It works very well to cut cir. on the router table and what anyone may say it's a safe way to do it, I do it from time to time.. see below
But I will say it's best to have a lift on your router or a power lift like the one below but it's not a must have item and hand crank will do the job just fine..
You will see I used a brass guide in the table, it's to line up the jig dead on every time and with the two bolts the jig is locked in place..and you don't need to sq.up the stock you want to use for the cir. just drill a hole in the stock and it will do the job for you.. easy stuff and fun stuff on the router table..
***NOTE +++ if you have a tee track setup on your router check out how John N. set is up by using the tee track ,neat way to get the job done..he is a very sharp guy
see link below
But his has one small down fall it can't cut anything smaller than 10" cir but not with the one I came up with ( my setup you can cut a cir. from 1 1/2" to ~, just as long as jig board..)
John N. is the one that came up with the Power Lift that MLCS is now selling.. MLCS PowerLift™ Motorized Router Lift
Great way to make round picture frames and bowls..once you get the hang of it..you may say how can you make bowls, just cut out the rings and glue them up as high as you want them to be...then just chuck a round over bit in the table and put a profile on it..or like below MLCS POWERLIFT and Daisy Pin Router Make A Bowl
+++++++++ Router Table Circle Cutting
Thanks guys, spot on about cutting the square to the correct size before using the jig. I dont find any problem with raising the cutter 1mm at a time as you hold the piece in place. If you are concerned you could rig up a hold down that will keep the workpiece firmly held on to the pivot pin while you rotate it. I thought that the work involved in the other circle jigs was a bit much.
Thanks for the input.