[TheForge] flypress

Fri Sep 26 07:27:00 2003

My flypress moves about 5/16" for a typical swing where you keep your 
hand on the handle (you don't "let fly"). This amounts to about one foot 
of travel around the perimiter. So mine moves roughly 3" if you move the 
handle in a full revolution.

I never end up using it that way, I use short blows repeated, such as 
you would do in splitting a groove.

Steve Smith

Bob Smolen wrote:

> David,
> Thanks for the info.
> The difference in the screw was my understanding as well. How much
> difference does the extra travel of a flypress make in the use of tooling? A
> 3 start 3tpi (as on a flypress) will move the ram 1" per rev of handwheel. A
> single start will move it 1/3 of an inch. If a full turn of a screwpress
> goes 1/3inch, that would push a punch or splitter nicely .Is that too much
> effort for using tooling?There aren't many times when 1/3 in. movement in
> one stroke  is obtained thru other means. I have seen the pictures of guys
> forging tenons with a flypress.  I am not as interested in forging with a
> press, more interested in quiet use of tooling. Can somone comment based on
> their experience?
> Thanks,
> Bob
> 
> 
> ----- Original Message -----
> From: "David E. Smucker" <[email protected]>
> To: <[email protected]>
> Sent: Wednesday, September 24, 2003 6:21 AM
> Subject: Re: [TheForge] flypress
> 
> 
> 
>>One major difference is the screws.  Most screw presses or tryout presses
>>used in a die shop are built with a single tread on the screw (screw tread
>>starts at on point.)  This is slower acting but produces high force or
>>tonnage.  The flypress now being sold for blacksmithing have  mutli tread
>>screws.  Some up to four treads starting at the same point.  They have 4
>>time the lead for the same pitch of thread.  This means that the screw
>>advances 4 times as fast as a single screw.  Still a lot of force but not
> 
> as
> 
>>much as a single tread -- but 4 times the speed.  Said to be "better" for
>>forging.  Really depends on what you are doing.
>>
>>Dave Smucker
>>----- Original Message -----
>>From: "Bob Smolen" <[email protected]>
>>To: <[email protected]>
>>Sent: Tuesday, September 23, 2003 10:39 PM
>>Subject: [TheForge] flypress
>>
>>
>>
>>>Can someone explain the difference between  the popular flypress used by
>>>blacksmiths and the screw press or tryout press used in die shops. How
> 
> are
> 
>>>they different?
>>>Thanks,
>>>Bob
>>>
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> 
> 
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