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Forum topic by lieutenantdan posted 898 days ago 3215 views 0 times favorited 11 replies Add to Favorites Watch
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lieutenantdan

176 posts in 932 days


898 days ago

OK. I am seeing a lot of high quality Powermatic 66’s out there on CL from about $800 to $1100 greenbacks. The problem is that they are all 3-phase. What would be my out-of-pocket cost to change one of these over to single phase?? Is it even doable?? Is “doable” really a word??

-- "Of all the things I have lost in life, I miss my mind the most."


11 replies so far

View rustfever's profile

rustfever

621 posts in 1937 days


#1 posted 898 days ago

Would require a replacement 220v-5 hp (or 3 hp) electric motor, plus new switches and power cords. Try Grainger or maybe you have locally, a good electric motor supply house.

BTW, the 5 hp will cut circles around a 3 hp model!

-- Rustfever, Central California

View SnowyRiver's profile

SnowyRiver

51451 posts in 2107 days


#2 posted 898 days ago

You could also use a phase converter. I am not sure just how much they cost, but probably a couple hundred dollars.

-- Wayne - Plymouth MN

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Julian

503 posts in 1317 days


#3 posted 898 days ago

It is doable but will cost money. You could also buy a phase converter but those aren’t cheap either. My opinion; stay with single phase unless you can get a really low price on the TS to offset your other costs.

-- Julian

View Loren's profile (online now)

Loren

7398 posts in 2274 days


#4 posted 898 days ago

You can do it. Will cost you. I recommend just putting in
a new single phase motor rather than getting into phase
conversion.

Offer less for the saws.

There’s a glut. Sellers with 3 phase cabinet saws for sale
are in no position to charge premium prices.

Make some offers.

-- http://lawoodworking.com

View MedicKen's profile

MedicKen

1599 posts in 2089 days


#5 posted 898 days ago

The cost will depend on how you want the conversion to go. You can buy a single phase motor of equal HP or I prefer to get a VFD which will convert single phase to 3ph for about 1/3 the cost of a new single phase motor. VFD’s are a little pricey when you start pushing the 5hp mark. If the saw you are looking at is 3hp or under the most cost effective solution is a VFD. I have several machines running from VFD’s and love them all. The largest is my table saw which is 3hp and I want to say the VFD cost was under $200. You will still need 220V available in the shop for the VFD.

-- My job is to give my kids things to discuss with their therapist....medic20447@gmail.com

View jcox's profile

jcox

17 posts in 877 days


#6 posted 853 days ago

Jumping in on this because I’m also looking to replace a 3 phase motor but I have some basic questions that I haven’t been able to figure out reading through forums on this site and others…If you are buying a replacement motor for the Powermatic 66, is the C face mount the crucial part of the motor to allow it to be compatible or does it also have to be the same frame type? For example, if I want to replace a 5hp, 3 phase pm 66 motor (184 C) with a single phase, do I need to have another 184C motor or could I use a 145C (I am looking at 3hp motors because that is all I will really need and the 5hp look to be much more expensive). I keep seeing people say that they’ve bought replacement motors for $300-$400, but I don’t see anything in that range unless the 145C would work. Also, does the fact that it is a totally enclosed fan cooled motor matter?

E.g., would this motor work?

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Arch_E

47 posts in 1149 days


#7 posted 853 days ago

This is exactly how I got into my PM66: bought a 3phase and converted it. However, the expense of doing so nearly became unreasonable. A converter new was about a grand; a 5hp motor, single phase, about $800, or a digital “somethingmacallit” was only $300 but it tricked single phase and could damage the motor. So, I bought a Marathon 3hp single phase for just under $300 and made the switch. So far, it handles everything—but I’m a hobby ww so my demands are probably not that great. Be very careful about matching the motor mounts; and you’ll have to pull the 7/8” shaft and exchange on the new motor. Glad I had a friend who had the tools and new his business. This is not for the unskilled and faint of heart. Good news, though, mine works fabulously now!

View Lee Barker's profile

Lee Barker

2163 posts in 1477 days


#8 posted 853 days ago

Here it is, and free shipping:

Kindly,

Lee

-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

View Rob186's profile

Rob186

23 posts in 961 days


#9 posted 852 days ago

I have a static phase converer on my 5 hp saw you loose 1/3 of the power but was the converter Was under 100 bucks it took me about an hour to wire it up the older powermatic saws are beasts and worth every penny look at the trunions and tilt screws they are the only parts that can break

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Rob186

23 posts in 961 days


#10 posted 852 days ago

Jcox the numbers that you are listing are the frame numbers and you should really buy the same frame that way the bolt patterns are the same all the powermatic saws I have seen mount by bolts into the shaft end of the motor with 3 -4 bolts that means that the pattern is important also. Make sure rotation is the same as well as rpm

View mcase's profile

mcase

438 posts in 1756 days


#11 posted 852 days ago

Buying a phase converter to power an old, very used motor does not make sense. Say you buy the converter and the used motor dies? Ouch! that would hurt. Lee provided a link to just the motor you want. IMO the Baldor was the best thing about the 66. That’s where I would spend my money. Offer less for the saws as Loren says.

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