well I still haven't found a suitible motor that is less than $100 and the pully's from tsc are not gonna be cheap either. Hoping I can rent this thing out after it's built to recoup costs. I hate building something I can't make money with.
I would suggest using a 1750 rpm motor and a 10-1 reducer instead of doing the pulley thing. Much easier to fabricate and adjust so that it runs correctly.
I got a garbage disposal at one of the Habitat for Humanity Restores for something like $10-$15. My DH was appalled and said you shouldn't use a used disposal because it could be all rusted inside and leak or something. I'll have to dig it out to find the details, but I wonder if it could be made to work.
for the record i have built one and used it 3 times now
3phase motors will NOT work unless you have 3phase power at your home. this is VERY VERY rare. They can be made to work with a phase converter but this adds costs and complexity. if the motor was free you may be able to buy a static phase converter for the price of a new motor, and use it on other equipment especially if you have a shop. NOTE: 3phase wireing is NOT the same as single phase.
in short, avoid 3phase motors.
you REALLY want to get a 1750 Rpm motor. a 3600rpm will NOT work unless you add a jack shaft and second set of pulley's to reduce the rpm down. again while it can be done, it adds cost and complexity. (again if the motor is free, you'd likely be able to build the second pully/jack shaft system for the same price as a new motor)
Off the top of my head a disposal i dont think is a 1750 motor. after that you would have to remove the disposer part and hope you can fit a standard pulley on the end of the motor shaft. then you have to worry about mounting it, because its a purpose built motor, it has no standard mount to mount it to the side of the plucker stand.
10:1 reducers are nice, also known as a "gear motor"
but are expensive, like as much as the motor. so unless you have a free motor, skip it. you can build the standard pulley system (16" large pulley) for less than a gear reducer.
In my research commercial tub puckers run 150-200rpm. much slower than that and they dont spin the birds fast enough to effectively strip feathers in a short time leading to longer plucking times = more chance of damaged chicken. Faster than that and they can go for to fast a ride and again the propensity for bruising/damage is greater.
remember pulley ratio works by takeing the ratio of the pulleys. small one is 1.75 big is 16" 16/1.75 = 9.14 (reduction or speed up depending on which pulley is being driven) 1750/19.5 = 191 rpm toward the top end of the recommended RPM range.
if your wondering what im useing for a motor? its a 1.5hp 1750 i had laying around from another project. the limiting factor for me is belt slip.