New Saw Blade for Sawzall (Updated)

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About: I have always like building... now I have the skills and equipment to do some really cool stuff.

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I was needing a way to cut a 0.75" channel in some plywood. The usual way of cutting two lines and then chiseling out the middle... I don't like.
So I thought and thought and eventually came up with this....

The idea is a dado blade for a sawzall.

So I got three used sawzall blades (the one in the saw is a thicker metal cutting blade. the others are the big toothed ones for aggressive wood cutting) and cut one into 1.5" chunks. Then very carefully lined the two outside blades up so they are 0.75" apart. and welded the cut pieces into place.

the teeth are all going in the same direction and the blade chunks in the middle will clean out what the side blades can't.

And it works!!! I was so amazed.

First tweek: the two side blades need to hit the wood first then the middle pieces come next. I have them all working on the same level at the same time. This way the sides will guide the middle in and it won't move side to side as much.

Update: Turns out they already have something like this... at my local hardware store. I was shocked. I like mine better.

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    11 Discussions

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    Tex Arcana

    5 years ago

    AWESOME HACK!!! Now to go make one before some corporation steals it and sues everyone

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    Robot Lover

    5 years ago on Introduction

    This is a great idea! This could also be used as a hand file. It might even be good for shaping foam.

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    jarikcbolpclplante

    Reply 6 years ago on Introduction

    no joke, i can imagine seeing this sucker in the hardware store for sale at 15$ a blade.

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    you should grab some video of this hack-tool you have established, I would love to see how quickly it removes material.

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    rusty90

    6 years ago on Introduction

    Neat quickn'dirty hack! My guess is that the same could be done with pop-rivets, just bending the center blade into a zigzag, drill at the vertices and where they contact the sides, then rivet. Additional bonus, the temper of the blades will be less impacted by the drilling and bending than by cutting and welding, thus less likely to shatter.

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    heathbar64rusty90

    Reply 6 years ago on Introduction

    Good point about the temper, but have you ever tried drilling one of those blades? Aint gonna happen! Perhaps you could re temper the whole thing once it's done.

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    RangerJ

    6 years ago on Introduction

    I like it. I'm sure I will be making one the first time I need to do some dadoing.