First tried a 1/8" O flute only 6months ago to cut and pocket some polycarbonate https://www.amazon.com/gp/product/B0BN5RWQ75, was trying to get smoother finish than what the 1/8" upcut leaves. Seems better, but I haven’t used enough to recommend the bit, or claim to know what I’m doing.
Have single flute carbide 1/4" upcut from V1E https://www.v1e.com/products/1-4-single-flute-carbide-upcut-endmill?_pos=3&_sid=62172cacf&_ss=r, partly because of the Fun with Aluminum that Jonathan has.
Also got a V1E 1/4" upcut bit after breaking a bunch of genmitsu 1/8" carbide single flute upcuts while trying to cut Alu in the past. Am improving my setup and balancing my settings better. But, my hope was that 1/4" would last longer, and have larger overall MRR per sec than 1/8".
Posted because am curious about others’ experience with o flutes with Alu after seeing a reddit post, video and chatting with AI. Knowing of suppliers folks are happy with would be great too. Ordered rando 1/4" o flute based on rando reddit post… Will share how that goes…