Reply by William Shelley

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Posted on Fixed-width dado / slot cutting blades for table saw?

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William Shelley

609 posts in 2320 days

#1 posted 10-20-2017 07:13 PM

Not change the subject, but where do you find plywood that is exactly 1/4” thick. The last stuff that I bought was on 3/16” thick and my dado blade only does 1/4” and wider. I need to used a flat top rip blade and do two passes moving the blade over 11/16” for the second pass. It s not that much work if you do the first cut on all the boards and them move the fence and do the second cut on all the boards.

For thicker plywood, you can get a dado set with a 3/32” wide insert so you can do 15/32” or 23/32” to fit the thicker plywood with no fiddling.

- theotherken

There’s a lot of variation in US plywood thickness even for the same type and grade from different vendors, or even different lots.

I think baltic birch should be quite a bit more consistent though. Same, hopefully, with ApplePly. Part of what you’re paying extra for is the higher quality of the product e.g. no visible knots, minimal footballs, and consistent thickness and panel sizes.

My 1/2” router bit set from Yonico came with straight cutters for making dados with a router to accept the common 1/32-undersize plywood thicknesses, but I haven’t used them yet.

-- Woodworking from an engineer's perspective

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