Easy OF 1400 circle cutting jig

[jbasen]

Festool makes a circle cutting jig for the OF 1010 but it wasn't clear from the web site if this would work on my OF 1400.  It was very easy to make my own.  I simply purchased a 2ft long by 5/16" diameter piece of aluminum rod off eBay, drilled a 16" hole through the rod at one end, and stuck a finishing nail through the hole.  The rod secures snugly in the router and it works great. 

 

[Wuffles]

Sounds good. I bought one of the Festool branded ones when it "was" still badged as suitable for the OF1400 - it isn't now and this was only a year ago - and it doesn't fit properly. Someone on here cleverly pointed out that you need to put through a spare rod on the other side of the base to clamp it all down snugly.

Still haven't used it.

 

[cfullen]

Tried this.  The flexibility of the aluminum rod is an issue for me.
I'm going back to the drawing board

 

[jbasen]

Tried this.  The flexibility of the aluminum rod is an issue for me.
I'm going back to the drawing board

I've only used mine on some smallish circles and haven't had an issue. For larger circles you can switch to steel bar stock for added rigidity. The only challenge will be drilling the hole for the pivot

Jay

 

[Roseland]

I strongly recommend the MFS solution - very easy to set up, very accurate and reproducible. 

If you want to do really big arcs/circles, you can even use guide rails as extension pieces.  This isn't specifically recommended by Festool, but it does work!

Andrew

 

[DanielOB]

You can scrap your router this way if you get into resonance with larger radius.
I think it will be better to get a hunting bow string 8190 Which does not stretch and connect a router with a nail at the circ. center.

 

[rustym]

This is not something I've tried, but seems like a piece of ply (length determined by radius of arc) with a pivot hole in one end and a guide bushing hole in the other end would be a very stable way of using the router for this.

Rusty