Anyone knowledgeable in hydraulic motor sizing?

[jwmorris]

What would be the specifications for a hydraulic motor that would run something like an 18" saw blade?

We used 7.5 hp 3ph motors on them for wood defect saws. They were overkill, Boeing used them to cut aluminum (different blade).

In any case, I was thinking about using hydraulics to power one of the extras I have but do not know much about hydraulic motors or at least how to pick the right one at a given GPM or results if the wrong choice was made?

I only have 8 gpm and I don't think that will be enough but could use a pto driven pump. Intermittent use cutting branches as far as more time off than running.

What would the people "in the know" recommend?

 

[oldnslo]

Are the electric motor direct drive or is there a V - belt drive? If V-belt What RPM do you want this blade run at?

 

[MossRoad]

You kinda gotta work backwards.

Determine the RPM you want the blade to spin.
Then you determine the GPM that you have.
And you need the PSI of that GPM.

There are hydraulic calculators at Surplus Center.

You plug in those numbers and it will tell you the cubic inch displacement of the hydraulic motor you will need to achieve that RPM.

Surplus Center

Warehouse distributor for many top name manufacturers. Parker Hydraulics, Hypro Pumps, Prince Hydraulics. Direct from the factory. Surplus equipment. We buy large quantities of manufacturer's surplus or excess stock.

www.surpluscenter.com

 

[oldnslo]

To size a motor correctly you need desired torque and RPM. Then back figure required GPM and pressure. This usually leads to some give and take since you are trying to balance available HP and possibly available flow.

Starting with given flow and pressure Moss is correct that will dictate motor size which then correlates to a given torque.