LumberJocks

Table saw Blade Burning the wood

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by adot45 posted 07-28-2021 05:57 PM 451 views 0 times favorited 13 replies Add to Favorites Watch
View adot45's profile

adot45

343 posts in 1837 days


07-28-2021 05:57 PM

My table saw is starting to burn the wood so I removed the blade to try and clean it up. I thought the “vents” were plugged up with pitch/resin so was cleaning them out with an exacto blade….but after I did about 5 of them I thought are these rubber? And are they supposed to be in the vents? The blade seems sharp yet as I was cutting some purple heart without any trouble at all that’s why I thought I needed to clean it. Does this blade look dirty enough to be burning?

The blade is a Freud Diablo 10” 50 tooth

-- “Often wrong but never in doubt”. Dave in WV.


13 replies so far

View tvrgeek's profile

tvrgeek

2259 posts in 2862 days


#1 posted 07-28-2021 06:02 PM

Sometimes expansion kerfs are filled to reduce noise. Not vents. They are there to keep the heat from warping the blade.
Teeth do look a little dirty.
Were you crosscutting or ripping?

View adot45's profile

adot45

343 posts in 1837 days


#2 posted 07-28-2021 06:13 PM

Thanks tvrgeek, I was ripping. ( I got those little buggers put back in )

I ordered some blade cleaner too.

-- “Often wrong but never in doubt”. Dave in WV.

View EarlS's profile

EarlS

4724 posts in 3561 days


#3 posted 07-28-2021 06:36 PM

Any chance your fence is off just a bit? Or the edge of the wood against the fence might not have been straight?? You can also see burning if the board starts bowing or twisting as it is ripped and the internal stresses start re-balancing the board (most likely cause IMO). Otherwise, you might have some pitch/resin on the teeth that got too hot.

-- Earl "I'm a pessamist - generally that increases the chance that things will turn out better than expected"

View Robert's profile

Robert

4714 posts in 2693 days


#4 posted 07-28-2021 06:40 PM

Yes they are dirty.

You don’t need blade cleaner. KrudKutter and a stainless steel brush works beyond great. Soak it for a few minutes first.

EarlS makes a good point ^^

-- Everything is a prototype thats why its one of a kind!!

View adot45's profile

adot45

343 posts in 1837 days


#5 posted 07-28-2021 06:55 PM



Any chance your fence is off just a bit? Or the edge of the wood against the fence might not have been straight?? You can also see burning if the board starts bowing or twisting as it is ripped and the internal stresses start re-balancing the board (most likely cause IMO). Otherwise, you might have some pitch/resin on the teeth that got too hot.

- EarlS

Thanks Robert and EarlS I’m pretty sure my fence is in alignment but the proof will be after a blade cleaning does the burning stop or does it persist.

-- “Often wrong but never in doubt”. Dave in WV.

View gerrym526's profile

gerrym526

323 posts in 5021 days


#6 posted 07-28-2021 07:13 PM

Depending on how many board feet of lumber you think you’ve put through that Freud blade, you may need to look into having it re-sharpened by a quality saw blade service.
Or, depending on the re-sharpening cost vs. the cost of a new blade, you might think about replacing the blade.
In my opinion, Freud blades are a great value for the dollar, i.e not expensive, so a new blade won’t set you back that much.
Gerry

-- Gerry

View Ocelot's profile

Ocelot

3341 posts in 3851 days


#7 posted 07-28-2021 07:32 PM

I don’t know much, but …

I’ve had burning when there was an allignment problem. Somehow my fence got bumped out of square.

Also, I rip with 24 or 30 tooth ripping blades. I have never used a combo blade, but I would think fewer teeth might help. I bought a 2-pack of Diablo 40 tooth general purpose blades ($48 for 2) but have not tried them.

Finally, thicker wood fills the gullets more full, especially if the blade is set to just barely come above the top of the wood and there is little opportunity for the saw dust to escape. Full gullets might (I speculate) make for more burning. Some blades indicate they are best for thinner (4/4) stock and others for thicker stock.

-- I intended to be a woodworker, but turned into a tool and lumber collector.

View Ocelot's profile

Ocelot

3341 posts in 3851 days


#8 posted 07-28-2021 07:39 PM

From Freud’s description on HomeDepot site…

Diablo’s next generation 10 in. x 50 Tooth Combination Carbide Circular Saw Blade features new laser-cut stabilizer vents for precise and clean cuts in a variety of wood materials. The advanced stabilizer vents feature a permanent filler baked in from top to bottom for absorbing noise and preventing sideways movement, allowing the blade to slice through wood cleanly, quickly and accurately.

-- I intended to be a woodworker, but turned into a tool and lumber collector.

View adot45's profile

adot45

343 posts in 1837 days


#9 posted 07-28-2021 09:23 PM

Well, just for fun, I put on an older blade I had and the burning went away. Which I take to mean my Diablo is dirty, dull or maybe both. I will try cleaning and see if that helps but as Gerry pointed out, Freud blades are an excellent value, especially since there are no professional saw blade sharpening services in my little town. Thanks for all the comments.

-- “Often wrong but never in doubt”. Dave in WV.

View fivecodys's profile

fivecodys

1755 posts in 2849 days


#10 posted 07-28-2021 09:36 PM

Yes, a dirty blase can cause that. I use an old frisbee and diluted laundry soap to clean my blades. Works great.
I also bought a dedicated ripping blade. It’s a thinner kerf and only 24 teeth. Much better cut and no more burning. Yes, it’s a pain to change out when switching back & forth from crosscuts to rips but it does a better job and it should since that’s what it is designed for.

-- A bad day woodworking is still better than a good day working.

View tvrgeek's profile

tvrgeek

2259 posts in 2862 days


#11 posted 07-28-2021 10:06 PM

If you are ripping more than 3/4, I highly recommend a rip blade.

You can re-sharpen a Diablo a few times, but if you have to pay shipping, it may be cheaper to buy new. A Freud, having thicker carbides and more expensive, is economical for re-sharpening. A Diablo thin kerf rip is so cheap, it is disposable. With no local service, that may give you a decision, Diablo vs Freud, Amana vs Mamba. CMT does not make a low line. Ridge and Forrest don’t either.

FWIW, I gave up on combo blades. 60 tooth ATB crosscut and 24 tooth rip. Thin if under 3 HP. If a 3 HP cabinet, then full kerf. I guess if I was a builder and had a job site, cutting 2 x or ply then the combo would be a great time saver. As a hobbyist, I have the time to put the right blade for the job on.

I was amazed how well Trend blade cleaner works. I have not tried all the alternatives, but it works for me. Brass brush for the stubborn stuff.

View adot45's profile

adot45

343 posts in 1837 days


#12 posted 08-01-2021 12:05 PM



If you are ripping more than 3/4, I highly recommend a rip blade.

I was amazed how well Trend blade cleaner works. I have not tried all the alternatives, but it works for me. Brass brush for the stubborn stuff.

- tvrgeek

Saturday on the way home from a flea market I stopped at Lowes and picked up a 10” 24T Irwin Marathon blade. I figured first of all, get the right blade for the job (24 tooth), secondly, since they are going to be treated as disposable blades due to no sharpening service locally get a decent one but not the cheapest one.

The Trend blade cleaner did an awesome job cleaning up my older blades, spray on, wait a few minutes, wipe off with a soft cloth, clean as a whistle. Surprising really.

Thanks to all the LJ’s for the saw blade tutorial.

-- “Often wrong but never in doubt”. Dave in WV.

View MrRon's profile

MrRon

6132 posts in 4456 days


#13 posted 08-01-2021 08:39 PM

Remember a brand new blade won’t guarantee a clean cut. Any new blade will benefit from a professional sharpening before being put into service. That is why a Forrest blade will give the cleanest cut, as long as it is kept clean. There may be other blades so set up to give clean cuts right out of th box, but I don’t know which they are.

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com