Delta 36-725 Table Saw Arbor runout and bearing noise?

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Forum topic by Pmh30097 posted 10-06-2014 09:44 AM 4001 views 0 times favorited 12 replies Add to Favorites Watch
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16 posts in 1296 days

10-06-2014 09:44 AM

Topic tags/keywords: detla table saw 36-725 arbor runout tablesaw question

I just picked up a Delta 36-725 Table Saw. It is a second-hand purchase, so I have no expectation of warranty coverage. Surprisingly, it was still in the box, but once assembled (rather, reassembled), it was apparent that it had been used and somewhat abused. For example, the (not original) blade had heavy scorch marks and melted vinyl from what I guess was ramming thick sheets of MDF/Melamine board through it. The blade was not parallel to the miter slot, nor was the miter gauge or fence. The real red flag was the thermal protection circuit had been tripped. The saw would not start at first – I had to reset the protection circuit. Caveat emptor, so they say.

Anyway, it has been reassembled (the split rail is a pain… I’m considering fabricating my own from steel angle), cleaned up, lubed with dry-film lube per the manual, aligned per Delta tech-support instructions and appears good to go. Cuts are generally very clean and smooth, and the motor does not bog at all through hardwoods. I’m happy, except for two things – the arbor seems to have some runout and causing my diablo 40T blade to wobble a little, and the motor makes an unusual noise when running (load or no-load).

So, I’m asking the folks here with one, what does your saw sound like? does it quietly “whoosh” as the blade spins, or is there a slight hum? Or is there a little more, like a light grrrrrrrr? Descriptive, I know. I’ll try a youtube link, but forgive me if it doesn’t work…


How about arbor runout issues? And what kind of tweaks in general have you made to make your saw better?

Thanks! Marshall

12 replies so far

View Woodknack's profile


11469 posts in 2342 days

#1 posted 10-07-2014 04:48 AM

View Pmh30097's profile


16 posts in 1296 days

#2 posted 10-07-2014 10:44 AM

Let’s try again. I’ve edited the original, and here’s the link too:


View levan's profile


472 posts in 2941 days

#3 posted 10-07-2014 01:09 PM

The video is private

-- "If you think you can do a thing or think you can't do a thing, you're right". Henry Ford

View Pmh30097's profile


16 posts in 1296 days

#4 posted 10-07-2014 02:14 PM

Ok, one more time…

View WhyMe's profile


1007 posts in 1523 days

#5 posted 10-07-2014 02:55 PM

You definitely have a problem with the saw. Mine is fairly quiet without the blade. And with the blade makes nowhere near the noise your saw does. Sounds like a bad bearing on the blade arbor. Or something is rubbing some where.

Another thought is the blade brake is messed up, but my gut says bad blade arbor bearing. Disconnect the belt from the motor and spin the arbor by hand to check for roughness or if it has any play in it.

View Pmh30097's profile


16 posts in 1296 days

#6 posted 10-10-2014 01:26 AM

Not sure how to get at the belt on this saw, seems to be hidden pretty well. Has anyone figured out how to gain access to it?


View WhyMe's profile


1007 posts in 1523 days

#7 posted 10-10-2014 01:14 PM

Unfortunately I believe the motor and blade arbor is housed as one unit so you’d need to remove the whole motor assembly to get to the belt. Looks like it would be a pain. Here’s the parts diagram.

View Rayne's profile


826 posts in 1501 days

#8 posted 10-10-2014 02:33 PM

I agree with Why Me. Mine doesn’t sound like that at all and is fairly quiet. I don’t think the arbor is supposed to stop that fast as well.

View Bill White's profile

Bill White

4898 posts in 3922 days

#9 posted 10-10-2014 03:12 PM

Sounds like somethin’ is rubbing. Have you checked the fan (if it is a TEFC motor) to see if a vane or two is bent?


View Pmh30097's profile


16 posts in 1296 days

#10 posted 10-15-2014 01:42 AM

Thanks all for the suggestions. I’ll try to get at the housing for te motor when I can, I’ll report back what I find.


View Bega_ilidza's profile


1 post in 305 days

#11 posted 06-17-2017 11:42 AM

Hi there
Have you ever solved this?

View cowdough's profile


8 posts in 936 days

#12 posted 12-02-2017 05:44 AM

I have the same Delta saw. It worked great for about a month. Now its switched to 240 and it makes a gawd awful screeeech when you start it. It sounds like the belt slipping to me cause it also bogs down really really easily. I crawled under it and I found that the plastic fan thing rotates around the shaft when you spin it. There’s a cork washerbin there that seems to squeak when youbturn the assembly.

-- JC

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