[TheForge] Fly Press

[GHS]

The point being that YOU have to reverse
the direction. I have seen (pictures)
units with a large fly wheel that
rotates continually, and that have a
clutch. The overall effect is pretty
much that of a slower, more powerful and
much larger little giant on which the
ram rides up and down the screw. I know
that is muddy, but I still lack coffee.

The distinction that I was told is that
while all fly presses are screw presses
not all screw presses are fly presses.
The difference being the repetitive
motion of the ram and the continuous
rotation of the flywheel mechanism.

That is the best that I can do right
now. Sorry. 

I know that the term fly press is widely
applied to both. The only reason that I
make this distinction is that, before I
got my screw press, I had read
descriptions of people using fly presses
which implied the repetitive stroking. I
had also read descriptions of the
mechanics which described how this was
accomplished.

When I located my screw press and went
to look at it it was evident that it was
not what I was expecting.
As I was not going to use it for
repetitive stroke operations it did not
matter. It did drive home that there
were actually two different tools
involved. Since then I have seen that my
confusion was not do to me, for once.
They are both commonly called fly
presses.

Mike Graf

Chris Worsley wrote:
> 
> What?
> My fly press (an Adams #2) ram screws down as the overhead weighted bar is turned clockwise and goes up when I reverse the direction of the bar. One course threaded screw does it all. Sounds like what you are calling a screw press, but it is a "fly press" by all who know it.
> 
> Chris
> 
> GHS wrote:
> 
> > I think it might to be to your advantage
> > to differentiate between fly and screw
> > presses. A screw press is a one shot
> > down and then manually bring it up for
> > another try. In a fly press the flywheel
> > actually screws the ram back up along a
> > reverse thread and then returns it down
> > when it reaches the top. As long as the
> > flywheel is turning the ram keeps
> > pumping.
> >
> > switz@mindspring.com wrote:
> > >
> > > All of the talk about forging presses ahs got me thinking about a press.  I am more interested in a Fly or Screw Press.  Mostly because I curently don't have any poser to the shop & the house is all solar power.  Non-power tools are a bit easier to make use of right now.  Any body have any experience or thought regarding the Fly Press?  How big of a press would be useful for the average shop (I know it all depends, but a good starting point would be nice)?  Are there any advantages of a Fly Press over the Hydraulic Press?  Finally can a large Fly Press do everything a small one could do, or are they to much for the more delicate work?
> > >
> > > Thanks
> > >
> > > John
> 
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