Arbor rotating with nut when trying to change blade

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Forum topic by Vrtigo1 posted 02-02-2011 04:50 AM 1727 views 0 times favorited 4 replies Add to Favorites Watch
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434 posts in 3225 days

02-02-2011 04:50 AM

My Unisaw just started having a problem that has me scratching my head. I was working on a project and was about to remove a stacked dado set and switch back to a combination blade, but when I tried to loosen the arbor nut, it just kept turning and didn’t get any looser. I took a sharpie and marked the arbor at top dead center and then tried to loosen the nut about half a turn, and sure enough the mark I’d made was now at the bottom of the arbor, so the arbor was spinning with the nut.

I looked at the arbor, and there’s a spot to the right of the blade where you can slip a second wrench on it to keep it from spinning while you loosen the nut. I bought my saw second-hand and didn’t get any wrenches with it. I’ve always used a crescent wrench and a piece of scrap wood wedged between the table and the blade to keep the blade and arbor from spinning while removing the nut.

I was able to use a collet wrench to get the nut loose, but that got me thinking that I should probably invest in a proper wrench. The model of my saw is 36-829, and I have done some research online, but there is no diagram or parts list on Delta’s service website.

Can anyone tell me the part number for the wrench I need, or if wrenches from newer model saws are interchangeable?

4 replies so far

View patron's profile


13641 posts in 3574 days

#1 posted 02-02-2011 05:05 AM

mine is 7/8” open end
stamped from 1/8” steel

worst case
grind/sand down (sides)
an open end wrench
to fit the slots

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View Marlow's profile


179 posts in 2904 days

#2 posted 02-02-2011 05:20 AM

View Rick  Dennington's profile

Rick Dennington

6341 posts in 3428 days

#3 posted 02-02-2011 06:16 AM

Greetings Vrtigo1,

You didn’t say how old your Unisaw is, but probably doesn’t matter…..I have a 2009 Uni X5, and it takes 2 wrenches… bent to fit behind the arbor, and a straight one for the nut… The link that is posted above by Marlow is the ones you need…..I’m surprized you didn’t get those when you bought the saw….get those, and you’ll be good to go…..also check the belts to make sure they are tight and not slipping…..if you try to remove the blade with a board and wrench, you might bust a tooth(s) off the blade…it happened to me….

-- " At my age, happy hour is a crap and a nap".....!!

View Cosmicsniper's profile


2202 posts in 3392 days

#4 posted 02-02-2011 06:20 AM

I had the same problem when I bought my used Unisaw. I did exactly what David suggested…took an open end, 7/8” wrench and thinned it with my grinder. Works like a charm.

-- jay,

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