Need a new compressor pump to go with 1.5 HP motor
#1
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Need a new compressor pump to go with 1.5 HP motor
I have a 60 gallon tank with a 1.5 HP motor and I need a compressor pump that will work with it.
Harbor Freight has a 3 HP and a 5 HP pump each stating that they require a motor of the same HP (3 or 5 respectively)
Can I get the Harbor Freight 3 HP pump and attach it to the smaller motor? I don't mind sacrificing efficiency. I'm just looking to do minor auto work and fill tires with air occasionally.
Harbor Freight has a 3 HP and a 5 HP pump each stating that they require a motor of the same HP (3 or 5 respectively)
Can I get the Harbor Freight 3 HP pump and attach it to the smaller motor? I don't mind sacrificing efficiency. I'm just looking to do minor auto work and fill tires with air occasionally.
#2
Welcome to the forums.
Typically the stated HP rating is what is needed to run the pump effectively.
Using a smaller than rated motor will cause the motor to be taxed and run hot.
I don't see many choices for a 1.5HP motor. Possibly on ebay.
One possibility
Typically the stated HP rating is what is needed to run the pump effectively.
Using a smaller than rated motor will cause the motor to be taxed and run hot.
I don't see many choices for a 1.5HP motor. Possibly on ebay.
One possibility
#3
There is some flexibility when you select a motor for a certain compressor.
But, you need to check what compressor rpm is required for the motor they specify.
You need to go further than a stated HP when matching a motor to a pump.
You need to look at the performance chart for each pump and you may have to replace the motor pulley to reduce the pump speed.
Also, the specs should tell you what the minimum and maximum rpm is for any pump.
But, you need to check what compressor rpm is required for the motor they specify.
You need to go further than a stated HP when matching a motor to a pump.
You need to look at the performance chart for each pump and you may have to replace the motor pulley to reduce the pump speed.
Also, the specs should tell you what the minimum and maximum rpm is for any pump.
marksr
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Thanks for your welcome to the forum and kind replies to my problem!
I guess I should provide some more information:
I don't have any specs on the motor... Got it and the tank used and it's an older motor.
Would I be better off getting a new motor along with the new pump? I would still have to research HP and rpm but I would have clear specs available on each of the new units.
Unless there is a way to calculate the RPM speed of the motor??
I don't have any specs on the motor... Got it and the tank used and it's an older motor.
Would I be better off getting a new motor along with the new pump? I would still have to research HP and rpm but I would have clear specs available on each of the new units.
Unless there is a way to calculate the RPM speed of the motor??
#5
The speed of the motor would either be 1725 or 3600 rpm.
1725 rpm motors are used more on commercial applications and are quite a bit more heavy duty, but are more expensive.
Because there is a bit of trial and error when putting together an air compressor this would be the time to bite the bullet and buy a quality name brand init.
1725 rpm motors are used more on commercial applications and are quite a bit more heavy duty, but are more expensive.
Because there is a bit of trial and error when putting together an air compressor this would be the time to bite the bullet and buy a quality name brand init.
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So "bite the bullet for a quality name brand unit" means
buying a complete unit with tank motor and pump?
or are you saying buy a new motor and a new pump and attach it to my tank?
I guess I was trying to use what I had in my possession since the tank is still good (although it is old)
but maybe the work involved in finding a pump and motor is challenging enough that buying a complete unit would be easier... although potentially more expensive?
or are you saying buy a new motor and a new pump and attach it to my tank?
I guess I was trying to use what I had in my possession since the tank is still good (although it is old)
but maybe the work involved in finding a pump and motor is challenging enough that buying a complete unit would be easier... although potentially more expensive?
#8
The problem is a new motor and pump will more than likely cost you more than buying a new complete unit..... including the tank.
I bought a Sanborn 30 gallon 3 hp compressor on wheels for $400...... new.
I would not hesitate to buy a used compressor setup. I see them everywhere.
If you're on Facebook.... check in on marketplace where you can see goods within a certain mileage of your location.
I bought a Sanborn 30 gallon 3 hp compressor on wheels for $400...... new.
I would not hesitate to buy a used compressor setup. I see them everywhere.
If you're on Facebook.... check in on marketplace where you can see goods within a certain mileage of your location.
#9
I am sure you would save money but you would need to be prepared to work on it after its put together to make it work properly
It will definately not be bolt up and go!.
Harbor Freight prices are pretty good for components but you need to be careful when matching motor to pump.
You can't really match the advertised HP ratings of the motor and pump.
You need to ignore that and be concerned about motor amperage and the hp/cfm rating of the pump.
There may be some exceptions but generally the maximum CFM @ 100 psi you can operate on a 120 volt 15 amp cct is 6.
10 cfm @ 100 psi would struggle on a 20 amp 120 volt cct.
It will definately not be bolt up and go!.
Harbor Freight prices are pretty good for components but you need to be careful when matching motor to pump.
You can't really match the advertised HP ratings of the motor and pump.
You need to ignore that and be concerned about motor amperage and the hp/cfm rating of the pump.
There may be some exceptions but generally the maximum CFM @ 100 psi you can operate on a 120 volt 15 amp cct is 6.
10 cfm @ 100 psi would struggle on a 20 amp 120 volt cct.