I can't take my miter saw blade off

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Forum topic by BentheViking posted 12-06-2012 09:53 PM 46126 views 0 times favorited 39 replies Add to Favorites Watch
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1782 posts in 3850 days

12-06-2012 09:53 PM

So at work we have a miter saw that is approx 13-14 months old and gets pretty regular use (50 or so cuts a week). Finally decided today that we should change the blade for the first time. Problem is that I can’t get the bolt loose. Bolt is circular on the outside with a hex insert. I’ve got the original manual and allen keys and it says press the motor lock button and turn clockwise. I do all that and with all my might the bolt doesn’t budge. I put a little air tool oil on it, but it really didn’t work too well. Gonna try to use some WD40 tomorrow to free it up, but I was wondering if anyone else had any suggestions. Thanks!

-- It's made of wood. Real sturdy.--Chubbs Peterson

39 replies so far

View Kreegan's profile


1452 posts in 3433 days

#1 posted 12-06-2012 10:06 PM

Does the blade move when you push the motor lock? If not and it’s just that the bolt is frozen, some WD-40 should help. One weird thing I’ve done to unfreeze stuck bolts is pour some coke on it. Perhaps some of that blade cleaner stuff they sell at Rockler.


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David Craig

2137 posts in 4395 days

#2 posted 12-06-2012 10:09 PM

This is going to make me sound like an ass so please do not interpret this as an attempt to do so. Righty tighty – Lefty Loosey is so engrained in me that it took me a few minutes to understand that clockwise means to turn the bolt like I am tightening it. The first time I changed my miter saw blade, I kept trying to loosen the bolt the traditional way. Even though I read the instructions. Once I really started loosening it by turning clockwise, it came off with no problem.

-- There is little that is simple when it comes to making a simple box.

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2202 posts in 4445 days

#3 posted 12-06-2012 10:21 PM

Maybe the miter saw is disposable? Ever thought of that? Hmm?


-- jay,

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1782 posts in 3850 days

#4 posted 12-06-2012 10:21 PM

David I totally understand your trying to help. But yes I did try turning it clockwise (assuming clockwise when you are facing the blade) and when that didn’t free it I tried going the other way to no avail.

Rich do you mean coca cola? That seems super counterintuitive. I could understand if your trying to do a bolt on something you don’t care about, but on a saw that you don’t own feel like even if it did free it up it would ultimately gum up, no?

-- It's made of wood. Real sturdy.--Chubbs Peterson

View a1Jim's profile


118297 posts in 4864 days

#5 posted 12-06-2012 10:24 PM

This might take three hands,use a tight fitting box wrench and tap the end of the wrench with a hammer or carvers mallet to move in the loosening direction.Sorry for repeating the same theme but turning the bolt clock wise sounds like tightening?


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1782 posts in 3850 days

#6 posted 12-06-2012 10:40 PM

I tried doing that best I could. Unfortunately it is a round bolt on the outside so there is nothing for the box wrench to fit onto. The inner part of the bolt is a hex which if you start pounding on it torques a bit in the spot and feels like its starting to slip and round out the inside of the bolt

-- It's made of wood. Real sturdy.--Chubbs Peterson

View RussellAP's profile


3105 posts in 3573 days

#7 posted 12-06-2012 10:46 PM

A small torch with a pin flame can heat it enough to loosen it. You don’t need to turn it red so no oxi/Ac. One of those hand held will do nicely. Cut the flame way down and dont melt anything.
Sounds like my DeWalt. That star wrench fit in the middle of the nut that holds the blade and you cant get enough torque from the center as you can with a box wrench.

-- A positive attitude will take you much further than positive thinking ever will.

View JoeinGa's profile


7741 posts in 3293 days

#8 posted 12-06-2012 10:55 PM

Try an impact socket driver with the correct size hex in it. Tap, tap, tap it with a hammer as you turn it with your other hand.

-- Perform A Random Act Of Kindness Today ... Pay It Forward

View bandit571's profile


30069 posts in 3970 days

#9 posted 12-06-2012 11:00 PM

I tried two visegrips on a miter I once had. one on the blade set so the blade wouldn’t move. Second one on the bolt, with enough room to smack the visegrip with a ball pean hammer. Tried each way, when the bolt started to move, no more smacking the pliers. Find a good flat or two on the bolt head to lock onto. Straight jaw visegrips work better.

-- A Planer? I'M the planer, this is what I use

View teejk's profile


1215 posts in 3971 days

#10 posted 12-06-2012 11:17 PM

You don’t mention the brand. I do think that most stationery saws are “reverse thread” (in fact I think that question is what caused me to find this site in trying to change a blade on a Dewalt). If I’m correct, you have managed to tighten it quite well!

scrap block of wood to catch the teeth and then try going the other way. HD sells sets of both hex and TORX sockets in both SAE and metric sizes that fit a 3/8” ratchet (a hell of a lot easier than dealing with those little wrenches you get).

View patcollins's profile


1687 posts in 4152 days

#11 posted 12-06-2012 11:22 PM

My miter saw had a left hand threaded screw on it.

View dhazelton's profile


2839 posts in 3583 days

#12 posted 12-06-2012 11:22 PM

Normally a saw arbor nut or bolt tightens the way the blade spins, so it can’t loosen while in operation. Look at blade direction and go the opposite way to loosen it.

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404 - Not Found

2544 posts in 4256 days

#13 posted 12-06-2012 11:26 PM

Slip a metal tube over the allen key for more leverage, no metal tube? a ring spanner will do. The spindle locks works the way it should?

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1782 posts in 3850 days

#14 posted 12-06-2012 11:31 PM

it is this Skil= brand saw from Lowe’s. According to the manual it says that it should loosen by turning clockwies which would be the same way the blade spins. Regardless it doesn’t work. Maybe I’ll throw a hex insert bit into my 18v dewalt and see if that does the trick. Yet another reason why I really need to invest in a impact driver.

-- It's made of wood. Real sturdy.--Chubbs Peterson

View crank49's profile


4032 posts in 4257 days

#15 posted 12-06-2012 11:38 PM

Coke (Coca~Cola) might just work. I knew it was good for getting bugs off a windshield and I heard they use it at the maintenance department at Coca~Cola as an engine degreaser, so it has other uses that go beyond decaying your teeth, making you fat, and contributing to the development of diabetes.

But, the big clue to me is the fact that I have a machine in my jewelry business called a magnetic burnisher. It spins jewelry castings in a tub of polished steel shot having the effect of polishing them. The problem was that I only use it maybe one a week and while it was sitting unused the shot would develop a thin coating of oxide (like a pre-rust) that would turn the gold jewelry gray instead of polishing it. I tried all kinds of shot and additives that were supposed to fix the problem; none worked. I was about to give up on this $1200 machine when a jeweler friend asked me if I tried Coke. I looked at him like he was crazy, but he insisted it would solve my problem. Well, I tried it and voila, perfect polished castings. The theory is that the Phosphoric Acid in Coca~Cola removes the rust. I just know it works.

So, since I can confirm that Coca~Cola is a proven rust remover, maybe that is how it would help you get your saw blade loose.

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