[TheForge] Hydraulic press questions.

[Bob Ehrenberger]

Shannell,

Here is my take on some of your questions.

1. Guides are a good idea for control, and the life of the cyl.
2. Some are designed to be rebuilt.
3. We just used a simple "L" bracket and LoveJoy connectors.
4. We haven't used our press for drifting. May in the future.
5. We have our foot pedal sprung to stop when released. I think that auto
rise would be bad since we usually position the top die just above the work
for quick response. It would be nasty to have 6" of travel every time we
took out hot steel.
6. We have the two speed pump. But I would prefer just a low speed pump
since it is easy to go too far too fast. I would rather have more control.
7. If you have the stuff in salvage, you can try it, but it may burn up the
motor. If you are buying new get stuff that matches.
8. I don't think guards are necessary on a press. I don't see any parts that
are at risk like on a trip hammer. And you need to keep the dies open.

Bob Ehrenberger
Shelbyville, Mo

From: "Shannell Sugrue" <sjs@ihug.com.au>
To: <theforge@mailman.qth.net>
Sent: Wednesday, March 19, 2003 10:49 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?
> 2. Are all hydraulic cylinders rebuildable? Id like to save some money
here.
> 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?
> 4. Is an opening under the bottom die a good idea for pushing tooling etc
> all the way through?
> 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?
> 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.
> 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?
> 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?
>
> Thanks to anyone who has time to answer any of these questions
>