LD1
Epic Contributor
I have some air handlers at work on the job since 1995... they have 10 and 20 hp Baldor 3 phase motors... in 22 years I have only replace one bearing on one motor that was noisy... the motors run 24/7 for months at a time and are made in USA
Maybe some motors are just better built and under rated by the manufacturer?
Motors arent underrated. They are rated for exactly what they can handle. Then there is a service factor (SF) on the nameplate. A good heavy duty industrial type motor is usually 1.15. That means that the motor is actually designed to handle 1.15 times its rated HP and FLA long term with no ill effects. Most homeowner stuff is usually 1.0. So anytime you go over on the current rating, you are doing irreversible damage. A good analogy I have always heard is similar to the way the doctors (and those safety videos) describe hearing loss. Effects are cumulative.
As to your 10 and 20HP motors that have lasted 22 years......
Running a motor, 24/7....under constant load and constant speed is the single best way to make a motor last. Constant starting and stopping, or varying loads.....that will wear out a motor faster.
At work, we have a pair of 300HP compressors. They run 24/7 constant load. Also have a 425HP compressor of the same make, but its the trim compressor. (variable speed) based on plant demands, it can vary its motor speed, and vary its loading to meet plant demands. And for the 3 years its been installed, that motor has been out and rebuild 4 different times.
Wrong. You're just going to have to toss the cheap or the single phase idea. I've got 3 phase power and the scrap yard is littered with 3 phase motors. It wouldn't cost much ( unless you're factoring in the high flow hoses and valves which cost a lot) for me to build an electric splitter to smoke a gasoline splitter. Problem is I don't have 3 phase where I want to split wood.
240v single phase is more than capable of powering splitters at the same rate as a gas motor. And they are not as rare as people think.
Most 11gpm pumps have a low speed of 1.7-1.8gpm and at 2500psi that needs 3HP
The 13gpm pumps are 2.9GPM on low That calls for 4.97 HP.....so a 5HP motor will do there
16gpm on second stage is 3.5gpm. That calls for 6HP.......so a 7.5HP motor is needed
A 22gpm pump on second stage is ~7gpm......so that would require 12hp........15HP needed
Surplus center has
3HP.....$500
5HP.....$800
7.5HP.....$931 (which pulls 32a)
Yes, 15hp single phase motors are harder to source, and would pull north of 60a. But just how many of us are using a 22gpm pump.
And for a 16gpm splitter....which is usually paired with an 8hp gasser.......just how does $900 compare to a quality (like honda) gasser?
And for the 11-13 gpm splitters, which are usually paired with a 5 or 6 HP gasser......just how does $500-$800 compare?
And is the slight increase in price, worth it to be able to split indoors and no fume yourself out, operate the splitter for alot less money, and not have to worry about maintenance issues associated with the gasser? Like oil changes, and carb issues associated with ethanol. Simply plug it in and know that it is gonna work.