What size cylinders do I need?

[HCJtractor]

I am building an implement that will lift hydraulically. Two wheel assemblies running separately but synchronized with a flow divider. The weight will be around 1500 lbs and the pump is a 12 V model with a 2 gal. Reservoir. How do you figure cylinder size? I need a 8" stroke. Whatcha think? A 2.5 or 3" pair of cylinders? What criteria determine this?

 

[J_J]

2.5 in cyl
1 in rod
1500 psi

- push force = 7,363 lbs

3 in cyl
1.5 rod
1500 psi

- push force = 10,603 lbs

This force is a straight on push. When you angle the cyl it changes things, and if the load is not at the cyl connection points, that also changes things.

As the load moves further from the lifting point, the less load you can lift, until you run out of lifting potential.

Look at a engine lifting A frame.

The cyl is connected to a certain point. You slide the boom in or out for different lifting weights. Close in, you might lift 1000 lbs, Boom extended all the way, might be only 250 lbs.

Sometimes the tipping point is determined by the weight behind the load.

There is a certain load on my loader bucket that will raise the rear end of the machine in the air.

 

[ch47dpilot]

try this they have most of the answers for you hydraulic needs: Surplus Center - Tech Help