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Thin kerf saw blades for circular saws. Alternate top bevel, .063" plate, .087" kerf, 12 degree hook angle.
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This Hitachi Hardi-Blade Circular Saw Blade has a 10-inch diameter and is made for use with most 10-inch miter saws. This blade has a 5/8-inch arbor, and its special 6-tooth design provides precise, dust-reducing cuts. The blade's highly durable polycrystalline diamond tips provide 5 times longer cutting life than other diamond-tipped blades and 30 times longer cutting life than traditional carbide blades. The polycrystalline diamond tips also have self-sharpening properties. This blade is ideal for ripping, crosscutting, and mitering in fiber cement boards and siding. This product is backed by a 5-year limited warranty extended to the original purchaser.
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why so expensive?
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This thing works ok. It is hard to believe it reduces the amount of dust created, as dust is blowing out of the back of the saw as if that were purpose of the operation. It does cut fiber cement siding crisply and repeatedly. My 7" blade cost $6 and this costs $60, they both work equally well. Go figure!
Rating: 
(3
out of 5) @ 2008-08-26
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Hitachi 10-in Hardi-Blade
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I am not a professional builder, but I have re-sided one house and recently completed re-siding a portion of my current house with HardiBoard. Previously, I had used a standard "diamond-edged" saw blade, but wore it out quite quickly on HardiBoard. This blade worked exceptionally well, ripping and cross-cutting through HardiBoard like a "hot knife through butter". It claims to be "dust reducing", which perhaps it was a little bit, but it still kicked up a significant cloud of dust. You will still want to use an appropriate face mask.
Rating: 
(5
out of 5) @ 2008-07-07
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This blade is amazing
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We cut miles and miles of Hardi material using this blade. I'm on my third blade now, but have been totally impressed by how long each blade lasts. We find it's best, or most efficient,to cut 4 or 5 thicknesses each pass. We tried 6, but it felt too hard on the saw. This was using a compound miter saw. We were cutting individual shingles from a big stack of hardisoffit material that was 12 ft long, 4 ft wide, and stacked 4 ft tall. Thousands and thousands of shingles, each shingle 10 7/8" long, so as to get 13 shingles from each 12-ft board length, and varying in width from 4" to 10". Anyway, the Hardiblade is a fantastic blade and I can't imagine doing it any other way. The cut edges of each shingle only needed a light pass with sandpaper to get the shingle ready for primer and paint.
Rating:
(5
out of 5) @ 2007-10-19
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Hardi-Blade
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Excellent product. I had tried a standard carbide blade when I started my siding project. In no time at all, it was burning on the cuts. Don't waste your time and money on a regular carbide blade. This blade was money well spent.
Rating:
(5
out of 5) @ 2007-05-08
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Hitachi 10 inch fiber cement saw blade
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This is a great tool for cutting cement siding. I use mine in my radial arm saw and get very smooth cuts. With the radial arm saw I can cut the widest planks. The dust is much less than cutting with a regular carbid blade. I also use the 7 1/2 inch blade in a circular saw for rip cuts. I am also using Malco Plank Gauges for holding the planks during installation and they are very helpful.
Rating: 
(4
out of 5) @ 2003-09-22
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