I burn 2 or 3 cords a year. I was looking at the $320 Earthquake splitter from Lowes, I saw a video on it. I want a better splitter than this. I want one lever control. I am willing to spend a thousand dollars.
I burn 2 or 3 cords a year. I was looking at the $320 Earthquake splitter from Lowes, I saw a video on it. I want a better splitter than this. I want one lever control. I am willing to spend a thousand dollars.
I built mine with a 2 hp 220v, 1750 rpm ( pretty sure on the rpms) single phase motor, 4inch cylinder and an 11 gpm pump. I had the motor on hand and thought I would need to replace it with a larger one. That was at least 15 years ago, although I have used it sparingly the last six. While the wedge will lodge in some large knarly pieces I have been very satisfied with it.I have seen other home builds with undersized motors, I just wonder how they survive when making pressure. The math says those motors are making over 6hp under full load. Mine has a 1.8 gpm high pressure stage instead of the regular 3-3.5 gpm.
Mine
11 gpm
3hp
4" cylinder
3200 psi
20 tons
Pumps are rated at 3600 rpm, so you are getting about 4.5/1.5 gpm, which reduces the hp to what your motor is rated for.I built mine with a 2 hp 220v, 1750 rpm ( pretty sure on the rpms) single phase motor, 4inch cylinder and an 11 gpm pump. I had the motor on hand and thought I would need to replace it with a larger one. That was at least 15 years ago, although I have used it sparingly the last six. While the wedge will lodge in some large knarly pieces I have been very satisfied with it.
I’ve never figured out hp ratings. Skill saws are advertised at over 2hp. The splitter’s 2hp is very heavy, something you wouldn’t want to lug very far. Also, I was told that a industrial electric motor can be the equivalent to a gas engine twice the hp.
Pumps are rated at 3600 rpm, so you are getting about 4.5/1.5 gpm, which reduces the hp to what your motor is rated for.
Power tools are commonly rated in locked rotor amps, which they convert to hp. It's crooked as hell, but thats how they do it. There is no way a shopvac can pull 6.5 hp from a 110 outlet.
A heavy motor is good because it can generally run a bit harder before it cooks.
Gas vs electric is different because electric motors have "constant torque" and gas has pulses that are evened out by a flywheel. An electric motor has a magnetic field that is constantly twisting it. It is constant power/torque and the load has no time to drag the rpm down. Electric motors also draw more power as the load increases.
The gas engine has a quick push and then 2 full turns of nothing but drag. That gives the load plenty of time to drag the rpm down, because there is no power going into the system. Now the engine has to make enough power to keep the system going PLUS bring the rpm back up.
A gas engine will fall of the torque curve and stall under a heavy load, with no damage to the engine, it just stops.
An electric motor will draw more power as the load increases and when the load becomes too much, they burn up, or stall and then burn up.
So yes, going from gas to electric lets you drop the hp in some applications, but you need to be careful not to drop it too far, because you will burn up an electric motor where a gas engine would just bog down and quit.
Your’e right. That speed doesn’t make sense. The rpm is 3420. I knew I matched it to a northern tool 11gpm pump but it bugged me enough to go out with a mirror to get access to the spec plate.Pumps are rated at 3600 rpm, so you are getting about 4.5/1.5 gpm, which reduces the hp to what your motor is rated for.
Power tools are commonly rated in locked rotor amps, which they convert to hp. It's crooked as hell, but thats how they do it. There is no way a shopvac can pull 6.5 hp from a 110 outlet.
A heavy motor is good because it can generally run a bit harder before it cooks.
Gas vs electric is different because electric motors have "constant torque" and gas has pulses that are evened out by a flywheel. An electric motor has a magnetic field that is constantly twisting it. It is constant power/torque and the load has no time to drag the rpm down. Electric motors also draw more power as the load increases.
The gas engine has a quick push and then 2 full turns of nothing but drag. That gives the load plenty of time to drag the rpm down, because there is no power going into the system. Now the engine has to make enough power to keep the system going PLUS bring the rpm back up.
A gas engine will fall of the torque curve and stall under a heavy load, with no damage to the engine, it just stops.
An electric motor will draw more power as the load increases and when the load becomes too much, they burn up, or stall and then burn up.
So yes, going from gas to electric lets you drop the hp in some applications, but you need to be careful not to drop it too far, because you will burn up an electric motor where a gas engine would just bog down and quit.
How is this working out for you so far? I'm thinking of getting the same unit. Did you also get the stand for it?I got the Boss yesterday. I tried it out on some red oak and it worked quite well. Great little machine.
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