How is a downcut v-bit even possible?

CNC Machines
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I’m buying my first router bits as a new CNC owner, and although I’ve been suggested to look for downcut V-bits, I just don’t see how designing one would be possible without spiral flutes. Yet, I see them advertised as ‘down-shear.’ So what’s up with this? Is calling them downcut just a marketing ploy, or does someone out there actually offer a genuine downcut V-bit? And if so, who?

Also, who sells 1/2" wide V-bits (1/4" shank)? I’ve found 3/8" wide but no 1/2"

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Whiteside 60° V-Groove CNC Bit 1/4" SH 1/2" D 2" OL | Woodcraft

1 Like
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Nice, thanks Martin. I hadn’t even thought to look at Woodcraft.

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These are really pretty common at most places that sell router bits. A whiteside would be my first choice but for just messing around these will stay sharp for a simple job. My experience is that you get what you pay for with router bits. Whiteside, Freud, Amana, and CMT are nice bits.

Vermont American 1/2 in. D X 1/2 in. X 1-3/4 in. L Carbide Tipped V-Groove Router Bit Mfr# 23120 - Ace Hardware

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There’s only one down cut that I am tracking: https://www.cadencemfgdesign.com/product-page/60-groovee-jenny

I have it and I’m not sure I see a perceptible difference over the white side. Though I’ve not done any head to head testing…

-Tom