Do you have the ace link to the motor that you bought?
I didnt buy it online, i walked in the store and got it, but let me look online and i can pick out the one i have, ill post a link for you. Its basically just a industrial 120V AC motor like you see on alot of old bench grinders, belt driven ac compressors and things like that....The Dayton and GE brand's are some of the better ones out there and last a very long time, 1 phase motors will work just fine for tire machines, but if you can find a 3 phase motor cheap, they are the best ones to use from what i have seen, and are more reliable when it comes to the brushes and internal parts not failing. Look for one that is reversible, that means you can spin the shaft either direction when working on tires. With mine, i just flip a switch to turn it on, then spin the tire whichever way i want it to spin and go to work. I like to resurface them with the tire spinning away from me rather than towards me, it leaves a better finish that way and doesnt require as many passes to resurface the tire, usually 2 passes and im done, sometimes just one is all it takes.
Edit: I looked at the Ace online website and they dont even have electric motors listed on the website for some reason, my local store had several to choose from, 1/4hp up to 3hp. The one i got is a Dayton brand 1/4hp motor, and the shaft can be spun either direction although im not sure what the correct term for that is but i know there is something they call that. Im not too knowledgable on electric motors. I looked around online and found one that looks like mine, but is a little higher price wise, different brand also. The one i got were designed to be used as blower motor's for a furnace/stove, so you can usually find them on old stoves and stuff like that which have an electric blower on them, i have seen several at the local junkyard here.
Here is one like what im talking about, that i found online....http://www.zoro.com/ametek-lamb-uni...gclid=CIjJ0Z6xicYCFQGnaQodYnIAuA&gclsrc=aw.ds
Another one- http://www.ebay.com/itm/GE-1-4-HP-3-phase-electric-motor-N-O-S-/141684213066