Thread Milling Calculator
Calculate helical interpolation feeds, speeds, and thread geometry for CNC thread milling operations.
Inputs
in
in
in
RPM
in/tooth
Results
Helical Feed Rate
8 IPM
Time per Pass0.05 min
Thread Depth0.03 in
Minor Diameter0.44 in
Threads per Inch20 TPI
Z Feed Per Rev$0.05
How to Use This Calculator
- Enter the major thread diameter and thread pitch (or TPI) for the required thread specification.
- Set the thread mill cutter diameter, spindle RPM, chip load per tooth, and flute count.
- Review helical feed rate, time per threading pass, thread depth, and minor diameter.
- Program a single helical interpolation pass using the calculated feed rate and thread depth.
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