I've looked around the web for a combination of a core box bit and a tapered bit. I want a radius in the base but a 3 or 5 degree taper up the sides. I'm looking for a 1/4 or 3/8" radius. It is a upside down trapezoid with radius on bottom corners. 1 to 2" depth.
This is for making a boat hatch pattern/plug. For cutting out the gutters. The material being cut is foam.
I know I could use various other bits to do the job but a single bit would be simple and make a cleaner cut.
If you've already cut the gutter, the Amana bit I suggested earlier will cut the taper for the sides...
Alternatively, you can resin/glass the taper you want and not go for the bit...that's what I've done with mine for repair. I took the hinges out and lift the whole hatch as it did not open enough (under the ladder to flybridge)
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