What is the plane effect of spiral bit planing?

That depends on what brand of spiral cutter head. If it is common in China, I suggest you not use it. The effect is too general. I don't know until I try. I tried, so I still don't use it in China. If the surface is smooth and delicate, and the requirements for wooden parts are high, it is recommended that you use the spiral cutter head of Li Xing tool in Taiwan Province. I'm not advertising, it's much better than domestic ones, and the matching blades are very powerful. I'm using it now, too. ! !