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ruckus
05-19-2005, 01:42 PM
I recently aquired a plunge router and was wondering what you guys recommend for bits to cut MDF sub rings for fiberglass boxes, and for rounding port holes on MDF boxes?

TPABlazer
05-19-2005, 04:02 PM
Jasper circle cutting jig and a straight cut bit. or just cut one ring for a 12 or whatever, then use a flush trim bit with a bearing. 2 side tape or brad nail the ring to a peice of mdf, then just run the router on the indside nad outside with the bearing following along.

Rounding port holes, just any ol roundover bit with a bearing.. viper line from HD works reasonably well, Amana tool bits are great, but not cheap.

dbornotdb
05-19-2005, 05:09 PM
I use a 1/4" shank, 1/4" straight cut bit for cutting circles. Set the cutting depth to just over half way of the material and then flip the material over and line the guide pin up and cut again/ It will make the bits last 10x longer.

And then use a 1/4" shank, 1/2" roundover bit for the edges.

ruckus
05-19-2005, 05:31 PM
thanks