mike93lx
ALLIANCE MEMBER
Wait til you hear the truth about santaAre you telling me that my 5HP 120V Shop Vac isn't really 5 HP and I've been duped???
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Relationship Between Air Compressor Motor HP and Pump HP
- Thread starter jwest7788
- Start date
The clue to the exaggerated hp on the label is the "SPL" designation listed after the 3. This means that the motor rating is "peak hp", which is a useless marketing ploy to make people think they are getting something they are not.You can't get 3hp in a 120v 20a circuit. Any motor claiming to make that power on 120v is shenanigans
thewopperchop
Member
- Joined
- Jul 17, 2024
- Messages
- 5
You and everyone else commenting have been really awesome, I read one of the earlier comments and figured out what I have to do to get the right rpm. My next step will be to find the right size pulleys. What’s the play on sizing? Plus or minus 1/2?The Vevor motor that you linked would be a good match to that Vevor compressor pump. Your next step will be to ensure that the pulleys are correct to get the right pump rpm.
mike93lx
ALLIANCE MEMBER
Its all about rpm. There are online calculators that can tell you pump speed based on motor speed and pulley sizing. You need the right power and speed at the pump for it to work properlyYou and everyone else commenting have been really awesome, I read one of the earlier comments and figured out what I have to do to get the right rpm. My next step will be to find the right size pulleys. What’s the play on sizing? Plus or minus 1/2?
thewopperchop
Member
- Joined
- Jul 17, 2024
- Messages
- 5
Yes I found a calculator someone earlier in the thread linked to a website. Thanks! I’m gonna do some research to try and find out how finicky and exact the pulley size has to be. Appreciate you!Its all about rpm. There are online calculators that can tell you pump speed based on motor speed and pulley sizing. You need the right power and speed at the pump for it to work properly
In my mind you have a couple of things that you can use to make things work. You have to monitor the amp draw of the motor and make sure that you are not overloading it. If you are drawing to many amps then you can slow the pump speed down with your pulley ratios, or set your cutout pressure lower so that it stops pumping before the motor is overloaded. Have you studied the Kellogg chart I linked to up above and understand the correlation between pressure, pump speed and horsepower? It will help you understand.Yes I found a calculator someone earlier in the thread linked to a website. Thanks! I’m gonna do some research to try and find out how finicky and exact the pulley size has to be. Appreciate you!
lg
no neat sig line