Ball Nose Upcut vs. Downcut

[szavoda]

I was about to start doing some 3D cutting and needed some bits. I am seeing that I have options for Up and down cut. As long as I am doing a roughing cut first, does it really matter?

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[awerby]

Up-cut is standard, because it evacuates the chips. Down-cut is used when you're cutting plywood or laminates and want to avoid pulling up chips in the top veneer. If you're running a roughing pass first, that's not going to be an issue, so go with the up-cut bits.

[krunkerio]

Hello. As I know, ball nose spiral end mills are used for smooth contouring and fine detail passes with a CNC router and often for complex shapes like 3D carvings. These bits are also excellent for routing fluted columns and channels in cutting boards and countertops edges.
krunkerio

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