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Forum topic by Carloz posted 12-17-2017 03:45 PM 906 views 0 times favorited 13 replies Add to Favorites Watch
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Carloz

1147 posts in 734 days


12-17-2017 03:45 PM

Since my thin kerf Diablo was shot by Sawstop I need a new one. I really liked it and it did all crosscuts for me too. I only put on the crosscut blade when cutting plywood.
Should I get the same one or switch to full kerf? If so which one ?
I noticed that Freud LM74 is designed to rip only 1” thick wood,while LM72, is for 3”. What happens when cutting very thin wood with LM72 or thick wood with LM74 ?


13 replies so far

View ArtMann's profile

ArtMann

1078 posts in 958 days


#1 posted 12-17-2017 04:07 PM

If I were you, I would buy a good quality combination blade. You may not recognize it now but rip blades do a very poor job of cross cutting by comparison.

View knotscott's profile

knotscott

8129 posts in 3518 days


#2 posted 12-17-2017 04:38 PM

If your SS is 3hp+, go full kerf, if not I’d lean toward a good TK blade.

As ArtMann pointed out, the rip blades won’t do a great job crosscutting in most cases. The Diablo 24T ripper does at least have an ATB grind which improves it’s crosscut ability, but 24T is still a very low tooth count for crosscuts. If you want to be able to rip thicker stock and still do an occasional crosscut with decent results, I’d suggest the Forrest 30T WWII. The LM72/LU87 are 24T FTG bulk rippers….they’ll rip very efficiently, but are likely to crosscut poorly due to the flat top grind….same is true of the Infinity 010-024/010-124 FTG rip blade.

If you don’t need to rip up toward 3”, a decent 40T general purpose, or 50T combo blade will rip well to around 1.5”, and will do a credible job with crosscuts and ply. I like the Infinity 50T Combomax a lot, but the Ridge Carbide and Tenryu Gold Medal blades are excellent blades for less than a Forrest WWII 40T. If you don’t want to spend that much, the Diablo blades are a good value, as are the CMT ITK Plus series, but I’d lean toward the Irwin Marples in that same price range….they have a bit larger carbide and similar value/performance.

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

View Redoak49's profile

Redoak49

3522 posts in 2131 days


#3 posted 12-17-2017 04:39 PM

I use both thin and regular kerf blades on my Sawstop PCS and really do not notice a difference.

I use a rip blade, a premium cross cut blade and a 80 tooth plywood blade. I use the rip blade for most general woodworking. A combination blade is just that….not perfect for rip or cross cut but somewhere in between.

View Carloz's profile

Carloz

1147 posts in 734 days


#4 posted 12-17-2017 04:46 PM



If I were you, I would buy a good quality combination blade. You may not recognize it now but rip blades do a very poor job of cross cutting by comparison.

- ArtMann


It might depend on the material you cut, I mostly use hard maple and could not notice a slightest difference in crosscut quality between 60 tooth and 24 tooth blades. Both are mirror like with no swirl marks whatsoever. That is why, after a while I stopped bothering switching to the crosscut blade.

View Knockonit's profile

Knockonit

454 posts in 344 days


#5 posted 12-17-2017 04:48 PM

I”ve been using a 60 tooth, for almost a year now, lots of hard maple, walnut, hickory gone thru it, its a cmt product, thin kerf, not a whole lotta sanding to get machine marks out of it, although the maple tends to burn, but all else is burn free.
rj

View hairy's profile

hairy

2764 posts in 3674 days


#6 posted 12-17-2017 07:12 PM

I’m real happy with this one.

https://www.ebay.com/itm/Freud-LM72M010-10-x-24-Tooth-Flat-Carbide-Industrial-Rip-Blade-New/322324602009?epid=1871058420&hash=item4b0c0b1c99:g:sZIAAOSwB3BaAgRM

I’ve also had good results cutting BB plywood with it.

-- My reality check bounced...

View Carloz's profile

Carloz

1147 posts in 734 days


#7 posted 12-17-2017 08:50 PM

Its strange as this blade is designed for ripping 3/4” to 3” wood i.e. The least suitable blade for cutting plywood.

View RDan's profile

RDan

79 posts in 2466 days


#8 posted 12-18-2017 12:26 AM

I would recommend the Freud Fusion, I recently mounted it in my PCS. I have been doing some ripping, cross cuts and resawing with it and so far am impressed. I have the thin Kerf, but would most likely go with a full Kerf if buying again. I have a thin Kerf because I used to have a C-Man contractor saw. I was working some reclaimed Redwood decking I had salvaged. First runs I turned off the safety to run it through. I have not put my Forrest or Systimatic on yet, so I cannot compare yet. Dan

View alittleoff's profile

alittleoff

541 posts in 1419 days


#9 posted 12-18-2017 01:48 AM

I’d go with a Freud thin kerf if I were you. I tried the Forest full kerf WW2 and it’s hanging in my shop hardly ever used. If I use it, it’s only for doing a narrow inlay or something like that. I went back to Freud bought 2 last week, a ripping and an 84 tooth from Amazon.
Gerald

View rwe2156's profile

rwe2156

3088 posts in 1623 days


#10 posted 12-18-2017 02:10 PM


It might depend on the material you cut, I mostly use hard maple and could not notice a slightest difference in crosscut quality between 60 tooth and 24 tooth blades. Both are mirror like with no swirl marks whatsoever. That is why, after a while I stopped bothering switching to the crosscut blade.

- Carloz

My experience of 25+yrs is just the opposite. I don’t know of any 24 tooth rip blade that can be used for xcutting, especially if its a flat top grind. Sure, a brand new 32T glue line rip can give pretty amazing xcuts, but the quality declines rapidly as the teeth get dull.

I disagree on the combo blades. OK for general cutting, but they do not excel at either.

If you are trolling for blades ;-) IMO these 3 blades will serve you well. : 60-80T, 24T flat top, and a glue line rip. I’m a CMT guy, but the Freud LM74M010 is an excellent blade. I’ve used it for 2” stock and its fine.

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

View gleasoncraftworks's profile

gleasoncraftworks

30 posts in 1376 days


#11 posted 12-18-2017 02:33 PM

I have used the Irwin Marples 50T 10” ATB blade on several different saws over the last several years. It gives me a flawless cut—to the point where sanding is superfluous. It says it’s made in Italy (where all the good blades come from, dontcha know?). I know there are “better” blades on paper (knotscott above named a couple), but I honestly can’t see how this blade has ever let me down to the point where I would see a return on investment by spending significantly more money. For convenience, they are available at Lowe’s:

https://www.lowes.com/pd/IRWIN-Marples-10-in-50-Tooth-Carbide-Circular-Saw-Blade/3817511

FWIW, I do not swear by Diablo/Freud blades. I think that they are, by far, the best blades that Home Depot carries…but does that really say much?

View ArtMann's profile

ArtMann

1078 posts in 958 days


#12 posted 12-22-2017 11:32 PM

Your assessment is different from that of most woodworkers of any skill that I know. I can prove what I am saying is true on Maple or any other wood any time I feel like it in my own shop.

If I were you, I would buy a good quality combination blade. You may not recognize it now but rip blades do a very poor job of cross cutting by comparison.

- ArtMann

It might depend on the material you cut, I mostly use hard maple and could not notice a slightest difference in crosscut quality between 60 tooth and 24 tooth blades. Both are mirror like with no swirl marks whatsoever. That is why, after a while I stopped bothering switching to the crosscut blade.

- Carloz


View pintodeluxe's profile

pintodeluxe

5757 posts in 2955 days


#13 posted 12-23-2017 12:00 AM

TK Freud LU86R010 40 tooth general purpose blade. It will crosscut much better than the 24 tooth ripping blades, but still rips well.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

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