatch [mailto:[email protected]]
>> Sent: Monday, January 06, 2003 7:24 AM
>> To: [email protected]
>> Subject: [TheForge] Air Cylinder (actuators)
>>
>> I once posted that I wanted to convert a LG. to air power.  After
>> reading the numerous posts and looking at several home built hammers, I
>> have come to wonder.  How large of a air actuator is required to operate
>> a 50# hammer?  One I have seen, (not in operation) one that looks to
>> have a 2" cylinder on it.  No one was available to ask about it at the
>> time so I could not get details on its performance.  I'll get more info
>> on it later as it is at a local college I have enrolled in.
>>     So, if a 2" cylinder can operate the ram, will a 4" cylinder operate
>> the 2" cylinder?  Is there a known ratio that is required here?  Is it
>> written down some where accessible?
>>
>> Thanks,
>>
>> Larry
>>
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