Old unisaw question.

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Forum topic by alittleoff posted 09-24-2015 01:47 PM 820 views 1 time favorited 6 replies Add to Favorites Watch
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385 posts in 879 days

09-24-2015 01:47 PM

Can anyone tell me where to get the best deal on a vfd for a 3ph, 3 hp. Motor. I have an old 3 ph. Unisaw I’m trying to restore and don’t have 3 ph. Power in my shop. I figure someone here has done this and maybe could tell me which one to use. The motor runs to good to change it out, and replacing it would be rather expensive. I’ve found a couple of drives that I think would work, but don’t know about the quality of them. I don’t need the most expensive but just want a good stable drive. Thanks in advance.

6 replies so far

View SirIrb's profile


1239 posts in 833 days

#1 posted 09-24-2015 01:58 PM

I would shop CL for it. What year Uni do you have?

-- Don't blame me, I voted for no one.

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4121 posts in 1324 days

#2 posted 09-24-2015 02:34 PM

I’ve had good luck with Automation Direct, they offer an ok product (great for the money) and of those I’ve had to send back or have fixed, most if not all were the result of a malfunction not related to the drive itself. This one would work for your application: They’re no Allen Bradley, but they don’t have the price tag either and they now carry a two year warranty.

View MrUnix's profile


5080 posts in 1802 days

#3 posted 09-24-2015 04:01 PM

What is the current rating on the motor? If it’s the 3hp Baldor from around that period (which is rated at 7.4A), you can get a FM50-202 for well under $200.


-- Brad in FL - To be old and wise, you must first be young and stupid

View Bluepine38's profile


3360 posts in 2688 days

#4 posted 09-24-2015 04:59 PM

MedicKen used the Teco FM50 on his tablesaw and recommended it. It is made by Westinghouse and
is available through several scources. Use google to get the best price for your area.

-- As ever, Gus-the 78 yr young apprentice carpenter

View alittleoff's profile


385 posts in 879 days

#5 posted 09-25-2015 02:35 AM

Thanks for the info guys. Looking at all three deciding which way to go.
Thanks Gerald

View MedicKen's profile


1610 posts in 3065 days

#6 posted 09-25-2015 10:38 AM

TECO FM50-203C

-- My job is to give my kids things to discuss with their

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