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      <title>Creating an External Thread Operation</title>
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      <div class="title_topic3" id="xps10_pagetitle">Creating an External Thread Operation</div>
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      <p class="para_topic">In a Thread Milling operation, after you select the thread geometry, press Select Start to select the start face. </p>
      <p class="para_topic">The Axes Control dialog opens. &nbsp;</p>
      <p class="para_topic">On this dialog you have the options Reverse Thread Axis and Reverse Tool Axis. &nbsp;If you select either of these, the conehead for the vectors are not updated or changed unless you have specifically selected the dashed circle on the symbolic thread.</p>
      <p class="para_topic">If you select the top face of the part on which the symbolic thread (OD or ID) is created for the starting face (the que line prompts you: &nbsp;Select Start Face), then the vectors do not change when toggled. &nbsp;</p>
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