Thread: Circle jig

The thing I find about jigs is this.
I always seem to need one to finish a project, thus the project would go on hold so the jig would be rushed and not really what's in my head....Thus the result isn't satisfactory.....Or I think that I may need a jig to do this, find a way around it (taking much more time than if I built a jig) and I forget about it til next time.... Then the process starts all over...

Great job on producing one that looks very stable/well made/not rushed in the slightest....And obviously gives a great result !!

Well this one was made so that I could cut an accurate round picture frame for my 10 year old granddaughter's project. And she is quite particular!

Thanks for sharing

Can you describe its operation in more detail please ... pic in operations and jig components would be fantastic.

Regards

Rob

Simples.
The aluminium bar contains a 1.5mm pivot point, which can slide in or out to set the radius of the circle.
The bar is locked in place by a thumbscrew underneath the jig platform, which is made from laminated chipboard (both sides) to assist sliding.
The pivot needs to be aligned laterally with the teeth, so to accommodate different width blades there are two thumbscrew stops in the piece of timber screwed under the front of the jig. I used jarrah so I could tap it, and nylon thumbscrews so they wouldn't mar my scale fence.
The jig rides in the mitre slot courtesy of a hardwood runner.

So to cut a circle, first drill a 1.5mm hole in the centre of the intended circle.
Adjust the aluminium bar to set the radius.
Adjust the plastic stop screws to align the pivot point with the front of the teeth
Place the workpiece on the pivot point
Turn on the saw and slide the jig towards the blade until it hits the stop screws, and then rotate the workpiece clockwise to cut a circle.
Turn off the saw.
Done!