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Tool Talk Discussion Forum

cut-off saw blades

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firhead

10-11-2018 19:35:03




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I have an inexpensive cut-off saw that takes a 14" blade. I'm cutting 3/16" and 1/4" angle iron and channel with it, but the blades that I bought with it seem to be flexing a lot. At the hardware, I recently saw what appears to be thicker blades, and I saw a designation on one that says "Type 1". I've got a one inch arbor. The salesman at the store didn't seem very knowledgeable about these blades, and was happy he a least made sure I didn't get a masonry one - not much help beyond that. I would appreciate a little guidance here. Thanks.

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Texasmark1

10-18-2018 14:22:29




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 Re: cut-off saw blades in reply to firhead, 10-11-2018 19:35:03  
Millwaukee is the brand HD carries and buy them in Bi-metallic. I will never buy another saw blade (excluding radial saw blades) that isn't bi-metallic. I have 2 band saws, both with them and included varying tooth dimensions (like varies from 18-24 TPI) in the requirement and I have had them so long I forget just when I purchased them. Still cut like a dream.



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MJMJ

10-15-2018 07:46:34




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 Re: cut-off saw blades in reply to firhead, 10-11-2018 19:35:03  
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My neighbor has one for his fab shop. I have one too though I obviously don't use mine near as much as he does. Blade longevity has been fine. Cut speed slows down slightly as the blade wears, but it's minimal. I've yet to change mine, though it's not quite been a year yet. He's had no problems either, except I think he said it broke some teeth cutting aluminum. It's not the best for real thin materials, or basically anything the teeth might grab. For example cable or chain is best cut with an abrasive wheel, so I still use my angle grinder for those. For clean, fast cuts through metal stock, it's by far the best option. Including a plasma cutter, which is really only good for plate.

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Mule Meat

10-12-2018 14:40:32




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 Re: cut-off saw blades in reply to firhead, 10-11-2018 19:35:03  
MK Morse Metal Devil



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DoubleO7

10-12-2018 08:34:55




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 Re: cut-off saw blades in reply to firhead, 10-11-2018 19:35:03  
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But not too slow or you will glaze the wheel.

Abrasive saws have a "sweet spot" as far as pressure applied to the work piece.



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Dr. Walt

10-12-2018 06:51:33




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 Re: cut-off saw blades in reply to firhead, 10-11-2018 19:35:03  
The most common problem of blade flexing is actually due to operator error. You're in a hurry to get the parts cut so you try to force the blade through the steel. Remember, the blade is actually GRINDING the steel away to make the cut, it's not like a saw blade that cuts the steel away. Only apply enough downward pressure to allow the blade to do it's job.



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MJMJ

10-12-2018 06:08:54




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 Re: cut-off saw blades in reply to firhead, 10-11-2018 19:35:03  
If you cut enough steel, it pays to buy one of these. Cuts cleaner, cooler, almost no sparks, and in about 1/4 the time.



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504

10-12-2018 18:01:27




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 Re: cut-off saw blades in reply to MJMJ, 10-12-2018 06:08:54  
We sell one about every week, they are holding up very well.



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Geo-TH,In

10-12-2018 04:21:35




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 Re: cut-off saw blades in reply to firhead, 10-11-2018 19:35:03  
I have a 14 inch dewalt cut-off. I use dewalt blades. Never noticed blade flexing. I don't force it, let it make sparks and take it slow. Only use cut-off on harden steel. I like using metal bandsaw. It too is slow but makes a very clean cut.



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cwtech

10-12-2018 04:01:49




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 Re: cut-off saw blades in reply to firhead, 10-11-2018 19:35:03  
Click the link.



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Stephen Newell

10-12-2018 04:01:41




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 Re: cut-off saw blades in reply to firhead, 10-11-2018 19:35:03  
The thicker blade would be better but if you cut very much steel it would be a lot easier on you to use a metal cutting bandsaw.



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MJMJ

10-12-2018 03:43:21




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 Re: cut-off saw blades in reply to firhead, 10-11-2018 19:35:03  
I would agree. Thicker isn’t better when it comes to abrasive cut off wheels. Clamp the piece tight and square.



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Butch(oh)

10-12-2018 02:08:57




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 Re: cut-off saw blades in reply to firhead, 10-11-2018 19:35:03  
Most of those cheap cut off saws don't have enough power to pull the thicker blades and work best with the thin ones designed for them. The thick ones are for industrial electrical driven units with 5 HP or more and gasoline powered portable saws. I would guess that your blade flex issue is actually an issue with the work piece moving or when making cuts at an angle you need to ease the blade into the work starting a groove, otherwise the angle will cause the blade to move sideways before it begins to cut resulting in what you describe.

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firhead

10-12-2018 19:03:04




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 Re: cut-off saw blades in reply to Butch(oh), 10-12-2018 02:08:57  
OK - thanks all for the input. Sounds like cutting is what I'm looking for. Won't miss that dust.



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Butch(oh)

10-13-2018 05:17:40




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 Re: cut-off saw blades in reply to firhead, 10-12-2018 19:03:04  
I got rid of my chop saw due to it covering everything in the shop with black dust. I had one of those Evolution carbide saws for a while and got rid of it too as the cost per cut is real high no matter how careful you are when using it. Now I have a 7x 11 band saw and between that, a plasma cutter and a torch set I am satisfied,,, finally, LOL.



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firhead

10-13-2018 19:38:38




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 Re: cut-off saw blades in reply to Butch(oh), 10-13-2018 05:17:40  
OK Butch (OH).....you mention cost per cut relative to carbide blade Evolution. In my situation, I get into a project maybe once a month that involves 30 or so cuts of smaller angle, channel, etc. Am I going to be going through 100 dollar blades with regularity? No production shop here, but I would appreciate cleaner more precise cuts without getting black lung that I think I'm getting now. I'm gathering that the cut quality is much better with the cold blade. Plasma cutter is a dream (......$$?).

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Butch(OH)

10-15-2018 09:37:00




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 Re: cut-off saw blades in reply to firhead, 10-13-2018 19:38:38  
MY experience with the Evolution saw was not good. Yes they cut clean and fast when the blade is in good shape. I bought mine maybe 10? years ago at their Farm Science Review booth when they first came out. I had a 16' landscape type trailer to build and it took 3 blades to get everything cut and I was VERY careful about how it got ran. My shop is part time too but over the period of a year and maybe 20 blades it figured out close to almost $.75 per cut on the average. It was fast and clean or it would have been shelved a lot sooner than it was. One of my helpers screwed a brand new blade up in a 1/2 hour on the 3-4th cut. At the time I bought the blades at Lowes because they were a dealer, close and cheapest source. Went to get a new blade once and everything Evolution was gone, saws, blades accessories everything. I asked the manger what was up and he said too many brought back for same problems I was having, Lowes ordered them pulled from the shelves. I gave mine away and the guy who got it later sarcastically said, thanks a LOT buddy! I do have a hand held 8" Milwaukee metal saw and I like it for certain uses. The blade runs much slower than the Evolution saws did and has reasonable life. All that being said I have no interest in a peeing match with the other poster, maybe they improved the saw or the blades or both? cant say but I have never been sorry for biting the bullet and upgrading to a medium grade 7x11 band saw. Good luck with whatever you try!

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