Reply by Calneva

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Posted on Help me choose Spiral Bit for plywood

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2 posts in 1053 days

#1 posted 09-27-2017 05:51 PM

Whiteside replied to my inquiry indicating the UD2102 will feed 300 ipm in 3/4 ply with 3.25hp on a CNC machine. From this I conclude it is not the bit that’s slowing me down, but my ability to apply force while keeping it under control. They indicated the larger bits will feed faster, to 600 ipm, but will require a larger router to do so. I think this is because as DS pointed out the higher face velocity.

It’s still not clear whether I will see any advantage with larger bits when hand-holding because that obviously depends a lot on me. The more force I have to apply to push the bit, the more risk I have of jumping a template, tilting the router, or some other loss of control, and the more demand I put on my work-holding setup (typically a few Bessey clamps that already get in the way more than I’d like).

Whiteside suggested 16,000 to 18,000 rpm to let the bit get a better bite. I’ve been running 21,000. I’ll try that. I’ll also try two-passes to see if that works better. I also think I’m going to try a two-flute 3/8” compression bit and see how it goes. If nothing else, I could use the extra cutting length for thicker templates.

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