Broken tooth

[LCHIEN]

Miter saw been splintering and making rough cuts whereas it used to give polished cross cuts with the Diablo D12100X 12" ATB miter saw blade.

On inspection found a broken tooth The other teeth look and feel OK but this one is rough around the edges. Almost directly opposite the broken tooth (49, but not 50 teeth away) is a slightly bent tooth. My dial indicator says its .009" bent to the side.



Have the tooth replaced? Resharpened? $29 for sharpening not sure how much for the tooth. Two years old

New $75 at HD, $58 at Amazon.

What's the advice here?

Maybe I did this when cutting some Aluminum. Should have put on the cheapo blade that came with the saw. HiATB blades are fragile at the tips. Was too lazy for one cut. From now on just TCG non-ferrous metal cutting blades for aluminum!.

[LCHIEN]

How I ended up with this blade

https://www.sawdustzone.org/forum/discussions/tool-talk/846100-miter-saw-tearout

[capncarl]

I don’t know about tooth replacement. I have a couple of 3/4” carbide tipped 111” blades for my Rikon bandsaw. I hit a loose knot while resawing a large piece of old sinker pine and the proverbial hitting the fan happened, bending the blade and knocking off several carbide teeth. I sent it back to have the teeth replaced and blade re-straightened. If the replacement of carbide bits are an example of what a repaired blade looks like then I’d say you would be better off trying to grind that bad tooth off and continuing using the blade.

[LCHIEN]

Talked to the foreman at the local sharpening company.

He said that replacing a tooth would cost about $25. he recommended that they would just grind down the old tooth so it didn't stick out and that you'd never notice being just a 99T blade instead of 100.

I also said one tooth looked bent, he said they would straighten the tooth and grind it in line with the others.

So is it worth having this blade reworked for $29 as a spare?

[twistsol]

I use Quinn Saw for sharpening and they do an excellent job. Their price for sharpening a 100 tooth blade is $30 and $5 to replace a tooth. By the time you pay for shipping, you'd be at the same price as new from Amazon.

I'd be concerned about the balance of the blade spinning at high speed with a tooth missing.

[LCHIEN]

I'm not too worried about the balance. Its only half a tooth out of 100 so a half a percent imbalance, And the weight of all the teeth is a small fraction of the weight of a 12" steel disk.plus the motor rotating mass, even though those are less than 100% of the radius.

[LCHIEN]

Left the blade off to be sharpened/repaired Tuesday.
Pickup/dropoff day is Monday every week so I hit the worst case cycle time. Be about 2 weeks before its back.

[dbhost]

I managed to break a tooth on a D1280X, basically the 80T version of that blade. I was cutting some maple and managed to find a piece of metal embedded in the wood that escaped the sawmill, and was discovered by my blade. That was blade #1 on my old HF 12" slider that is now in a friends shop... Blade #2 got transferred to my Metabo 12" slider with no damage...

I just chucked the old blade in the recycling and tossed the new one on. Didn't figure it was worth fixing, they are reasonably inexpensive and I had gotten a bunch of use out of the thing... Now I am wondering if I should have kept it and had it fixed...

[LCHIEN]

I got a new one (D12100X) for $60, overnight.

I figured I'll have the old one sharpened and basically fixed for $30 and have a spare blade with 98 or 99 of the original teeth sharp and ready to go.
A spare or one to check when I think the blade in the saw is dull.