[TheForge] Air Cylinder (actuators)

Mon Jan 6 12:39:01 2003

Aha~! Sorry- I didn't deduce that from your message. Re-engage brain here- clik!-
I'm by no means an expert but I will give an example: On the Nazel the drive cylinder is 13" dia while the ram cylinder is 12" ALTHOUGH most of the ram cylinder volume is consumed by the ram and the cylinder head.  I have not calculated a volume ratio based on such but I would guess that it's approx. 4:1. Perhaps others would care to speak up here (Bob B or Smolen?). The general thinking from the home-made self-contained crowd of late is that you want a surplus of air available for delivery. What you don't need can be vented off but if it's not there in the first place...

Steve
.........................................

-----Original Message-----
From: DragonsWatch [mailto:[email protected]]
Sent: Monday, January 06, 2003 9:09 AM
To: [email protected]
Subject: Re: [TheForge] Air Cylinder (actuators)

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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