Amana Tool - RC-45711 In-Tech Insert Carbide V Groove 90 Deg x 11/16 Dia x 21/64 x 1/4 Inc

I am making very nice cuts on my CNC with this bit. High quality. Amana bits cant be beat and Amazon prizes are nice especially with free shipping.

This is really a great bit for my CNC. I needed a 90-degree bit that came to a sharp point, and many of the other bits out there do not come to that sharp of an edge. It cuts efficiently and cleanly with no problem at all. Its precisely balanced and no weird vibrations have been noticed. I will always recommend amana tools to anyone that needs them. Theyre my go-to for all applications.

Cuts very cleanly. Nice clean lines. No chip out on baltic birch plywood.

Acceptional durability at a low cost. Easy to find cheap replacement cutters

Let me preface this with the fact that I have worked as a machinist for 15 years. In general, this is a great design for an insert tool. I have always loved the ability to quickly change inserts when they wear down or break and the tool life on the inserts is good. However, my problem came when i had to change the insert for the first time. This is usually very simple with these types of bits across manufacturers. This bit in particular has a small design flaw that can be your undoing. Despite multiple attempts to align the bit correctly, I am still ending up with a flat bottom v from incorrect insert positioning. Usually, the insert is pushed into a tool up against a shoulder or centered on a countersunk screw to insure easy and proper positioning. This design has neither a shoulder or countersunk screw which allows for a lot of play and even using a caliper to set the recommended measurements for the insert has not fixed the issue. This problem ruined a $90 product I was making for a customer. It is such a shame that they came so close to a great design just to fall short. My recommendation is do some research and chose another product. If I am having this much trouble as an experienced machinist, I cant imagine the challenges faced by hobbyists and garage tinkerers.

it works very good and easy to use

Im really impressed with how clean the edge comes out using this bit. Ive had trouble with chatter that needs to have filed out making guitar pickguards. This bit leaves the edge smooth and doesnt require any filing.