Recommendation? Redbeard ops Press

magicweed

magicweed

Joined
Sep 21, 2023
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4
I am in the process of gathering the parts to build The Redbeard Ops Press, I live in Australia

1. I have a DC Motor Single Phase 5HP Asynchronous Electric Induction Motor 3450RPM AC Current Rigid Mounting ODP for Air Compressor Strong Load Capacity
2. Yaegoo 11GPM 2Stage Hydraulic Log Splitter Pump, 3000PSI
3. VEVOR Hydraulic Oil Tank Fuel 10Gal Hydraulic Reservoir Steel w/ Filter & Gauge
I am unable to find 1 Spool 20 GPM Prince RD-2575-T4-ESA1 DA Valve at a realistic price under ($400.00
I can get both of the ones listed below for under ($100.00
1-Spool Hydraulic Directional Control Valve P40 SAE Ports Double Acting NEW AU
or a
1-spool Hydraulic Directional Control Valve 3600PSI P40 SAE Port Double Acting

and a 2" Bore x 8" Stroke Heavy Duty High-Pressure Hydraulic Cylinder rated 3000psi

I do not know which one would be the best for the press

any advice would be gratefully appreciated

and thanks to Readbeard ops for his very good help to me
 
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Redbeard has a good press for sure. Have fun building the press, it looks like you've got most parts. A couple of comments.

The 2" bore cylinder will only produce 4.5 tons at 3,000 psi, and I wouldn't expect you wish to run the cylinder at it's max rating. I'd think perhaps 2500 psi would be a better pressure to use for 3,000 psi rated equip which would give "almost" 4 ton rating.

Here's a calculator to check ram size:

You'll see a 4" ram is just about right for a good 16 ton press. With 5hp you could even go with a 5" ram for a 20 ton press at 2,000 psi for easy load on the hydraulics.

Are you saying you have both a DC motor and an AC motor? If you have a 5hp 1ph 3450 rpm AC motor, that's just fine and will work really good. Most hydraulic pumps here in USA tend to be rated around 3K rpm for full output. I'm not sure what the electrical system is in Australia - 220 vac?

Your 2 stage pump is good.
 
I agree that a bigger cylinder would be wise.

As for the direction control valve, you need a one spool directional control valve. 20GPM is bigger than most log splitter valves (11 to 13GPM) a
Try these in eBay:
Hydraulic Directional Control Valve 1 Spool 21 GPM NPT Ports 3625PSI
Hydraulic Directional Control Valve 21GPM Double Acting 1Spool w/conversion plug
 
thank you for the replies

The Power for Homes in Australia is 240vol

Redbeard ops recommend this motor (however he states he does not have one)
VEVOR 5HP SPL Air Compressor Electric Motor, 208-230V FLA-16.0A, 56 Frame 3450RPM, 5/8" Keyed Shaft, Single Phase AC Motor for Home and Small Shop Air Compressors

The motor I have purchased is a DC Motor Single Phase 5HP Asynchronous Electric Induction Motor 3450RPM AC Current Rigid Mounting ODP for Air Compressor Strong Load Capacity

The ram data is Bore Size 2” Stroke 8” Shaft Diameter 1 ¼” Closed Length 20 ¼” Port Size ¾” UNF UN ORing Pin Diameter1”

Would this 1-Spool Hydraulic Directional Control Valve P40 SAE Ports double-acting do what I want as the hydraulic control lever?

or could someone maybe suggest a more appropriate Hydraulic Directional Control Valve as said Some Items are all most in possible to get in Australia (or you have to sell your house) to pay freight and handling and send the supplier on a week's vacation the the Moon or Mars LOL
 
magicweed said:
thank you for the replies

The Power for Homes in Australia is 240vol
Click to expand...
A question that has no bearing on this thread, but is the 240 volt on one hot wire and one neutral wire? OR, is it like here in USA with 2 hot wires with perhaps a neutral and each wire measuring 120 vac to neutral and 240 between the two hot wires?

magicweed said:
The motor I have purchased is a DC Motor Single Phase 5HP Asynchronous Electric Induction Motor 3450RPM AC Current Rigid Mounting ODP for Air Compressor Strong Load Capacity
Click to expand...
That sounds like two different motors - one sounds like a DC motor, and a "Single Phase 5HP Asynchronous Electric Induction Motor". A DC motor is NOT an induction motor. If you have a single phase 5 hp motor, that should work just fine. The DC motor will also work if you have the DC supply and wiring for it.

magicweed said:
The ram data is Bore Size 2” Stroke 8” Shaft Diameter 1 ¼” Closed Length 20 ¼” Port Size ¾” UNF UN ORing Pin Diameter1”
Click to expand...
We talked about the cylinder, you need a 4" bore for 16 ton range. Use the webpage links to calculate tonnage.
magicweed said:
Would this 1-Spool Hydraulic Directional Control Valve P40 SAE Ports double-acting do what I want as the hydraulic control lever?
Click to expand...
Well, the 1 spool is what you need. The Directional Control Valve sounds good. SAE ports are good as that's NPT from what I understand. I'll allow Stacy to comment on the double acting. What you do want is a control valve that allows pressure from pump in, with handle (that springs back to center) in center position the pump needs to circulate the oil out another port back to the tank. Then two ports for the UP 'n Down stroke of ram outlets. As ya'll can see I'm not at all versed with the control valves.

From my understanding this item on ebay should be what you're looking for. Put this "255569910312" in the ebay search bar and the valve should be the only one to come up. When I searched Stacy's links there were several valves that came up, but I think they're about the same as the valve linked above.

Stacy - I think I'm ok with giving the numbers to search on, if not, delete or something.

Ken H>
 
That valve should work.
Double acting simply means the control arm moves both directions as well as spring loaded center. One direction sends the hydraulic fluid to one end of the cylinder and the other sends it to the opposite end. This allows you to move the cylinder up and down.

As said by both of us, you really want a 4" cylinder. If you use a 2" cylinder you might as well drip everything else to 11-13GPM. The ram on a 4" cylinder has four times the surface area of a 2" cylinder, thus four times the power. The only way to compensate for a smaller cylinder is to greatly increase the pressure ... which is a really bad idea. Far better to run a larger cylinder at the normal pressure and a higher flow rate pump.
 
Thanks Stacy - that's what I though double acting would be but wasn't sure. Yep, it would take around 10,000 psi to get 16 ton from a 2" ram.

His 11 gpm pump will work just fine with a 4" ram. My Coal Iron press has a 12 gpm rated pump, but only delivers ab out 6 gpm due to a 1725 rpm motor. While it's a tad slower than desired, it's still adequate at 1.8 inch/sec. The 11 gpm pump calculates to 3.4 inch/sec which is plenty fast. The 12 ton Coal Iron press I ordered delivered a calculated 3.3 inch/sec with the 3" cylinder that came on it, but only delivered 8 ton pressure with the 2250 psi they set the system to rather than the 2550 spec'd which would have given 9 ton. Still a LONG way from the 12 ton they advertise. I'm not sure if they still use the 3" cylinder or not, but I'd sure check before ordering one. I changed to a 4" cylinder that allows me to get the full 12 ton at only 2,000 psi. There is a difference between 9 ton and 12 ton.
 
I missed the 11GPM pump. I assumed it was faster because he was listing a 20GPM valve. If the pump is 11GPM any basiic log-splitter valve will work fine. They are usually 11 to 13GPM. Nothing wrong with the 21GPM, though.
Anything that reduces fluid resistance will be good.

Now, if it was me building it I would use a 21GPM pump. That will double the ram speed. Faster ram stroke = more presses per heat.

Another suggestion is to automate or hands-free the press in some form. It can be electronic with a solenoid valve or as simple as two foot pedals to control up and down. Simple linear actuators or solenoid arms attached to the handle work just fine.
 
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Thanks Ken

We have 3 wire system with two active and earth 240volt black, brown/red, green earth

I found this 4" Bore x 8" Stroke Heavy Duty High-Pressure Hydraulic Cylinder and It's located in my Town

So now I have the 1-Spool Hydraulic Directional Control Valve 3600PSI P40 SAE Port double-acting
 
If you check with the place that had the cylinder, I bet they have - or know where to get - a control valve.
 
LOL now why didn't I think of that

thank you for the poke in the chest (sometimes we need it)

thank you all
 
Looks like you've got everything to make the press - do you have the steel yet?

BTW, Is it the AC 240 vac 1ph motor you've got, and NOT a DC motor? Perhaps you could post a photo of the name tag?
 
I think the DC is a mistype of some brand. The motor that fits his description is an AC compressor motor with an open frame OPD = Open Drip Proof. My concern is that it needs to be kept away from the grinder dust.
 
I was thinking something along those lines myself, a mistype. As far as the open motor - that shouldn't be a real problem for a home shop. I doubt he'll be doing much grinding while the press is in operation. After press use, just drop a towel over the open motor to prevent dust from getting in while grinding. That's what I do with my NEMA 1 VFD drives, even with the inlet air filters I've added, I still place a drop cloth over the VFD when not in use to protect from dust.
 
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