Surpluscenter.com for motor purchase

[kevs79]

Anyone have any experience with them? They seem to have good prices on a motor for my compressor.

 

[LXCam]

Yup, I've bought a lot of stuff thru the years from them. No worries. But I would point out all they do is sell stuff so your choice of motor is dependent upon you choosing properly.

 

[kevs79]

I have a Quincy 310 that calls for. 1-3hp motor. They have at "3hp" Marathon 12.5 amp and a "5hp" that is 19.6 amp. I am leaning towards the 19.6 amp since it's only 30.00 more. From what I can tell it would be a 2.5 vs 4.0 HP based on the amps.

 

[LXCam]

Well you need to take the frame of the motor into consideration. You might run into an issue with going to the larger motor not fitting, and then again you might not. But check all the info and make certain it'll fit first. As far as the Marathon brand I've seen them before but I don't have any information for you. I'd suggest searching Amazons review of those if they exist. Amazon seems to be about the only legit source of real opinions anymore other than forums.

Also are you using a magstarter for the motor operation now and if so make certain its rated for the larger HP. At a minimum if it is you'll need larger heaters for it.

I should also add that if you don't have a magstarter and are using the pressure switch for activation to confirm its rated for the HP you plan on using.

 

[454ragtop]

If the 3 HP was the correct shaft size and RPM, I'd probably go with that one, since the pump is rated to use as small as 1 HP. But maybe you like killing flies with a sledge hammer........

 

[jfcasey]

I have not personally but a coworker has ordered a whole ton of stuff from them without issue.

Sent from my SM-G935V using Tapatalk

 

[The Tool Tyrant]

It's preferable to use a 1725-1750 rpm motor over 3450 +/- rpm motor so you don't have to utilize such a small drive pulley to achieve your desired rpm, which can cause the drive pulley to lose sufficient contact with the drive belt creating slippage. That scenario may cause you to overtighten the belt creating an overload on the motor and pump bearings.
The Quincy 310 pump has a minimum rpm of 400 (1HP) to a max of 920 (3HP). The 310 has a pulley diameter of 14", so say you want to be on the safe side and run the pump @ 900 rpm, you would need a 7.3" drive pulley with a 1725 rpm motor vs. a 3.7" with a 3450 rpm motor. Except for the Quincy (branded) compressors you can buy at the big box stores, you won't find a 3450 rpm motor driving a OEM Quincy compressor.
The minimum 'Arc Of Contact' between the drive belt and pulley is 120°. Here is a link to a article regarding 'Arc of Contact & Avoiding Slippage'... http://web.fscj.edu/Mark.Bowman/handouts/Arc Of Contact.pdf

BTW, since the pump is rated 1-3 HP, there is no need or benefit from using a 5 HP motor...kind'a like putting an LS-3 in a golf cart...not saying it's wrong...just overkill!

 

[B_Bimmer]

I love overkill. I also have bought many things from surplus center. Zero complaints, just wish I lived closer to their warehouse/showroom. Shipping takes the fun out of big cheap things.

 

[kevs79]

Great input from everyone so far...thanks! I agree that a 1725 rpm motor would be best just they jump in price pretty good to get one vs. the 3450 rpm ones. I do think a 3hp will be sufficient. Still looking around for a decent priced 1725 rpm one.

 

[454ragtop]

Where are you located? I have a motor, probably not worth shipping.

 

[kevs79]

Where are you located? I have a motor, probably not worth shipping.

Kansas City