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How to choose correct Thread Mill Diameter

When thread milling, the diameter of the tool has to be smaller than the thread diameter. The reason for this is that the thread has a helix angle, but the tool is straight. If the tool is too big there will be a deviation on the thread profile. The size of this deviation depends on several parameters.

  • Thread diameter
  • Cutter diameter
  • Profile angle
  • Pitch

Big cutter diameter compared with thread diameter, small profile angle and big pitch. These are parameters that gives bigger deviation.

thread_mill_diameterThere are three alternatives too choose correct thread mill diameter. Please follow the links to get more information.

SmiCut Catalogue
SmiCut Online Store (THREAD MILLING Application)
SmiProg - Software for Thread Milling
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