How is a downcut v-bit even possible?

[bradleyheathhays]

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"

 

[RGABEL]

Check https://www.cadencemfgdesign.com/shop Yes there are down cut V-bits. These were designed to allow a clean edge when cutting through masking material. I have used these bits for several years and have zero complaints with them. You can also download the tool database for some of the popular CNC's.

 

[RGABEL]

Can also checkout https://idcwoodcraft.com/ I have a few bits from here as well and they have been great. He has some 3/4" diameter v bits.

 

[bradleyheathhays]

Check https://www.cadencemfgdesign.com/shop Yes there are down cut V-bits. These were designed to allow a clean edge when cutting through masking material. I have used these bits for several years and have zero complaints with them. You can also download the tool database for some of the popular CNC's.

Thanks for the links RGABEL. Definitely have my eye on both Cadence and IDC.

Let me ask you about my specific use case. Have you used Cadence's downcut Vbits to cut pine boards through Oramask 813, followed by spray paint with good edge results after the film was removed? That's the process I'm hoping to use if it works well enough. I've heard people warn about spotty results when spray painting after cutting through Oramask with a V bit.