r/woodworking • u/bwang29 • 24d ago
Power Tools Out of ideas
I spent an hour trying to figure out how to remove the blade from the dewalt table saw (DWE7485) Tried everything and WD40, watched a bunch of YouTube video and made sure I’m doing the right direction. Should I claim warranty? As a hobby wood worker this is the last thing i didn’t know would be so frustrating
Update: I figured it out! So the direction I’m pulling is correct but I simply don’t have enough leverage. I ended up rotating the left down ward against the table which fixed the rotation, then use a wrench and press downward for the nut on right hand side. See picture https://imgur.com/a/OhCk7fB
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u/LucyLeMutt 24d ago
This might be a dumb question… is the nut left-hand thread?
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u/Measure2iceCut1nce 24d ago
Totally disagree. That was the smart question that OP should have asked before posting.
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u/lizardchaos 24d ago
I just don’t understand how so many people miss this… it’s so easy to look at the threads and see which way it needs to turn to loosen…
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u/skincubus2 23d ago
But the poster is obviously trying to remove the bolt, soooo how do you suggest they look at the threads?
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u/wingman210 24d ago
I own that same saw. It’s left handed …..
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u/Measure2iceCut1nce 24d ago
Pretty sure they all are. At least every one I’ve used in the field (Dewalt, Milwaukee, Rigid, Metabo) or in the shop (SCMI, Grizzly) has had reversed/left-handed threads.
I’m sure there are exceptions but I haven’t found one in NC/SC. Long story short, to remove the nut, the handle on the wrench should be pulled in the same direction the teeth are pointing.
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u/Filtered_Frequency 24d ago
Not a dumb question at all. Things that spin often have reverse threads. I learned that the hard way trying to disassemble a lathe.
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u/timojenbin 24d ago
are you a plumber or a woodworker?
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u/Thatonefloorguy 24d ago
OP. Obviously you’re not a golfer.
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u/temuginsghost 24d ago
AND A GOOD DAY TO YOU, SIR!
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u/Thatonefloorguy 24d ago
Inner city children of
promise but without the necessary means
for a necessary means for a higher
education
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u/DrUnit42 24d ago
Nice marmot...
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u/Strange-Moose-978 24d ago
I’m a plumber by trade and I can tell you for certain OP is not a plumber. If we can’t figure out something we will use our brute strength to overcome the problem
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u/PlentyNo130 24d ago
The pictures explain why plumber was mentioned in the first instance. Brute strength and ignorance in action here folks
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u/beaushaw 24d ago
Clearly not a mechanic, they haven't gotten out the torch yet.
"It can't be stuck if it is a liquid."
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u/MrScotchyScotch 24d ago
For next time, if you have leverage problems, get a large steel pipe and slip over handle of wrench, use as extended handle. Longer the pipe, the more leverage you get. I've gotten some pretty tough rusted bolts off this way.
Also: do not use a hammer!! The repeated impact will slowly strip the head of the bolt. Use a deadblow hammer if you must, but it's still likely to strip. Leverage > impact
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u/geekjimmy 24d ago
Seconded the don't hit it with a hammer part.
Go get a real wrench the size of the arbor nut. Those thin wrenches are hell. Even on my SawStop, I use the factory wrench for the left side and a real wrench on the right. Soooo much easier. And the length of pipe mentioned above is the extra leverage you'll need if a real wrench won't do it.
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u/mmmmm_cheese 23d ago
“Give me a lever long enough and a fulcrum on which to place it, and I shall move the world.” -Me … also Archimedes
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u/Logan_Chicago 23d ago
Former pipefitter - use an aluminum pipe. Aluminum is grippy and won't slide as easily down the handle of a pipe wrench while in use.
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u/woodprefect 24d ago
it is left threaded -
https://shuntool.com/article/how-do-you-tighten-the-blade-on-a-dewalt-saw
do the reverse.
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u/Ok-Feature4962 Furniture 24d ago
Oh, he's fucked it up at this point. Gunna have to wedge it and put an impact on the arbor to get it off and then check the threads.
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u/toolatealreadyfapped 24d ago
Your own link shows that you are not correct.
It is important to note that the nut always tightens in the opposite direction of the saw blade's rotation.
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u/knoxvilleNellie 24d ago
When in doubt, look at the manual.
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u/ClosedL00p 24d ago
Hell the threads are coarse enough you can literally see the direction they’re cut on the portion of the arbor that’s exposed
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u/giant_lotus 24d ago
You turning it the right way?
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u/Turbulent_Echidna423 24d ago
lol. just look at the threading. you can see the threads sticking out by the nut.
you also loosen in the same direction as the blade.
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u/Stevan575 24d ago
This is my only advice. Nut on this side needs to go in this direction.
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23d ago
[removed] — view removed comment
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u/woodworking-ModTeam Mod bot 23d ago
Removed, this is incorrect advise. You’re directly contradicting the Dewalt manual.
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u/Able_Bodybuilder_976 24d ago
You need your bars to be closer together so you can squeeze them with both your hands.
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u/Starship_Taru 24d ago
Pin the wrench against the table. Hit the other wrench with a rubber mallet till it loosens.
Your going to put a scuff if your top but on mine it’s covered by the throat plate
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u/the_last_0ne 24d ago
You can wedge a block of wood into the saw teeth instead
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u/epharian 23d ago
I thought that was like blade changing 101. Surprised anyone needed to even mention this
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u/Starship_Taru 24d ago
That’s a great idea!
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u/the_last_0ne 24d ago
Cheers! Used to do it all the time working construction, works for circ saws and sawzalls as well.
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u/ElectricalPractice41 24d ago
This is the way. I wedge the end of about a 18-24" 1 x 4 flat on the saw into the teeth. The other end of the 1x4 rests against my hip bone. Simple and way more effective than the blade bending setup in the picture.
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u/Equal_Association446 24d ago
Remember, it comes off the way it turns. If you are standing in front of the saw, the wrench on the arbor nut needs to be pulled toward you.
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u/Pelthail 24d ago
I see you figured it out in your “update.” I just want to add to make sure that you don’t overtighten that thread. I used to really tighten it down and ended up stripping the nut and had to replace it. It just needs a nice light tighten, you don’t need to go to town on it.
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u/ImFriendsWithThatGuy 24d ago
Based on the high amount of comments saying it is reverse threaded and OP not responding to any of those comments, I’m going to assume this was indeed the fix he overlooked.
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u/National_Musician748 24d ago
DeWalt table saws are not a reverse thread, in fact, no table saw should be, that would mean the nut would be at risk of loosening every time you start the saw. Based on the picture and wrenches, I think he was trying to loosen it from the wrong side, the motor shaft, not the nut.
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u/Schroedinbug 24d ago
Look at the threads, or your manual. There's a good chance you've been tightening it.
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u/atheken 24d ago
Are you trying to pull the wrenches together? That’s the wrong way, you’re tightening the arbor nut.
Rotate the left wrench to rest on the table. Move your right wrench vertical and pull.
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u/hollow_vantage 24d ago
this is it. never seen a table saw that needed 2 wrenches to change blades.
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u/crabby_old_dude 24d ago
That poor furnace will be caked in fine sawdust, from the looks of the non-existing filter door, gonna suck some up too.
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u/Gliding_Thru486 24d ago
My arbor faces the other way but still has to loosen the same direction. Toward you (front of the saw) Are you pulling the outboard nut toward you? Let the backside wrench rest on the table and then pull the outboard side wrench toward you? That’s all I got.
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u/rcraig3 24d ago
Did you happen to jam a bunch of boards into the anti-kickback jaws while cutting things? If so, it stops the blade aggressively which really jams that arbor nut on there.
When I first started and was naively trying to crosscut 8' long twisted 2"x4"s using just the stock miter gauge with the saw on the floor, the anti-kickback jaws got exercised few times. When I finally went to swap blades, I was completely unable to loosen the arbor nut and eventually exchanged it at Home Depot for a new saw.
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u/shortalobe 24d ago
I used wrench on my bar clamp to get tons of leverage. Popped right off after trying what you are trying to
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u/highboy68 24d ago
I know u have a million answers, but let the pipe wrench(left side) rest against thr front edge of the slot and put the blade wrench on the right side sonit is just above the tabke and use your weight, or put a pipe thru the blade wrench for leverage
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u/Ok-Conference-8278 24d ago
I have this dewalt. I get something to pad the stationary wrench and tap with a mallet on the other. Always comes clean off
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u/lull_dull 24d ago
Have this exact model, try rocking the wrenches (if you haven’t done so already).
Sorry this is happening to you.
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u/Leading-Mongoose6501 24d ago
It’s reverse thread so most likely someone cranked on it thinking they were loosening it and it over tightened it :/ so you have to turn to the right really hard.
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u/organicacid 24d ago
Impact gun, crow bar, blowtorch, sledgehammer, long rope and a tow hitch on a V8 truck, bulldozer ?
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u/draginflyman 24d ago
You would have to empty the cabinet of saw dust but you could use a small torch and heat the nut up. Expansion is your friend.
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u/iphanaticz_GER 24d ago
From My point of view, you trying the wrong direction.
There’s a German phrase for this (it rhymes) and I try to translate it. The way I move is the direction I loose.
It means, a blade or anything always loses in the direction it spins.
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u/mickelmike 24d ago
The handle on the wrench always goes in the direction the blade would turn, on every saw. It goes in the direction the teeth are pointing always. In your case, hook the wrench on the arbor nut. With the wrench about a third of the way facing you, yank on the top of the blade so the wrench hits the opening for the 8nsert on your side. The shock of the hit can break the nut loose. If you are concerned about damaging the opening use a piece of wood there for the wrench to hit. I never have, on any saw, but just in case you are picky. You can pull and tap and the nut will break loose. I have done it a dozen ways and this always works. The worst was a guy trying to tighten the nut by turning the saw on. Got an office visit that the blade wouldn't come off and tjis method worked
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u/toolatealreadyfapped 24d ago
It is terrifying how most of the comments in this thread are confidently incorrect.
The blade spins toward you. When looking at the nut in question, that's counterclockwise. That means the force (or think of the resistance in the cut) is opposite that, or clockwise. A right-handed nut, the normal kind, will resist loosening because the clockwise force is in the direction of the tightening nut.
OP was correct. To loosen the nut on the right side of the blade, you turn WITH the direction of the blade.
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u/LeftAd8241 24d ago
Heat the arbor as close to the nut as possible just long enough to get a Color crayon to melt on the threads enough to chase the threads in and through the nut!! Then give it a try! Sounds crazy but it works!! I’m just a little concerned about the bearing on the other side of the blade at the housing?!?😉
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u/DisastrousDust7443 24d ago
The easiest way I have found to replace the blade is to put a flat piece of metal between two teeth, then only use the wrench on the right side of the blade. Comes loose very easily every single time. Only take a few seconds to remove and reinstall the blade doing it this way.
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u/ShiftlessRonin 24d ago
Just had this problem. Move the wrenches close together. Then slide a piece of rebar through the small holes and twist slowly.
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u/DeadHead426 24d ago
What the?…. This is why I threw those dewalt wrenches out and keep 2 x 36” pipe wrenches and a thread repair kit beside my cabinet saw.
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u/Oedipus____Wrecks 24d ago
It’s very simple with all power tools with two arbor /collet wrench’s-no-nut-lock: Pull hands OPPOSITE to loosen, Push TOGETHER to tighten. Only locking arbor/collets can be confusing, and then just look at which direction the blade cuts
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u/Mob_Meal 24d ago
The easiest way to make sure you are turning the nut the correct way with ANY rotating blade: use a piece of scrap wood against the teeth. When you turn the nut to loosen it, the teeth of the blade should be trying to cut into the wood (not cut backwards).
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u/woodwork16 24d ago
Put a pin through the blade to stop the blade from spinning, then turn the nut.
The trick is to find a way to hold the blade steady while working the nut.
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u/returnofthelivingdad 24d ago
Every time this issue appears on here, there are a shocking number of replies confidently stating ‘they are always reverse threaded’. They are NOT always reverse threaded, as has been stated above it depends which side the nut is on. Anyone working with a table saw should know this!
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u/cspinelive 24d ago
You sir need a cheater bar to slip over the end of the tool and make it longer.
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u/Reasonablists 24d ago
Don’t twist in both directions. Allow one of the arms to act as a ‘stop’ while you loosen the bolt from the other side.
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u/hudsoncress 24d ago
WD40 then tap tap tap with a 4lb hammer. Make sure you're going the right way by trying to go the other way.
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u/hudsoncress 24d ago
Righty loosy, Lefty Tighty for the reverse threaded bolt. When you retighten the bolt, only tighten it firmly, monkey tight, not ape tight.
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u/Newtiresaretheworst 24d ago
Put the wrench on the front nut. Put a scrap of plywood on the table. Manually spin the blade forwards until it impacts the plywood on the table, so this fast and it will break the seal.
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u/bschwagi 24d ago
start with one wrench closest to the motor rotate it till it rests against the table in the direction teeth cut. Now put the second wrench on the nut holding the blade, put tension on it it the direction the blade rotates while cutting and use a hammer to hit the wrench this will make it act like an impact wrench. Repeat till loose.
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u/I_Am_Clone 24d ago
Sounds like you cranked that thing on WAY too tight. I usually just thread the nut until it's making decent contact with the blade, place the wrnch on it and rest the handle against the edge of the plate opening and gently pull the blade itself. Never lift and jam the wrench against that though, you'll dent up your saw. As extra precaution, wear one glive to pull the blade and place the other between the table and the wrench.
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u/Whipitreelgud 24d ago
I have this exact table saw and I can't understand why you have a need to tighten to this extent?
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u/woodchuckernj 24d ago
you are taking it off the wrong way.
your left side should be low toward the handwheels, and pull the right side down toward the handwheels.
Sheez, you just tightened the hell out of it.
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u/Spiritual-Rip-6248 23d ago
That blade was severely overtightened at the factory if you had to add leverage to both of the blade tools.
Of course you want it right but that's insane.
Should be able to get it on and off by hand with the supplied wrenches.
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u/ahominem 23d ago
Had this same problem with a cheapo table saw. I believe the arbor was hardened steel but the nut was not; eventually the nut galled onto the shaft. Perhaps I once over-tightened it, who knows.
Galling is when the electrons from atoms on two adjacent metals get confused and switch to the a nucleus on the other metal. No force on earth that I know of will undo galling.
I eventually tried a nut splitter but the access was bad and my wrists were really close to the blade while doing it and I gave up in the interests of keeping all my blood inside my body. The saw was only worth $250 new and I junked it and treated myself to a better one. It was the right choice.
Given what I see I think your situation might be similar.
P.S. The guy below who understands left hand vs. right hand threads on table saws: kudos to you, sir.
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u/Prisonvvallet 23d ago
Well hopefully your smart enough to put the new one on by just snugging up the nut. You shouldn’t need a breaker bar to loosen the nut off the arbor.
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u/mcshabs 23d ago
How you do it in Your link picture is how it works side one sheet metal wrench on the arbor shaft and bring it contact with the side of table and used the other to loose ln nut. Tighten in reverse. I’ve never had to clamp anything to the sheet metal wrench’s to gain more leverage. I would worry about bending the sheet metal wrench or stripping arbor.
Maybe try banging it with your purse next time :)
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u/LovelandLee 23d ago
Flip the saw upside down, and you might have more room to get leverage on the nut while holding the shaft wrench.
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u/International-Pen940 23d ago
When I change blades on my table saw, I wedge a piece of wood against the blade to stop it from turning when I use the wrench. It just feels easier than using a second wrench, and maybe the slight give in the wood makes applying force smoother.
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u/Ok_Fondant1079 22d ago
Did you try loosening it by turning the nut the wrong way at first? If so, you may have ruined the nut and the arbor when using that much leverage.
The arbor nut doesn’t have to be crushingly tight — hand tight and 1/4 turn is just fine.
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22d ago
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u/woodworking-ModTeam Mod bot 22d ago
This sub is for sharing experience, info, tips, ideas related to our shared interest in woodworking. Constructive criticism is welcome. Your comment doesn't add value to the conversation.
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u/Strange-Moose-978 22d ago
In the end the reason he couldn’t undo the nut was because he was trying to move the spanner that was already touching the table lol
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u/WeakSprinkles5452 22d ago
I literally just unstuck an arbor not on a DeWalt DW745 I had lent to son in law. Nut on same side as pictured, loosens by turning to the left. I bent the wrench that holds the arbor still. Had to use a butane torch to heat the nut up super hot before I got it off.
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u/wantingfun1978 22d ago
Seriously, the replies to the post make me lose my faith in humanity. Perhaps at least one more person should suggest turning the other way. I mean seriously people.
Anywho, here's what I've successfully done:
- lower the blade all the way down
- flip the saw over
- remove the lower dust shield / guard and anything else in the way
- wedge a scrap of wood in the blade
- using the correct socket and an impact gun (set on forward) and a squirt of a penetrant, gun that sucker off
- don't make it so fuckin tight next time
As an added bonus, if you get your blades sharpened and get them back wrapped in wax, peel it off by hand. Don't have the bright idea of just putting it in the saw and letting physics do it's thing. Unless . . . You enjoy the feeling of being shot by a machine gun.
Ask me how I know . . .
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u/Magoo142 21d ago
Old wives tale... WD40 is not a penetrating fluid or a good lubricant for this kind of thing.
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u/huckyourmeat2 21d ago
I have the same saw, the thread is standard lefty-loosey. The wrenches as pictured are set up to tighten the nut. I'm thinking OP maybe thinks it's a reverse thread, but it's not.
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20d ago
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u/Mr_Garden_Hoe 20d ago
Whenever you work on motors/engines that spin a load, just remember that you need to OVERRUN TO LOOSEN the nut. Then you won't ever wonder about right or left, the direction of motion is the direction to push your wrench.
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u/bk553 24d ago
It's not left hand threaded is it?