I'm about to work on my first project with dado joints. Is there a formula or guidelines to determine the dimensions for the dado and rabbet joints?
I'm about to work on my first project with dado joints. Is there a formula or guidelines to determine the dimensions for the dado and rabbet joints?
I typically will not remove more than 1/3 thickness in depth.
Bumbling forward into the unknown.
If I am working with 3/4" material. I try to have the dados about 1/4".
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Dados are about a third the thickness of the material the dado is cut into. Harder, denser material can be less.
Rabbetts are somewhat subjective based on design. The "classic" would be half the thickness. In other words the rabbett for 4/4, or 3/4" would be 3/8"x3/8". Again though, this is only the beginning, and probably how most folks learn to cut their first rabbetts.
"The first thing you need to know, will likely be the last thing you learn." (Unknown)
I make all my dados 3/8 in 3/4 wood including all rabbits.
Don
For a 3/4" wide board, I would make a 1/2" wide dado. The shoulders would be 1/8" either side. As Brian mentioned, 1/4" deep is sufficient. You do not want to remove strength from the main section by cutting too deeply.
Regards from Perth
Derek