log splitter tonnage formula ?

[Stubby]

Ok . I have a 13HP ( Honda GX390 ) engine . A 16 GPM pump and a 4" dia Ram . What tonnage am I getting ?

[treequip]

The Units needed for the calculation are area (of the ram) and pressure

[Vespasian]

be interesting to find out, toying with the idea of building my own splitter as well..

[treequip]

be interesting to find out, toying with the idea of building my own splitter as well..

 

Force is a function of pressure and area So multiply the units of force by the units of area

[aspenarb]

Fart about with this Stubbs Hydraulic Cylinder Calculator

 

I reckon about ten ton but dont confuse cylinder OD with piston diameter.

 

Bob

Edited May 12, 2016 by aspenarb

[openspaceman]

Ok . I have a 13HP ( Honda GX390 ) engine . A 16 GPM pump and a 4" dia Ram . What tonnage am I getting ?

 

I assume you mean the piston is 4" diameter otherwise you need to subtract the cylinder wall thicknesses as Bob points out.

 

If you aim for 2000 lb/inch^2 then given the surface a of the piston is ~12.5 inch^2 the ram will push just over 11 ton but at that flow rate you would need 22 horsepower in the fluid, at 70% efficiency you would need and engine capable of producing 32hp and this would assume the pump input torque matched the engine output torque

Edited May 12, 2016 by openspaceman
saw Bob's earlier reply

[timbernut]

If it's any help my processor runs off a Honda same as yours and the ram is about 3.5" diameter not sure of pump size but it runs on a trio of belts from the engine to shaft with pump at back and 700mm blade at other then belt for conveyor it uses 8 t on hare speed and 15 on tortoise speed.

Hope that's a bit of help (and makes sense😀)