Well... This is on topic because of what I plan on using it for... My
metalworking machines...

But ultimately, it might be an OT post.

I'm looking for a hydraulic cylinder that has exactly the same volume in
"front" and "back" so that I can link the two together without having
pressure variances / blowing the thing apart.

i.e. I want to literally put a hose from one inlet port to the other without
an accumulator.

Anyone know if such an animal exists?

Regards,
Joe Agro, Jr.
(800) 871-5022
(908) 542-0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

Forgot to mention. The catch is that I need the cylinder to be small.
Small being 3-12" long and no larger than about 2" in diameter.

Regards,
Joe Agro, Jr.
(800) 871-5022
(908) 542-0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

V8013-R


"Joe AutoDrill" wrote in message
news:va2Pf.643$ky1.332@trndny06...
Well... This is on topic because of what I plan on using it for... My
metalworking machines...

But ultimately, it might be an OT post.

I'm looking for a hydraulic cylinder that has exactly the same volume in
"front" and "back" so that I can link the two together without having
pressure variances / blowing the thing apart.

i.e. I want to literally put a hose from one inlet port to the other
without an accumulator.

Anyone know if such an animal exists?

Regards,
Joe Agro, Jr.
(800) 871-5022
(908) 542-0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

Any cylinder in which the rod goes out both ends should work, otherwise there
will always be less fluid volume on the end that has the rod in it .. GWE

Joe AutoDrill wrote:
Forgot to mention. The catch is that I need the cylinder to be small.
Small being 3-12" long and no larger than about 2" in diameter.

Regards,
Joe Agro, Jr.
(800) 871-5022
(908) 542-0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

V8013-R


"Joe AutoDrill" wrote in message
news:va2Pf.643$ky1.332@trndny06...

Well... This is on topic because of what I plan on using it for... My
metalworking machines...

But ultimately, it might be an OT post.

I'm looking for a hydraulic cylinder that has exactly the same volume in
"front" and "back" so that I can link the two together without having
pressure variances / blowing the thing apart.

i.e. I want to literally put a hose from one inlet port to the other
without an accumulator.

Anyone know if such an animal exists?

Regards,
Joe Agro, Jr.
(800) 871-5022
(908) 542-0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

In article 2b2Pf.3477$eJ1.1767@trndny05, says...
Forgot to mention. The catch is that I need the cylinder to be small.
Small being 3-12" long and no larger than about 2" in diameter.


A double rod cylinder will give you a constant volume.

What bore, stroke and pressure rating? Bimba makes a 500psi hydraulic
version of their SS throwaway cylinders. Though they don't list a double
rod hydraulic version, they do make similar double rod air cylinders, so
a special may not be out of the question.

PHD can do it for sure up to at least 1500 psi, but much more expensive
than Bimba.

It's also worth checking SMC.

http://www.bimba.com/
http://www.phdinc.com/
http://www.smcusa.com/

And these folks are a good source for unusual or special cylinders...
http://www.compactautomation.com/

Ned Simmons

According to Joe AutoDrill :
Well... This is on topic because of what I plan on using it for... My
metalworking machines...

But ultimately, it might be an OT post.

I'm looking for a hydraulic cylinder that has exactly the same volume in
"front" and "back" so that I can link the two together without having
pressure variances / blowing the thing apart.

i.e. I want to literally put a hose from one inlet port to the other without
an accumulator.

Anyone know if such an animal exists?

Look for a cylinder with equal sized rods coming out both ends.
If you find one, that should meet your requirements.

If you can't tolerate the second rod, you'll really need to make
some kind of accumulator to deal with the change in volume.

Good Luck,
DoN.
--
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---

Joe AutoDrill wrote:
Well... This is on topic because of what I plan on using it for... My
metalworking machines...

But ultimately, it might be an OT post.

I'm looking for a hydraulic cylinder that has exactly the same volume in
"front" and "back" so that I can link the two together without having
pressure variances / blowing the thing apart.

i.e. I want to literally put a hose from one inlet port to the other without
an accumulator.

Anyone know if such an animal exists?

Regards,
Joe Agro, Jr.
(800) 871-5022
(908) 542-0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com


Take a look he

http://surpluscenter.com/sort.asp?UI...earch=steering

Pete

Joe - how are you going to drive the cylinder? The equal displacement
cylinder implies a fixed displacement pump. Do you have any other ideas?

Hul

Joe AutoDrill wrote:
Well... This is on topic because of what I plan on using it for... My
metalworking machines...

But ultimately, it might be an OT post.

I'm looking for a hydraulic cylinder that has exactly the same volume in
"front" and "back" so that I can link the two together without having
pressure variances / blowing the thing apart.

i.e. I want to literally put a hose from one inlet port to the other without
an accumulator.

Anyone know if such an animal exists?

Regards,
Joe Agro, Jr.
(800) 871-5022
(908) 542-0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

On Mon, 06 Mar 2006 21:53:02 GMT, "Joe AutoDrill"
wrote:

Forgot to mention. The catch is that I need the cylinder to be small.
Small being 3-12" long and no larger than about 2" in diameter.

I think ive got a couple pneumatics that size......

Gunner


Regards,
Joe Agro, Jr.
(800) 871-5022
(908) 542-0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

V8013-R


"Joe AutoDrill" wrote in message
news:va2Pf.643$ky1.332@trndny06...
Well... This is on topic because of what I plan on using it for... My
metalworking machines...

But ultimately, it might be an OT post.

I'm looking for a hydraulic cylinder that has exactly the same volume in
"front" and "back" so that I can link the two together without having
pressure variances / blowing the thing apart.

i.e. I want to literally put a hose from one inlet port to the other
without an accumulator.

Anyone know if such an animal exists?

Regards,
Joe Agro, Jr.
(800) 871-5022
(908) 542-0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com





"A prudent man foresees the difficulties ahead and prepares for them;
the simpleton goes blindly on and suffers the consequences."
- Proverbs 22:3

"Joe AutoDrill" wrote in
news:va2Pf.643$ky1.332@trndny06:

Well... This is on topic because of what I plan on using it for...
My metalworking machines...

But ultimately, it might be an OT post.

I'm looking for a hydraulic cylinder that has exactly the same volume
in "front" and "back" so that I can link the two together without
having pressure variances / blowing the thing apart.

i.e. I want to literally put a hose from one inlet port to the other
without an accumulator.

Anyone know if such an animal exists?


Joe,
If you are using this as a feed control cylinder, you really should think
about adding a small resevior. Not only will this help with the volume
difference and allow you to use a single-rod cylinder, it will aide in
cooling, which is going to quickly become a problem if this is even a
moderately repetative cycle application.


--
Anthony

You can't 'idiot proof' anything....every time you try, they just make
better idiots.

Remove sp to reply via email

"Hul Tytus" wrote in message
...
Joe - how are you going to drive the cylinder? The equal displacement
cylinder implies a fixed displacement pump. Do you have any other ideas?

No drive. I want to use it in a unique application where the front and rear
ports are linked to each other with no accumulator.
--


Regards,
Joe Agro, Jr.
(800) 871-5022
(908) 542-0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

V8013-R

http://tinyurl.com/q4sjr

That is basically whant I'd like to find - but in a package that is 15" or
less in total length. One problem I have is that as he length gets shorter,
so does the overall "stroke" of the cylinder.

I'm shopping around.

Regards,
Joe Agro, Jr.
(800) 871-5022
(908) 542-0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

V8013-R