Table Saw motor to swap

[techedmaster]

I purchased a powermatic model 66 table saw at county auction and can't use it since it has a 3 phase motor. I'd love to find someone who will swap a single phase 3 HP motor that has a 56-9 frame and a 7/8" dia shaft. for my 3phase motor with the same configuations listed above. The Marathon 3 phase motor I have has low use and is a typically enclosed table saw motor (Original equipment) I'd like to find a single phase with this large shaft diameter since I have the triple belt drive pulley to fit. If I can find a triple belt 5/8" pulley to go with a 2 or 3HP motor with a 56 frame that fits the powermatic mounting bracket, I'd take that too!
Photos are attached

 

[A_Pmech]

Welcome!

Why not build a phase converter?

Then, you won't run into this problem again. There will be a next time, trust me. Machines have a habit of "showing up".

 

[rsanter]

I did that swap on a unisaw and it can get expensive. most people do not want the 3ph motor much less want to trade you. I still have the 3ph unisaw motor and would love to find a buyer

with a regular phase converter you will loose about 1/3 of the rated power. with a VFD you will loose 5% or less of the rated power
look for a VFD on ebay and get a deal. that is about the cheapest option you can find

bob

 

[A_Pmech]

I did that swap on a unisaw and it can get expensive. most people do not want the 3ph motor much less want to trade you. I still have the 3ph unisaw motor and would love to find a buyer

with a regular phase converter you will loose about 1/3 of the rated power. with a VFD you will loose 5% or less of the rated power
look for a VFD on ebay and get a deal. that is about the cheapest option you can find

bob

Bob, with a static phase converter you'll lose 1/3rd of the motor rating. With a rotary converter you lose nearly nothing if it is properly balanced. You shouldn't lose any of the motor rating with a VFD. The new ones provide better balanced and cleaner power that what comes off the power lines.

A VFD might be the way to go for a single application like this. It would have to be installed in a fairly good sized environmentally sealed Hoffman box though, to prevent dust from entering the VFD enclosure. The Hitachi vector drive VFD's I've used have motor protection, emergency stop, start / stop, reverse lockout, etc. built into the package. VERY cool to work with.

I'd definitely go one of the two routes before I installed a single-phase motor.