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Diablo Blade Cupped

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Forum topic by Rammstein1224 posted 04-11-2017 04:20 PM 539 views 0 times favorited 17 replies Add to Favorites Watch
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Rammstein1224

28 posts in 277 days


04-11-2017 04:20 PM

After finding out my brand new freud diablo blade for my table saw was starting to cup and burn my wood i took it back to where i got it and luckily it was still within the exchange period. So i got the new one on and get everything all zeroed in and realized this blade is cupped right out of the box, not enough to burn the wood but enough that it measures different at different points on the saw. Anybody have this issue? Is a saw blade supposed to have a cup to it? Any tips on bending it back in shape?

-- As an OCD engineer I live in a perfect world with a hobby of woodworking that is anything but perfect.


17 replies so far

View TheFridge's profile

TheFridge

8323 posts in 1324 days


#1 posted 04-11-2017 04:23 PM

I would lean toward the arbor flange or washer being of after 2 blades with same problem.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

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Rammstein1224

28 posts in 277 days


#2 posted 04-11-2017 04:28 PM

Doubt it since the first one had it before i made a single cut. It was annoying the hell out of me trying to square everything up until i realized the blade was cupped. Also i can set the blade down on a flat surface and put a straight edge on and visibly see one side is cupping up and the other cupping down


I would lean toward the arbor flange or washer being of after 2 blades with same problem.

- TheFridge


-- As an OCD engineer I live in a perfect world with a hobby of woodworking that is anything but perfect.

View Aj2's profile

Aj2

1177 posts in 1636 days


#3 posted 04-11-2017 05:48 PM

Try a Forrest blade it will be very flat.Maybe even flat enough to satisfy a perfectionist with OCD.:)
I use Forrest blades so that’s the main reason I’m recommending them.

-- Aj

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Rammstein1224

28 posts in 277 days


#4 posted 04-11-2017 06:05 PM

Well after reading great reviews i had thought Freud was up there with the best. Is it one of those deals where they used to be great but not any more?

-- As an OCD engineer I live in a perfect world with a hobby of woodworking that is anything but perfect.

View buckbuster31's profile

buckbuster31

203 posts in 353 days


#5 posted 04-11-2017 06:22 PM

freud and diablo are not exactly the same. they are the same company, but the one everyone reviews are not the diablo blades. Diablo are the big box stores version of it. I have had very good experience using a diablo to rip stock, but it is not my go to blade for everything, that is for sure. Check to see if that blade is still made in Italy. I had heard reports the diablo line was moving to china I believe.

View Carloz's profile

Carloz

979 posts in 429 days


#6 posted 04-11-2017 06:51 PM

How much does it cup? If it is under 0.0135” ( the kerf over plate elevation) it should not matter.

View Rick_M's profile

Rick_M

10634 posts in 2218 days


#7 posted 04-11-2017 07:07 PM

You can’t bend it back. Return it and buy a different brand. I haven’t had that problem with Freud but two of my old Freud blades have developed a harmonic that leaves a wavy cut. My newest Freud blade is fine and my oldest Freuds are fine but I might try a different brand next time. I’m sure the Forrest blades are great and I like buying American made so I might go that way or I might try Amana or CMT.

One other thing, make sure you measure to the teeth and not the plate

-- http://thewoodknack.blogspot.com/

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Rammstein1224

28 posts in 277 days


#8 posted 04-11-2017 07:09 PM

Freud is the brand, diablo is the line of blades they make so yes freud is not diablo but diablo is freud. This is the one i seemed to find alot of people liking along with what seems like good reviews https://www.amazon.com/D1040X-Diablo-10-Inch-40-Tooth-PermaShield/dp/B00008WQ2X/ref=sr_1_9?ie=UTF8&qid=1491935608&sr=8-9&keywords=diablo+blade

I just picked mine up locally just because i didnt want to wait so i doubt its any different. It says its made in italy still at least. As far a quality goes it cuts great but so would a brand new harbor freight blade. Its when the first blade started going out past the kerf that it started burning real bad.


freud and diablo are not exactly the same. they are the same company, but the one everyone reviews are not the diablo blades. Diablo are the big box stores version of it. I have had very good experience using a diablo to rip stock, but it is not my go to blade for everything, that is for sure. Check to see if that blade is still made in Italy. I had heard reports the diablo line was moving to china I believe.

- buckbuster31


-- As an OCD engineer I live in a perfect world with a hobby of woodworking that is anything but perfect.

View Rick_M's profile

Rick_M

10634 posts in 2218 days


#9 posted 04-11-2017 07:34 PM

Burning is not necessarily a sign of a bad blade. Burn happens for a number of reasons like feed rate, tooth count, dullness, saw power, and some woods like cherry are prone to burning.

-- http://thewoodknack.blogspot.com/

View knotscott's profile

knotscott

7787 posts in 3213 days


#10 posted 04-11-2017 07:37 PM

Was it literally cupped right out of the box, or cupped after you installed it? Overtightening if the arbor washer and flange don’t match up well can force a blade to cup.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View Rammstein1224's profile

Rammstein1224

28 posts in 277 days


#11 posted 04-11-2017 07:38 PM

It is when the red coating is being rubbed off onto the work at the same time…


Burning is not necessarily a sign of a bad blade. Burn happens for a number of reasons like feed rate, tooth count, dullness, saw power, and some woods like cherry are prone to burning.

- Rick M


-- As an OCD engineer I live in a perfect world with a hobby of woodworking that is anything but perfect.

View Rammstein1224's profile

Rammstein1224

28 posts in 277 days


#12 posted 04-11-2017 07:43 PM

I didnt check RIGHT out of the box because i noticed it when i was trying to get the fence to square up against the blade and noticed the cup. I dont have a torque spec i go to for obvious reasons but i dont think i superman it on there but just a nice snug tightness since it really should torque itself down like a turbo wheel but ill take a look at any potential misalignment. Thats a good idea.


Was literally cupped right out of the box, or cupped after you installed it? Overtightening if the arbor washer and flange don t match up well can force a blade to cup.

- knotscott


-- As an OCD engineer I live in a perfect world with a hobby of woodworking that is anything but perfect.

View bigblockyeti's profile

bigblockyeti

4697 posts in 1559 days


#13 posted 04-11-2017 07:56 PM

What saw are you using these blades with?

View knotscott's profile

knotscott

7787 posts in 3213 days


#14 posted 04-11-2017 08:05 PM

The Diablo is generally good value, but I have been reading that they may be making them in China now….could be some growing pains if so. Freud Industrial or Diablo made in Italy are a better bet. Irwin Marples is another good value choice. Infinity makes some of the best blades I’ve used, and they’re not overly expensive either.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

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Rammstein1224

28 posts in 277 days


#15 posted 04-11-2017 08:16 PM

Old Delta 34-670 didnt have a problem with the blade that i got it with but i only made a few handfuls of cuts before i got around to getting a new blade.


What saw are you using these blades with?

- bigblockyeti

-- As an OCD engineer I live in a perfect world with a hobby of woodworking that is anything but perfect.

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