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Reply by ArtMann

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Posted on Help me choose Spiral Bit for plywood

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ArtMann

1480 posts in 1627 days


#1 posted 09-27-2017 03:41 PM

I do this kind of cutting on a CNC router. An up-cut bit will certainly make the cut easier but as you already know, it will cause some splintering. You may want to try it anyway just to see whether you can tolerate it for your application. If only 1 side will show then you will be fine. An up-cut on the topside cuts like a down-cut on the bottom side. Sanding will fix it in some cases.

You will be able to cut faster with a 3/8” bit if you have a powerful enough router. A three flute bit will also permit you to cut faster if you have the horsepower to handle it. Google the term “chip loading” as it relates to CNC routing if you want to know more. If you are using a handheld router then you will run into power issues pretty quickly. Big CNC machines use 5, 10 or more horsepower spindles rather than a 120VAC plug in router.


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