Can I upgrade the motor in my table saw? Should I?

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Forum topic by mustangdad posted 02-04-2010 07:15 AM 4688 views 0 times favorited 6 replies Add to Favorites Watch
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1 post in 2455 days

02-04-2010 07:15 AM

Topic tags/keywords: motor upgrade question tablesaw

OK, heres the deal. I have a nice used Jet table saw. Like I said nice, but only 1.5HP single phase. The woodworking caveman in me would like to put in a 3HP 220v single phase in place of the 1.5HP. There are some pretty good deals out there and it would be a lot cheaper than a new saw. I’ve also built this saw into a mobile work center and I really don’t want to rebuild that whole project. My question….can I or should I do this? Are there limitations of the saw itself that I’m not considering here? And, would this be foolhardy and unsafe? Any advice would be greatly appreciated.

6 replies so far

View a1Jim's profile


115177 posts in 2999 days

#1 posted 02-04-2010 07:21 AM

I would wonder about it’s specs and if the added Hp could effect how well it will hold up. If it fails your in the saw boat of starting over again.

-- Custom furniture

View JAGWAH's profile


929 posts in 2505 days

#2 posted 02-04-2010 07:32 AM

Years ago, long ago, my first table saw was a Montgomery wards. The motor was a light weight that kept tripping the reset. I got the mail order store manager to let me look at the parts schematics for the 10” saw I had verses the 12” tablesaw I could of had, both direct drive.

I found all the parts, trunion, gears,and motor mounting to be the same. The only thing difference was the motors had different amp ratings and ordering serial numbers. So I ordered the 12” saw motor. I felt comfortable I wasn’t going to do anything different to all my gears and such since they were all the same.

The motor mounted with no trouble and ran way better. Never tripped the reset. I had that saw for another 5 years.

It may not matter with the way your motor mounts switching themotor. But I bet if you checked into the parts numbers of the saw and found the parts different it might matter. Stronger motor spinning the same rpm will have higher torque and that might matter.

-- ~Just A Guy With A Hammer~

View knotscott's profile


7146 posts in 2797 days

#3 posted 02-04-2010 07:37 AM

I would not suggest going over 2hp on a saw built and designed to handle a 1.5hp motor. The weight and torque difference could cause problems for bearings, pulleys, and stress points. Good alignment, and proper saw blade selection can make a huge difference without swapping motors.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

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7146 posts in 2797 days

#4 posted 02-05-2010 02:12 PM

So what’s the verdict MD?

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View b2rtch's profile


4822 posts in 2470 days

#5 posted 02-05-2010 03:36 PM

Did you ask Jet?
If the motor has the same base configuration you should have no issue mounting it on the base, that does not mean that it will fit in the cavity being much bigger that the motor it replaces.
I would ask Jet .
Also I would check the classified to find a replacement saw.
My experience is that when you start modifying a piece of equipment it never ends and at the end it is often cheaper to buy “new” that to modify.
In addition a modified piece of equipment seems to never be quite right.
On this website in the review there is review about the Harbor Freight cabinet saw for about $500.00.
I would look at it seriously instead of modifying my existing saw.
How much can you sale this saw for?
How much a 3HP motor cost?
It might be more cost effective to buy the HF saw and you will have a saw designed for the power and I understand a pretty good saw at a very good price. In addition you can find a 20% rebate for it.

-- Bert

View JAGWAH's profile


929 posts in 2505 days

#6 posted 02-05-2010 04:40 PM

Interesting design on Jet saws. While googling specs twixt the 1 1/2hp and 1 3/4hp saws they showed no order number difference between motors, they appear to be the same.

The motor mounting is different than I thought it would be. While not direct drive, it’s short belted within the housing like the pro based model.

There are different order numbers on the trunions but bearings seem to be the same. Anyway if it were me I’d go to a store that sells both models and do a serious lookylou.

-- ~Just A Guy With A Hammer~

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