Replies

1. 
   Jamie_Buxton | Aug 07, 2008 03:58am | #1

   One way would be a slot-cutting bit in a router.  Most slot-cutters are sold with a bearing which would result in a deeper slot that you want, so you'd need to put a larger bearing on it.  You would also need a method to hold the disc while you work on it.   Double-stick taping it to your workbench is one method.

1. 
   SenorDorado | Aug 07, 2008 03:09pm | #5

   Thanks to all of you that posted replies to my query. I thought of the slot cutter method but didn't know about the bearing issue. Now that 2 of you brought it up, I'll have to do some ciphering and move onward. As for the mounting/clamping issue I'm thinking that a wedge and bench vice with dogs set at a relatively low position should work. Double stick tape would be an extra added precaution. Then use a small trim router with a slot cutter. Trial and error with dry runs come to mind. I also thought of the table saw, but the concept just seemed too open for mishap. Thanks and I'll get back to ya with results. Senor Dorado

1. 
   oldusty | Aug 07, 2008 03:55pm | #6

     Senor D ,

               Whether you do it with a router table or the TS I would make a Vee block with the saw blade / slot cutter protruding just enough to make your depth as you rotate the circle , piece of cake .

                   dusty

2. 
   douglas2cats | Aug 07, 2008 03:59am | #2

   You could do it with a slot cutter bit in a router but you'd have to get an extra big bearing to get the depth to be 1/16" and safely holding this is a whole nuther matter. For the shallow depth you're going and  for something that small I think my first choice would be a hand tool - something like the Lie Nielsen Bronze beading tool.

   If you build it he will come.

3. 
   RalphBarker | Aug 07, 2008 04:38am | #3

   I'm unclear on whether the groove is on the face of the circle, or the edge. Either way, absent a lathe, I'd use a router, as others have suggested. You'd either need to build a jig (an over-sized circle, the diameter of which would locate the circle in relation to the edge of the router base plate) or use an edge guide on the router. Instead of the usual flat edge guide, you might consider augmenting that with a corresponding arc the same diameter as the the circle.

4. 
   brucet9 | Aug 07, 2008 04:59am | #4

   This looks like a simple task for a table saw. You would be taking so little material off that there would be negligible risk.

   I think I would install a high tooth-count 1/8" kerf blade and raise it to 1/16" depth, set my fence to 7/16", and roll the circular workpiece over the center of the blade.

   BruceT