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Discussion Starter · #1 ·
Doing a search here on the forum I came across this old post showing a DIY small dia. circle jig that may work for me! Router Forums - View Single Post - Small diameter circles.

I have a Bosch 1617/1618 EVS combo with a RA-1054 edge/circle guide, Just wondering if anyone has made an adapter (like pictured in the linked post) for the RA-1054 to make smaller than 4" dia circles?

Doug
 

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If you are talking about making the hole all the way thru, I just use a hole saw.
 
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On the few occasions where I needed to route circles smaller than 4 inches, I would do this. Set the router circle jig to make (for example) a six inch circle and cut that out of a piece of stock. Throw the circle away and use the remaining/resulting "donut hole" as an edge guide. Put the router inside the donut hole and follow the inside edge. You can get as small a circle as you can do the math for by making your own circular edge guide. Did I explain that okay?
 

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Discussion Starter · #5 ·
Put the router inside the donut hole and follow the inside edge. You can get as small a circle as you can do the math for by making your own circular edge guide.
Yeah that could work, As long as I could figure out the math needed correctly.:unsure:

I would need to figure out three different size patterns, One for the inside radius, One for the outside radius, Then one for the matching radius groove.:confused:

Doug
 

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Are you one of us who bought a CRB7 jig? These are similar to the one in your link, but can do many other things as well. Since I have a CRB7 I would use it instead of making one. The Jasper circle jigs are also very handy for cutting circles of many sizes with a router.

Charley
 
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