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Milling a Thread
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How to cut a thread using a Thread Mill

thread_milling_tool_photo.jpg

In this example we are going to mill a thread using a .75 Thread milling tool. Imuge sells a very nice one that I have used in the past.

 

Set up the .75 thread mill in Tool Setup

 

Go into Part Programming and program a milling datablock to clear the material away for the thread mill. we are going to cut a 2" 10 TPI so mill out to the minor diameter of 1.759"

 

gsf_operation_diagram.gif

Goto a new datablock

 

Select the MILLING then  LINES AND ARCS Soft Key

 

Enter X Start To Half the Tool Diameter: IE:  -.375

Y Start to 0 – Z Start .05 – Z Bottom -1.0

 

Enter the Tool # you setup to cut the thread with...

 

Set your Offset to Left and ENABLE BLEND MOVES to “NO”

 

Press the NEXT SEGMENT Softkey

 

Choose ARC then CCW Softkey

 

X End Will be of the Diameter of the thread... 1.0"

 

Y End will be 0 - X Center Leave Blank - Y Center Enter 0

 

Press the NEXT SEGMENT Softkey

 

Press the HELIX Softkey

 

Press the CCW Softkey

 

X End will be the Same or Leave Blank - Y End Enter 0 -nZ End Leave Blank - X & Y Center Enter 0

 

Radius will be Calculated

 

Lead will be 1 / Pitch or in this case 1/10

 

Sweep Angle will be calculated at 360 –If you wanted more turns, change it i.e. 3 Turns – 1,080

 

Press the NEXT SEGMENT Softkey

 

Press the ARC Softkey

 

Press the CCW Softkey

 

The X End will be where we started -.375 / Y End will be 0

 

Skip X Center and Enter 0 For Y Center – the rest will be calculated

 

Press DRAW – You may want to press the GRAPHIC SETTINGS Soft Key and set SHOW GRAPHICS to “Tool Path” to get a clean Image.


Then EXIT and REDRAW

tom@amamc.com Toms Cell 781-801-2500