1/4" cutting diameter on a 1/2" shank upcut spiral bit?

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Forum topic by wilyum posted 08-24-2017 09:07 PM 538 views 0 times favorited 3 replies Add to Favorites Watch
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1 post in 2846 days

08-24-2017 09:07 PM

How would this bit perform differently than a 1/2” cutting diameter, 1/2” shank spiral bit? Would it cut through material quicker because it is removing less material with the smaller diameter? Also the smaller diameter would be turning quicker than the end of the 1/2” diameter bit. I am looking at cutting wheels out of 3/4” pine and can’t decide which would do the job quicker.

3 replies so far

View Loren's profile


10477 posts in 4415 days

#1 posted 08-24-2017 09:18 PM

1/4” spiral bits are prone to breakage in
heavy cuts, so that’s an issue that will limit
the speed of material removal.

View jerryminer's profile


960 posts in 2208 days

#2 posted 08-25-2017 01:17 AM

Besides the breakage issue, a larger diameter bit, in general, will make a smoother cut, with less chatter, than a smaller diameter bit.

And you’ve got it backwards—a larger diameter bit will have a faster rim speed than a smaller bit at the same RPM.

-- Jerry, making sawdust professionally since 1976

View hotbyte's profile


1001 posts in 3742 days

#3 posted 08-25-2017 01:23 AM

Can you cut them with bandsaw/jig sawand use template with flush trim bit to clean up?

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