Bearing question

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Forum topic by Bothus posted 09-21-2009 10:57 PM 915 views 0 times favorited 11 replies Add to Favorites Watch
View Bothus's profile


432 posts in 2220 days

09-21-2009 10:57 PM

I have decided to replace the bearings in my Unisaw 3hp motor. Is there anyway to find out what bearings I will need to buy without taking it apart first?

Motor label

Or maybe I should take it about first to make sure there isn’t anything else that needs replacing?

Let me know your thoughts.


-- Jerry Boshear, Professional Kitchen Designer, amature woodworker.

11 replies so far

View GMman's profile


3902 posts in 2741 days

#1 posted 09-21-2009 11:13 PM

I would take it off 1st ,you will have to remove it anyway!!!

View Kent Shepherd's profile

Kent Shepherd

2701 posts in 2330 days

#2 posted 09-21-2009 11:35 PM

I prefer to buy my bearings from my local bearing place. Then you have to remove them first. I’ve had horrible luck getting bearings from manufacturers. They keep changing things, and don’t seem to know what they have done. I own a $60,000 sander from SCMI. We ordered bearings from their manual, with their part #
They were totally wrong, SCMI admiited their manual was wrong, but refused to exchange the bearings because, get this—-It is their policy to not accept returns on bearings!
I guess you see why I would remove the bearings first.

-- She thought I hung the moon--now she just thinks I did it wrong

View SCOTSMAN's profile


5782 posts in 2629 days

#3 posted 09-21-2009 11:41 PM

Why are you replacing them? you don’t say.I think you will find that the manufacturers will be able to sell or tell you which bearings to use.However you may well find good old USA bearing company will do better pricewise and quality wise also.Please don’t skimp on bearings don’t buy Chinese unless you have no option ( which I don’t believe) and get it up and running sweet as new again and have fun.Alistair ps perhaps sealed for life bearings of the right design are bestAlistair

-- excuse my typing as I have a form of parkinsons disease

View hairy's profile


2208 posts in 2575 days

#4 posted 09-21-2009 11:42 PM

Most big cities will have a supply house dealing in bearings. They measure them. Bearings are usually standard sizes. They could maybe get the numbers off the old bearing. Inside diameter, outside diameter and depth is normally all you need. Take them with you, they will match them up.This is standard operating procedure.

-- stay thirsty my friends...

View MedicKen's profile


1607 posts in 2506 days

#5 posted 09-22-2009 12:01 AM

If you go to the service net web site you should be able to enter the model number of the motor and get a parts list. However, it will give you the delta replacement number. I would call Accurate Bearing after you remove the bearings and they will be able to cross reference the bearings you have. You can also cross them yourself on their site found here

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

View GMman's profile


3902 posts in 2741 days

#6 posted 09-22-2009 12:15 AM

Kent….can you show me a photo of a $60,000 sander I have never seen one before..

View Bothus's profile


432 posts in 2220 days

#7 posted 09-22-2009 12:35 AM

Thanks to all for the feedback.

GMman, I guess I will have to take the motor apart first. I just don’t want to leave it apart too long. The longer it stays apart the less likely it is to get back together.

Kent, that sounds like good advice. That is strange about SCMI though, I have had to order a few things for our equipment here and they were very good about it. No bearings though.

Scotsman, I am replacing them just to be safe. The saw is 16 years old and I already have the entire thing apart anyway so it won’t be a big deal at this point.

I may go local but I like to buy things online when I know exactly what I want. I only go out to shop.

Ken, based on you earlier suggestion in another post I called Accurate this morning. Being a novice at this I thought they would have some master database and be able to tell me what bearings I needed… they thought I was crazy… but they were very nice about it.

I checked and there is no info on it online. It said I needed to call my local service center.

Have you purchased from I found several things on there to buy for my saw, added them to my shopping cart, entered my CC info hit Submit Order and it just keep bringing me back to the same page. No error message, nothing. I checked every required field and they were populated.

So I called my local service center and placed the order. I should have everything in 5-10 working days. The are only 40 miles away. If I didn’t have to work for a living I’d drive out there and pick them up.

I didn’t ask them about the motor bearings because Kent’s comments above scared me. I’ll take it apart first so I will know what I need.

Thanks again guys.


-- Jerry Boshear, Professional Kitchen Designer, amature woodworker.

View lew's profile


10632 posts in 2799 days

#8 posted 09-22-2009 01:56 AM

As much as I like to do things myself, I would take the motor to a motor repair shop. They have the tools, expertise and if it gets broken- they have to fix it. If the motor is old enough to need the bearings replace, it probably should be checked over for any other possible problems (or soon to be problems)

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View Karson's profile


34987 posts in 3444 days

#9 posted 09-22-2009 02:09 AM

Since the saw is all apart, I’d take the motor apart and get the bearing number. The only thing that I’d suggest is when you take off the end caps watch out for wires and brass springs.

Go for taking it apart yourself.

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware soon moving to Virginia †

View DaneJ's profile


55 posts in 2252 days

#10 posted 09-22-2009 05:02 AM

I agree with Lew, take the motor to the service center…. I like to think I can repair anything, most of the time I do, but sometimes it is just easier to let someone else do what they do best… Typically the endplates are aluminum and pressing the bearings out may damage the endplates unless you have the correct plates, sleeves and press. They can also use the correct solvents and test the electrical parts, “just to be safe”

Just because the bearings are 16 years old does not mean that they need to be replaced do you know what the radial and end play is? more importantly what is the allowable tolerance ;)

-- Dane, Fairview Pk, OH. The large print giveth and the small print taketh away... Tom Waits

View sidestepmcgee's profile


158 posts in 2768 days

#11 posted 09-22-2009 05:24 AM
The only old woodworking machine website your ever need.I just ordered a set of arbor and motor bearings from (talk to lynne) for my 1965 2 HP unisaw,prices are right and nice people.good luck

-- eric post, tallahassee FL

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