[template tom]

I have plans for a really cool one..... Since it is out of a book I can not post the plans here.

It will cut down to as small as 1" and as large as 7" (or more if you want). It is a sub base made out of plastic with a slot for the bit (1/4"+) and slots for two mounting screws to attach it to the router. You can set the dia of the cut to anywhere in the range. You do need to put a "pin" in the workpiece for the center..... Since you are all sharp people anyone here that wants to make one take a look at the sketch and figure out your sizes and enjoy. The view is from the bottom, the hole is for the "pin", the two matching slots are for the mount screws (flat heads). This of course may not work on your router..... and yes it is for a plunge router.

Ed

A very popular circle cutting jig posted by Ed for routing small circles The only problem is adjusting to the various diameters required each time it is used. To adjust to size you will require to undo the four screws that hold it to the base. I have enclosed my circle cutting jig that can be adjusted from the top with the two screws that is used to hold the side fence attachment.( This is the side fence attachment for Makita 3612 or the Hitachi 12v) This certainly is easier to adjust. I use it all the time to rout circles from 30-40mm in diameter depending on the cutter used. It is also adjustable to increase the size of the circle simply by repositioning the "Pin"
I have also produced another jig that does NOT require the side fence attachment as illustrated.
Tom

 

[template tom]

Hi Tom
I'm a little behind on reading the posts, but curious about this jig of yours. Could you please explain it a bit more, I can't quite figure out how to use it. I do have the Hitachi M12V and would like to make small circles. Also what bit do you use? Thanks!
~Julie~

Hi Julie
The side fence attachment was used for the original Circle cutting Jig This was secured to the base board 300mm x 160mm on the underside is inserted the fulcrum pin into 'Tee' nuts There are four nuts where the fulcrum pin can be re-positioned to give a great variety of circles. This has worked very well for me over the past 20 years
Tom

 

[template tom]

RDMELLO
You will require to make a Template then very carefully rout out the circle with a straight cutter
Tom