[TheForge] Hydraulic press questions.

Thu Mar 20 19:38:00 2003

Answers in text......
----- Original Message -----
From: "Shannell Sugrue" <[email protected]>
To: <[email protected]>
Sent: Wednesday, March 19, 2003 11:49 PM
Subject: [TheForge] Hydraulic press questions.


> I have thought of a few questions I hope I can remember them all-
> 1. Guides- are they mandatory? Ive seen a few presses on the net that just
> rely on the cylinder to be the guide, if you limit the travel from being
> able to go to the bottom of the cyl will this be enough or is 25+ tonnes
way
> to much force to consider this?
        --------------------------------------
        Use guides of some sort
        -----------------------------------------
> 2. Are all hydraulic cylinders rebuildable? Id like to save some money
here.
        --------------------------
        there are cheap welded cylinders - that aren't that rebuildable
        --------------------------------------------
> 3.Does every pump need a bellhousing to mount to the motor? the ones Ive
> priced here did, can you not just mount the two in a way that they mate
ok?
        -----------------------------------------
        adapter housing is the best for alignment, but not necessary.  Use a
flexible coupling, but you'll spend your time making the pump mount and
getting alignment.
        -----------------------------------
> 4. Is an opening under the bottom die a good idea for pushing tooling etc
> all the way through?
        -------------------
        Yes
        -----------
> 5. Anyone using a foot pedal to control the press? Something spring
operated
> so foot off means press rises? is this a good safety idea or does it make
it
> less safe?
        ------------------------------
        Yes, I have on posted on the photo site.  a Butterfly pedal is what
you want....NOT a spring return.  It has to go both ways.
        --------------------------
> 6. I mentioned this in a previous email
>  " someone suggested using 2 pumps one high flow one high pressure and a
hi
> low valve to shut one out when the pressure rises"
> is this a good or bad idea? it was a little cheaper.
        --------------------------------
        buy a two stage pump. my 2 cents
        --------------------------------------
> 7. If I buy a pump that need 5hp and run it from single phase 3 hp would I
> get close to 3/5's the flow/pressure?
        -------------------------------
        No, on the high pressure end, it would stall.
        --------------------------------
> 8. They press photos Ive seen didnt have any sort of guards, seems like a
> good idea to me or will they get in the way too much?
        ----------------------------------------
        they'd get in the way
        ----------------------

Ralph
>
> Thanks to anyone who has time to answer any of these questions
>
>
>
>
> _______________________________________________
> http://mailman.qth.net/mailman/listinfo/theforge
> theforge mail list group photo site is
> http://www.photoaccess.com
> Login:  [email protected]
> password:  anvil
> ___________
>
>