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Posted on Help me choose Spiral Bit for plywood

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3518 posts in 3224 days

#1 posted 09-27-2017 04:01 PM

With 3 flutes, if you don’t get a high enough chip load, it will overheat.
Since you are doing this manually, I would think two flutes (or even one flute) is a good fit.

Larger diameter bits will allow a faster cut and have a higher velocity on the cutting face which usually means a cleaner cut.

A 1/4” two flute spiral should do better than 36ipm, (I would expect 80ipm, or so), but, your router, (or even your arms), may not handle the larger work loads that a higher ipm may present. (Same is true with larger bits)

A 1/2” compression cutter should work fine in the 100ipm to 800ipm range and you could consider a chipper/finisher bit which clears the waste faster and would allow feed rates upwards of 1000ipm, however unachievable this would be by hand.

I would say a bit of experimentation is in order to characterize the work you are trying to do – Especially if this is an ongoing matter and not just a one time project.

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251

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