muddstopper
Veteran Member
Tell us more about the setup you plan to build. What size are your hydraulic motors. How big a saw bar do you plan to use. What size saw chain. What speed you desire to run your saw chain. I have seen many saw designs where the improper hyd motor was selected and unsatisfactory performance was realized. This usually results in the builder either accepting the weak cutting performance or swapping out the saw motor for a different one, and even a few projects completely abandoned because the machine couldnt do what was needed.
Sequence of the hydraulics also plays a big part of the processing equation. Noting like waiting for the splitter to complete its cycle before you can make another cut, or waiting for the saw to cut a round before you can split it. There are times in the cycle where you are not using the full power of the splitting cyl or the saw motor. The saw only runs when it is cutting and the splitter only needs full power while it is splitting. The return of the cyl doesnt take as much power as it does to split. Usually while the splitter is actually extending, you will be advanceing the log for the next cut. By the time the cut is made the splitter is fully retracted and waiting for the next round to split. To small a saw motor or not enough oil flow will mean you splitter is sitting idle while it waits for the next round to drop. If timing is right, the next round should drop into the splitting trough just as the cyl is fully retracted. Most of the small factory processors use 25hp engines to pull all of the pumps. Some of the manufactors have started using little bigger engines to speed up the cycles times. With your 80hp engine, you should be easily able to pull a multiple pump setup and provide more then enough power for a very fast processor. Part selection is going to be key for performance. Hp cant make up the difference if you choose the wrong part combinations.
Often a saw motor is choosen because of rpms it will turn. While a gas saw might turn 9000 rpms, they have very little torque and need the rpms to make the cut. A proper hyd motor will produce more torque, but unless you go with a very expensive F11-F12 motor, they simply wont be able to reach the high rpms of a gas saw. It should be noted that gas saws have very small sprockets to pull the saw chain. With a hydraulic motor, you will be able to choose a larger dia sprocket to pull the chain. Most people look as rpms's when trying to guesstimate the speed their saw chain needs to run. this is a mistake. Chain speed should be measured in feet per min, and it is the easiest way to compare the saw to a known working saw that cuts at the speed you require. Rpm of motor, sprocket tooth count and chain pitch can be used to determine fpm cutting speed.
You asked for help chooseing a hydraulic pump to run your hydraulics, but you failed to give us the specifics of the parts you wish to use. Without the specifics of the saw motor, the size of the saw chain, or the sprocket to pull the chain, its simply not possible to choose the correct pump to run it.
Sequence of the hydraulics also plays a big part of the processing equation. Noting like waiting for the splitter to complete its cycle before you can make another cut, or waiting for the saw to cut a round before you can split it. There are times in the cycle where you are not using the full power of the splitting cyl or the saw motor. The saw only runs when it is cutting and the splitter only needs full power while it is splitting. The return of the cyl doesnt take as much power as it does to split. Usually while the splitter is actually extending, you will be advanceing the log for the next cut. By the time the cut is made the splitter is fully retracted and waiting for the next round to split. To small a saw motor or not enough oil flow will mean you splitter is sitting idle while it waits for the next round to drop. If timing is right, the next round should drop into the splitting trough just as the cyl is fully retracted. Most of the small factory processors use 25hp engines to pull all of the pumps. Some of the manufactors have started using little bigger engines to speed up the cycles times. With your 80hp engine, you should be easily able to pull a multiple pump setup and provide more then enough power for a very fast processor. Part selection is going to be key for performance. Hp cant make up the difference if you choose the wrong part combinations.
Often a saw motor is choosen because of rpms it will turn. While a gas saw might turn 9000 rpms, they have very little torque and need the rpms to make the cut. A proper hyd motor will produce more torque, but unless you go with a very expensive F11-F12 motor, they simply wont be able to reach the high rpms of a gas saw. It should be noted that gas saws have very small sprockets to pull the saw chain. With a hydraulic motor, you will be able to choose a larger dia sprocket to pull the chain. Most people look as rpms's when trying to guesstimate the speed their saw chain needs to run. this is a mistake. Chain speed should be measured in feet per min, and it is the easiest way to compare the saw to a known working saw that cuts at the speed you require. Rpm of motor, sprocket tooth count and chain pitch can be used to determine fpm cutting speed.
You asked for help chooseing a hydraulic pump to run your hydraulics, but you failed to give us the specifics of the parts you wish to use. Without the specifics of the saw motor, the size of the saw chain, or the sprocket to pull the chain, its simply not possible to choose the correct pump to run it.
