Bit Size

The diameter of the bit dictates how fast the machine can move in the X and Y directions. To excavate the object the mill must slowly remove layer after layer of material, not all at once or the bit will break. This process of stepping slowly down into a model is called depth cuts.

Rule of thumb:

• never cut deeper than one half the diameter of the bit in any single cut, this means that the depth of the depth cuts should be no deeper than one-half the bit diameter
  

The smaller the bit size the slower and longer the object will be in the machining process.

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