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Jigs and Mods 11

Greg's Curved Foot Jig

Greg Coulter from New Zealand designed an ingenious jig to enable him to cleanly cut some curved feet for a cabinet he was making. I like his system which I feel could easily be adapted to suite your own work. Greg has already posted this on some forums but has kindly agreed to allow me to post here also.

This is what Greg produced on his 'Rat. Its a horizontal pedestal foot for a cabinet with  curved ends.

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In essence Greg made a mounting plate to which a support for the work is fixed by a pivot point and can be locked in a varying position along an arc. An alternative rotatable fence withh toggle clamps can be seen hanging on the wall.

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He made the support from 18mm plywood. The pivot bolt is a recessed one with a Allen socket. It is fixed on the back with a locknut. One of the prime reasons for this mount is so that a clean cut with no breakout can be achieved.

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Greg made up an alloy mounting plate which fixes to the 'Rat just like a mortise rail. This is a rear view. The pivot bolt can be seen top left with a fixing bolt which travels in the arc slot. In this case he has a movable fence fixed to the other side. I guess the plate could be made of plywood, tufnel or MDF.

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An end view of the carriage with the mount held in the fence. The white tube is for dust extraction.

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Here is a shot of the work-piece mounted on the holder and clamped. The mount is profiled to match the work and so ensures a good clean cut with no breakout. The mount is progressively rotated along the arc allowing the router to cut the curve. looks as if Greg is using a spiral bit here.

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He also made up a wooden fence and fitted it to the backplate as shown here. Smaller work can be fitted to this fence and held with the two toggle clamps. The pivot and arc fixings are held with bristol levers. A perfect system for creating rounded ends to a batten.

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Dave R. created a pdf of Greg's plan that can be downloaded here  

I believe Greg used 10mm alloy plate.

That's a great jig Greg that I am sure  many people will find very useful.

Thanks.

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