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When it comes to circ saws, one blade is as good as another, right?  Not according to Irwin. They recently announced a new Marathon WeldTec blade series which includes improved carbide teeth and welded — instead of brazed — teeth.  The bottom line: Irwin claims the new WeldTecs are 70% tougher and last 50% longer than their old ones.

The WeldTec’s stronger carbide teeth are less likely to break or chip, but what’s really interesting is the new blade’s namesake: its welded teeth.  On standard blades, teeth are attached via a brazing material that acts like a “glue” to join the carbide tooth to the plate.  This makes for a good bond, but it softens as heat builds during a cut.  If the blade gets hot enough, the tooth can come right off.

The new Marathon WeldTec blades are welded instead of brazed to the plate.  This results in less tooth loss because the weld is less susceptible to heat than brazing material.

The greater tooth durability and the new welded teeth result in a longer lasting blade, Irwin says.  We can’t wait to give one a shot and see for ourselves.  Now we’ll just have to see if the price point will put them out of reach for the everyday buyer.  Look for them on shelves soon.

Marathon WeldTec Blades [Irwin Tools]


3 Responses to Preview: Marathon WeldTec Blades

  1. AZ_Engineer says:

    The blade gets hot enough for the braze bond to fail, really? Sounds like marketing hype to me. When brazing steel, you need to get it pink hot. I doubt the blade would have to get that hot, but it would certainly have to get to several hundred degrees for a braze bond to fail. Certainly hot enough to flash boil water drops on the hot blade and I’ve never seen a blade that hot.

    Now if you were trying to cut steel…………………..?

  2. Kurt says:

    I’m kind of with AZ_Engineer. Maybe it’s my lack of experience, but I’ve never had a blade failure. Blades get dull before they fail. Or if they fail, it’s because I abused the blade in some fashion.

    Do others regularly experience blade failures in circ saws? Or table saws?

  3. Mike says:

    I have had blade failure where one of the teeth has come off (I still have the sharp “23” tooth blade made by SKIL still hanging on the wall for when I am cutting ugly scrap or OSB), the tooth was lost when cutting OSB and only maybe a total of 2 hours worth of cutting. You don’t notice until you are trying to drive the saw through wood and it requires more force than what it usually does. I’ll try the Irwin out as soon as it comes out as my circular saw is always being used.

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