Gary:
Son and I are building a pair of oak counter-tops. Each has a radius on one corner (the corner in traffic) for safety as much as appearance. Each also has a bullnose. For design reasons, we prefer to have the inside edge of the bullnose (where it meets the countertop) to be radiused rather than meeting at right angles. The actual radius of the circle itself will be about 6″ on the outside (more or less), and the bullnose will be about 2″ thick. So we are faced with cutting three radii — the outside bullnose, the inside bullnose, and the countertop where it mates with the inside of the bullnose.
What is the best way to get clean, concentric, nested curves?
Of course, we will also need to mate up the outside curve with the straight edges of the bullnose, so, in addition to the procedure for the radii, is there a procedure and sequence for the outside edges?
We are using a router, not hand tools.
Cheers!
Joe
Edited 11/25/2007 10:14 am ET by Joe Sullivan
Replies
Hi Joe,
I don't understand that inside radius as in my mind it becomes a debris catcher but here goes on the concentric circles.
If you have an adjustable circle cutting jig, I think it's easiest. Make up a template first for the inside Radius. Cut that with your router and the circle cutting jig. The distance from the center point on the jig to the inside cutting edge of the bit will be R. This will cut the outside radius or convex cut.
The matching radius cut, the concave cut, is done with R now being equal to the distance from the center point of the jig to the outside cutting edge of the cut. Adjust the circle cutting jig to make the matching cut. I hope this helps. Gary
Yes, it does make sense, and is easier that the template approach I was considering.
What we are trying to do is cut curved bull noses to fit on the ends of kitchen counters, and for design purposes, we don't want the bull nose to be attached at a 45 degree angle and just rounded on the outside. We want the strip of oak to flow roundly around the round corner. So, the end of the counter top will have to be radiused. That is radius A. The inside edge of the bull nose will have to mate up precisely, for radius B. The outside of the bull nose is radius C.
There won't be any debris catching, because the joint between A and B will be smooth and flat.
I do have a circle jig hanging on the wall(came with the Triton, but have never used it), and can do as you suggest by telescoping the jig in and out.
Thanks.
Cheers and Merry Christmas
Joe
J
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