What is the difference between Up and Down Cut Endmills?
What is the difference between Up and Down Cut Endmills?
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Downcut Endmills are best used for thinner materials which will be pushed down into the machine bed rather than being lifted with an up-cut spiral. Downcut spiral tools should be used when processing thin materials, 1/8” (3.175mm) or thinner.
With this type of mill, you will achieve a high-quality cut finish on the top surface of cut parts.
Upcut Endmills are the most popular type of fluted tool. You can use these for grooving or slotting, for upward chip evacuation.
Beware that the upward force can pull the material causing a ragged finish on the top surface, or even worse, launch the part from the table. This will give the best finish on the bottom side of a part.
These bits allow for rapid cuts since the tool clears the chips away from the material. While ideal for cutting thicker materials, this type of tool is not recommended for thinner or softer materials.
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