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flat bottom cutting saw blades

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Forum topic by HokieMojo posted 80 days ago 88 views 0 times favorited 4 replies Add to Favorites
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HokieMojo

414 posts in 264 days


80 days ago

Maybe someone who owns moer sawblades than me can help me with a question about the difference between the flat bottom blades vs. the ATB blades. I see that forrest sells a blad that will give flat bottomed cuts. I thought this could be handy when cutting tenons and groves for mitre keys.

What I’m wondering is whether the cut would be inferior to the regular WW2 blade when it comes to regular cuts. I’m thinking that if I can only afford one (even that is a stretch at the moment), would it make more sense to get the blade ground for flat bottom cuts?
Thanks for any input!

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Llarian

37 posts in 144 days


80 days ago

If you get a WW2 ground for flat bottomed cuts, you’re going to lose most of the benefit of its being a WW2.

I use a high quality rip blade for flat bottomed cuts typically. Not sure if its orthodox, but if I need to have a flat bottomed crosscut, I’ll hit it first with my ATB crosscut blade just under depth, then make one more pass with the rip blade to clean out the bottom of the cut.

-D

-- Dylan Vanderhoof - New woodworker in training. =)

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Bob #2

2081 posts in 558 days


80 days ago

Can I ask why you would need such a cut? (Brain freeze today;-))
Neither of the examples you suggested would show after assembly.

I’m assuming 1/8” kerf?

Bob

-- A mind, like a home, is furnished by its owner

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HokieMojo

414 posts in 264 days


80 days ago

Ok,
I think I’m showing my lack of experience. sometimes I see on new yankee workshop norm will cut part of a tenon (shoulder part i guess?). rather than set up a tenoning jig to hold the stock upright, he will occasionally just move the piece a fraction of an inch to the side and cut again. Then repeat until the material is removed. I’ve done this with my curent blade, but it leaves lots of little ridges that need a lot of cleanup with a chisel.

As far as how to use these blades to make keyed mitre joints, maybe a picture will be worth 1000 words.
Here href="http://lumberjocks.com/projects/3094">Click for details was a really nice example. I hope this helps.

Dylan,
From the sounds of your explanation is sounds like having the alternating teeth is part of the key to a good cut. I was hoping that it only marginally contibuted.

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Bob #2

2081 posts in 558 days


80 days ago

I was thinking you wanted to do these:

Sorry for the conlfusion.
I do my keys with the router.

-- A mind, like a home, is furnished by its owner

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