Uneven dado - Router Forums
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post #1 of 2 (permalink) Old 12-18-2009, 03:47 PM Thread Starter
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Join Date: Dec 2008
Country: United States
First Name: Larry
Posts: 19
Question Uneven dado

I recently wanted a 3/4" wide by 1/2" deep dado. I installed a 3/4" bit in the table-mounted router, positioned the fence where I wanted and ran the piece through. The dado came out fine except the following: The bottom of the cut was about 1/16" higher on both sides than in the middle of the cut. The middle of the cut was 1/2" as desired but the depth on both sides was about 7/16". I think the speed was set at 15k rpm. I had to chisel out the rest to make the dado even at the bottom of the cut.

Any ideas about what went wrong?
fishin&routin is offline  
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post #2 of 2 (permalink) Old 12-18-2009, 04:16 PM
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Join Date: Sep 2004
Country: Canada
First Name: Wayne
Posts: 98

There is a few reasons for this. 1- the size of the peice, you didn't mention the size and the bigger the peice the harder it is to apply pressure on the board. The ply could be cupped. 2- did you use feather boards to keep constant downward pressure on the board. My preferred method for this is to use the router hand held with a guide. I will cut rabits and grooves on the table but I use feather boards to keep pressure on the board.
Hope this helps
waynoe is offline  

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