Router bit was used.

This is a good bit to make the groove in cutting boards, like almost all cutting tools, it's very stressful to go just plowing down the middle of a board full diameter, so I used a 1/4" router bit to rough out the groove first, and I also made my groove 7/8" wide, this allowed me to run this profile bit on the outside edge and then the inside edge in separate passes, and since most of the material was gone, it was doing very little material removal and I got nearly no chatter and got a really nice smooth finish. I really doubt it would be so nice just trying to take one single pass and try to make the groove, remove all the material and profile it all in one massive cut. Take your time, make rough cuts, make the final groove at least a little bit wider than the bit so you can shave off each edge individually, and you will get GREAT results, and it will be much more enjoyable.Another thing to note is that unless you are surfacing off the entire board, then you are better off with a hand router or a table router over a CNC router. The reason is, unless the material and your machine table are incredibly flat, or you are surfacing off the entire cutting board on the CNC, the variation in thickness will make the upper round over come out wider or narrower depending on the exact height of the surface at any given point. I had an existing cutting board I wanted to make the groove in, and I didn't want to surface it down, so I played it safe and made a template with my CNC and then used a hand router with the template clamped to the cutting board and this way the hand router is always referencing from the actual surface of the material and I got extremely accurate radii along the upper edge.It's a really great profile bit and I'm really happy with it!

This is not my favorite juice groove bit, but it is a solid option. I like that it rounds both shoulders of the groove.

JUST AS ORDERED

I recently purchased two large teak cutting boards that were on clearance. They did not have juice grooves, but because they were such a good price I figured I would get them anyway. I got this router bit for the sole purpose of cutting juice grooves in these cutting boards (and others if necessary in the future). The price seemed a little high, but then I started looking at the cost of other specialty router bits and decided the price was actually reasonable.It is a high quality router bit with a 1/4" shank. I knew I would need a jig to make sure I didn't screw this up so I built one after watching several YouTube videos and dove in. One of the secrets I learned from watching the videos is not to plunge the bit the full depth in order to avoid burn marks. Instead, I made several passes, each time lowering the bit more until I reached the final depth. The end result was a beautiful juice groove that looked like it was made at the factory.This bit worked great and I plan to use it other projects in the future.