Router Forums banner

Going in thin circles

1K views 6 replies 4 participants last post by  Liquid 
#1 ·
Hey everyone,

I have a minor technical dilemma that I thought the gurus might be able to solve faster/better than my poor failing noodle:

I have some very nice (11 ply teak, no voids in plys) 3/4" plywood off cuts that I want to take some thin circles out of to dress the mahogany pillars on a fireplace surround. They need to be 10" inside diameter. I have cut many circles in my time, but here is the kicker: I want to take only about a 3/8" 'slice' out to surround the pillars with the veneer layers showing; in other words I need the circle to be 10" id, and 10 3/4" od.

Cutting the 10 3/4 circle is no problem, but any suggestions on how to lose the inside without losing my hair? Any suggestions would be highly appreciated. I have a pretty decent shop, so tool aquisition is not really a problem. Thx,

R
 
#2 ·
Hi R

What ?,, are you saying you want to cut some rings out that are 10" ID and with a 10 3/4" OD ,out of some nice plywood .. ? that are 3/8" thick.

========
Hey everyone,

I have a minor technical dilemma that I thought the gurus might be able to solve faster/better than my poor failing noodle:

I have some very nice (11 ply , no voids in plys) 3/4" plywood off cuts that I want to take some thin circles out of to dress the mahogany pillars on a fireplace surround. They need to be 10" inside diameter. I have cut many circles in my time, but here is the kicker: I want to take only about a 3/8" 'slice' out to surround the pillars with the veneer layers showing; in other words I need the circle to be 10" id, and 10 3/4" od.

Cutting the 10 3/4 circle is no problem, but any suggestions on how to lose the inside without losing my hair? Any suggestions would be highly appreciated. I have a pretty decent shop, so tool aquisition is not really a problem. Thx,

R
 
#4 ·
Richard,

I'd make a shot at repeating what I've learned from BobJ about this but in lieu of my misspeaking, I'll save it for BJ's response. He's got it down to a science and can tell you how to make a jig to do it that will surpass any jig I've seen on the market.
 
#6 · (Edited)
Plus one on the Jasper jig,but they have a down fall, the mounting holes like to snap out easy,but it's a easy fix by drilling out the center hole to take on the brass guide,then there is no need to mount it to your router just drop in the router with the guide installed..and take it for a spin around.:)
If you don't like using the tape way,that I don't care for you can use the short pin nails to keep the stock in place,just pry up the parts the nails will just pull out of the stock because they don't have heads on them..
Plus with a drop of water on the nail holes you will not see the holes..:) nails don't drill out stock they just push it to one side..


======

You might want to read this.
Cutting perfect circles for centering rings & bulkhead plates - Rocketry Planet

It goes into detail how to cut rings with a 'Jasper circle cutting jig' .
I guess you can use any circle cutting jig. Just be sure to use double sided tape to stick your ply to a backing board.
 

Attachments

#7 ·
Thanks a bunch, gents, on both counts! Read the article, got the j-jig, took Bob's pin advice, cut the rings. Worked great, looks great. Tool will come in handy often down the road. I had been roughing out circles with the band saw and then following them on the table router, but this is MUCH better and obviously more versatile. Again, thanks!

R
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top