🔩 Yonico 31014 SC 4" Diameter Spiral Router Bit Review

For my application it was a lot worse than the Onsrud bits I used. I cut a 1/8 inch acrylic mirror and the edge was uneven, like the acrylic was chipping. I switched back to the Onsrud drill bit and it cut smooth as butter. This is probably a decent inexpensive fix for some. Materials, but I'll pay more for a better beat.

I use these bits in my CNC router, primarily for cutting aluminum and plastic. Decided to use this bit instead of my Onsrud 63-610. The aluminum was T-65, which put more stress on the racquet than traditional non-tempered metals. Regardless, this punch lasted about 30 minutes in a 3 hour run. After it broke I switched to the onsrud bit and finished the job. While I don't think this bit is weak or ineffective, it does appear to be slightly weaker than Onsrud.

I bought these as a cheaper alternative to the Onsrud and Amana O-Flute series. They totally did the job and very good value for money. Their bottom edge in the pockets is the only area they brand. They have excellent chip control and clearance in plastics as well as good surface finish. I use them in lots of HDPE and Acetal with a desktop CNC router (Axiom AR1). These bits run easily at 60-100 ipm on such a small machine and still deliver a good cut.