Originally Posted by Josh Wahlie
I've just noticed from a few other tutorials that don't mention the simple things like grain direction & saw blade depth importance. I hope this helps anyone wanting to learn.
That's because it doesn't matter. It's plywood, not solid board. I've done countless radial bends in both grain orientations, makes no difference. The top (Finish) veneer is simply decorative, thin as card-stock paper. The core layers are all perpendicular from each other.
Also, there is a formula for kerf-cutting to achieve different radius'. Not simply just doing 3/8" O.C. every time.
1. Take the outside perimeter of the radius and subtract the inside radius perimeter. That tells you how much you remove.
2. Take the amount from step 1 and divide it by the thickness of the saw blade (kerf). That will tell you the number of cuts you are to do.
3. And for the final step you simply, take the outside perimeter of the radius and divide that by the number of cuts. That will give you the distance between your cuts.
I hope this helps you to teach people the proper way of doing things.
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