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post #1 of 19 (permalink) Old 10-16-2018, 11:10 PM Thread Starter
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I bought an 80 tooth 10 inch saw blade for 2 bucks today at a thrift store.
I figure people with routers have saws, so what a better place top ask a question. The blade has 4 expansion slots in it. I haven't seen this shape before. The slots are sorta like a funky elongated anchor.
The teeth alternate between a flat face and a three angled shape. The blade feels fairly sharp and appears to be a high quality blade. The brazing on the teeth is very nice. It's a heavy blase not a thin kerf.

Anyway, I have two questions.
Who makes this blade? I figure the shape of the slots would tell.
What would be the ideal use for it?
I don't know how to measure the tooth angle or rake, but it's not aggressive.
My sketch shows just one of the 4 expansion slots.
I'm sure a blade like this would be a bit spendy to have sharpened. The only use I have for it is my chop saw.
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Last edited by ranman; 10-16-2018 at 11:14 PM.
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post #2 of 19 (permalink) Old 10-16-2018, 11:39 PM
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what color is the blade???

.
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File Type: pdf SAW BLADES.pdf (374.9 KB, 74 views)
File Type: pdf SAW BLADES 101.pdf (280.4 KB, 62 views)
File Type: pdf GS_anatomy.pdf (183.9 KB, 52 views)
File Type: pdf BLADE HOOK ANGLE.pdf (375.0 KB, 60 views)
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post #3 of 19 (permalink) Old 10-17-2018, 12:30 AM Thread Starter
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No color, just shiny metal, an almost polished look. There is a mat gray (not painted) metal color for 3/4" around the rim. The color is anodized or etched to give it that dull gray appearance.
HM 12 is stamped on the blade but the stamp may not be a factory marking, but it's a 10 inch blade, not 12.
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post #4 of 19 (permalink) Old 10-17-2018, 01:15 AM Thread Starter
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Good info Stick. Never used a radial arm saw. Dad had one but the way they cut always made me nervous. Blade descriptions for what NOT to use in a radial arm saw makes them seem a lot safer to me now.
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post #5 of 19 (permalink) Old 10-17-2018, 01:27 AM
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HM means - HEAVY DUTY METAL


Triple Chip Grind; -2° Hook see Saw Blade Codes in the last of Sticks pdf's. It is a metal cutting blade.
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https://www.amazon.com/s/ref=nb_sb_n...ular+saw+BLADE

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post #6 of 19 (permalink) Old 10-17-2018, 01:54 AM Thread Starter
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It's not a negative. I'm gonna guess 12 to 15 degrees. I don't see what you saw in those PDF's Herb. I do see a reference to "hard materials" as far as the HM .....maybe 12 is the angle?
It is stamped HM 12

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post #7 of 19 (permalink) Old 10-17-2018, 08:51 AM
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Don’t use it on a chop saw with that much positive rake. The positive rake wants to lift the board off the table. Chop saws should be at most plus two and better if they are negative.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #8 of 19 (permalink) Old 10-17-2018, 10:54 AM Thread Starter
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Why don't they put that info on blades? You, know one of those "good better and best" charts on the back of tha package. I'll bet very few contractors know that. My own chop saw logic always told me not to use a rip blade, so I just used blades with lots of teeth and labeled for fine cutting.
About that stamp in the blade, HM 12.
My brother told me years ago, the saw sharpening shop he went to used to stamp his blades with his account number. Could that be what the marking is, or do you think its a blade use and tooth angle> Looking again with the tools I have, it looks to be 10 to 12 degrees if I'm measuring correctly.
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post #9 of 19 (permalink) Old 10-17-2018, 11:00 AM Thread Starter
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My chop saw isn't a cross slide. It's an antique (1990's) Makita.
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post #10 of 19 (permalink) Old 10-17-2018, 12:48 PM
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Randy, can you take a picture of the blade and post it? If you can, a shot of the whole blade and a close up, as best you can, of the teeth.
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