Anti-hook boring tool.
Generally, when processing counter-hook boring tools, the tool holder is relatively long, so this tool holder has special requirements. It is best to use a shock-proof tool bar.
Halo, I’ve been working on it for a long time and yours is a welding knife.
Try adjusting the tool tip arc. If it is too small, the surface will definitely be bad, but if it is too large, the cutting force will increase and vibration will occur. Relatively speaking, the larger the arc, the more durable the tool.