Here's my beauty, how can I calculate the tonnage of psi. I was told the motor is 18 hp.
When buying a splitter the tonnage ratings are usually exaggerated. Actual tonnage is
4" bore cylinder 18.8 tons max.
4 1/2" bore cylinder 23.8 tons max.
5" bore cylinder 29.4 tons max.
The least expensive splitters often use a MTE brand pump. Ninety-five percent of the pumps are manufactured by Haldex/Barnes.
The gpm rating of the pump will affect cycle times. A 11 gpm pump would be considered the min. for a 4" bore cylinder. A 16 gpm pump would be the min. for a 4 1/2" or 5" bore cylinder. Larger pump add speed but do not increase tonnage.
A 11 gpm pump requires a 5.5 to 6 hp gas engine.
A 16 gpm pump requires a 8 to 9 hp. engine.
A 22 gpm pump requires a 12 to 13 hp. engine.
Using an engine that is larger than required does not increase power or speed.
Hope this helps you.