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What blade for 12" SCMS?

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Forum topic by brucet999 posted 05-25-2019 08:18 PM 278 views 0 times favorited 12 replies Add to Favorites Watch
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brucet999

8 posts in 113 days


05-25-2019 08:18 PM

Topic tags/keywords: saw blades scms miter saw question

I will be buying a 12” SCMS soon and want to equip it with a good thin kerf blade. I have been happy with my Freud Industrial 10” table saw blade so had intended to get a Freud Industrial 96T 12” thin kerf “Miter & Cut Off” LU74R012 for the SCMS. Cost at Woodcraft Supply $107.

Woodcraft also offers a Forrest 12” thin kerf for $208. Not sure how I would get twice the value for that one. What am I missing?

Freud website shows 12” “Thin Kerf Sliding Miter” with 72 teeth, LU91R012 and a “Thin kerf Fine Finish Crosscut” with 80 teeth.

I mostly cut Baltic Birch plywood and various hardwoods.

Any advice for me? What differences would I see between 72, 80, and 96 teeth?


12 replies so far

View Aj2's profile

Aj2

2263 posts in 2184 days


#1 posted 05-25-2019 09:21 PM

My suggestion is no thin kerf on a scms. Full 1/8 will give you a better cut through thick harder material. And do well on thin stuff.
Good Luck

-- Aj

View knotscott's profile

knotscott

8289 posts in 3761 days


#2 posted 05-26-2019 12:03 AM

I agree with AJ2. Go with full kerf for a 12” blade. It’s a wider span and will benefit from the extra stability of the full kerf. Corsscutting doesn’t require as much effort as ripping, so there’s really no reason to go with the TK.

You’ll want a blade with a very low to negative hook. More teeth equates to cleaner cut, but with more resistance, heat, and chance of burning. Some of the Freud blades are excellent, but I’d also look into Infinity, Ridge Carbide, and Forrest.

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

View Rayne's profile

Rayne

1206 posts in 1925 days


#3 posted 05-26-2019 02:43 AM

I’ll add another suggestion to your list. Infinity Tools 12” MS Blade is amazing. Cuts like butter.
https://www.infinitytools.com/saw-blades-accessories/miter-saw-blades-accessories/miter-saw-blades/12-mitre-saw-blade-90t-110-kerf
They’re also doing $10 off over $75 and I believe you’ll get Free Shipping over $100. (might need to add $.10 cents to make it after the discount). Code: MEMDAY19

View SMP's profile

SMP

1017 posts in 291 days


#4 posted 05-26-2019 04:55 AM

I also don’t recommend thin kerf for it. You aren’t ripping anyways and the 12” scms blades tend to deflect and torque flex more than a 10” blade.

View CaptainKlutz's profile (online now)

CaptainKlutz

1340 posts in 1880 days


#5 posted 05-26-2019 11:35 AM

+1 full kerf only. Thin kerf == flex and uneven cuts.
Freud Ultimate Cross Cut blade thin kerf drove me nuts with uneven cuts in eoxtic hard woods, or when it hit a knot or serious grain change. Won’t use TK blade on miter saw anymore.

Suggest:
60T for 16/4+ lumber
80T for 8/4 thru 12/4 lumber
90T-100T for up to 8/4 lumber

More teeth = finer cut = smaller tear out.
Except using too many teeth on thick lumber creates burning and creates slower feed rate.

I feed speed is too slow, might have to use blade with 80T when cutting 8/4 thick woods prone to burn like maple or cherry, while can use higher 100 tooth count on course woods like Oak or Ash or 4/4 cherry/maple.

Forest Chopmaster are nice blades, but Tenryu sells a 100T full kerf that cuts super smooth and is half the price.
Bottom line: can find many different miter blade solutions to similar challenges. Choice depends on what you cut, and your desired results.

YMMV!

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

View Greg66's profile

Greg66

30 posts in 43 days


#6 posted 05-26-2019 03:01 PM

A thin kerf blade will never give you an accurate cut because it’s not stiff enough, too much flex.
The Forrest blade might cost double but it will last five times longer and give you near perfect cuts every time. The cut surface is smooth as glass. I do a lot of staingrade trim in new houses and wouldn’t consider any other brand after trying them all. My experience has been that the Chopmaster is actually much cheaper in the long run due to its much longer life and you’ll never have to recut something because of blade flex. I do a lot of 8” crown mold and the thin kerf blades almost always leave a gap in the middle of the cut due to blade flex. You will not regret buying a premium blade.

View Gene Howe's profile

Gene Howe

11569 posts in 3814 days


#7 posted 05-26-2019 03:27 PM

As above no thin kerf blade. I only use Tenryu Miter pro 60 or 80 tooth. But, mines a 10 ”. You’d want a higher tooth count for 12” for clean cuts.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View brucet999's profile

brucet999

8 posts in 113 days


#8 posted 05-26-2019 04:30 PM



I ll add another suggestion to your list. Infinity Tools 12” MS Blade is amazing. Cuts like butter.
https://www.infinitytools.com/saw-blades-accessories/miter-saw-blades-accessories/miter-saw-blades/12-mitre-saw-blade-90t-110-kerf
- Rayne

Thanks for the link.

At .110, this is a 7/64” kerf, so halfway between standard 1/8” and most thin kerfs’ 3/32”. Can you re-cut hardwood to take off, for instance, an additional 1/32” without deflection?

View brucet999's profile

brucet999

8 posts in 113 days


#9 posted 05-26-2019 04:40 PM



+1 full kerf only. Thin kerf == flex and uneven cuts.
Freud Ultimate Cross Cut blade thin kerf drove me nuts with uneven cuts in eoxtic hard woods, or when it hit a knot or serious grain change. Won t use TK blade on miter saw anymore.

Suggest:
60T for 16/4+ lumber
80T for 8/4 thru 12/4 lumber
90T-100T for up to 8/4 lumber

More teeth = finer cut = smaller tear out.
Except using too many teeth on thick lumber creates burning and creates slower feed rate.

I feed speed is too slow, might have to use blade with 80T when cutting 8/4 thick woods prone to burn like maple or cherry, while can use higher 100 tooth count on course woods like Oak or Ash or 4/4 cherry/maple.

Forest Chopmaster are nice blades, but Tenryu sells a 100T full kerf that cuts super smooth and is half the price.
Bottom line: can find many different miter blade solutions to similar challenges. Choice depends on what you cut, and your desired results.

YMMV!

- CaptainKlutz

Thanks for the detailed response. Your experience with the same Freud blade I am considering is just what I needed to hear.

You clearly agree with the majority here who advocate for full 1/8” kerf for SCMS. I am running a thin kerf on my inexpensive existing 60T 10” without noticeable deflection even when taking off an additional 1/32” on a hardwood cross-cut (haven’t tried it on a steep miter angles), so I assumed a high quality thin kerf 12” blade would perform as well.

The burning on thicker stock may explain why Freud website recommends maximum 1 5/8” cut depth on the 96T blade.

View Planeman40's profile

Planeman40

1406 posts in 3147 days


#10 posted 05-27-2019 01:49 PM

Surprise, surprise!!!

About four years ago I won a 12” Hammer K3 Winner table saw in Hammer USA’s drawing. Had to get a blade to fit it and was hard pressed for cash at the time. Bought a Harbor Freight 12” 96 tooth blade and sent it off to Forrest blades to have the center hole punched to fit the European hole arrangement. Saved some money. It turned out that this blade is the best blade I have ever had!!! I never replaced it and don’t intend to. You might consider.

-- Always remember: It is a mathematical certainty that half the people in this country are below average in intelligence!

View Gene Howe's profile

Gene Howe

11569 posts in 3814 days


#11 posted 05-29-2019 05:30 PM

Wow, that’s the first endorsement of HF saw blades I’ve seen. Wonders never cease! There are some gems at HF, I just never considered trying their saw blades.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View AZWoody's profile

AZWoody

1449 posts in 1610 days


#12 posted 05-29-2019 05:36 PM



Wow, that s the first endorsement of HF saw blades I ve seen. Wonders never cease! There are some gems at HF, I just never considered trying their saw blades.

- Gene Howe

I’ve actually seen them recommended before. It’s definitely one of those diamonds in the rough.

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