Greene Tool U: Start using GTS educational materials today!

Learn more, go faster with GTS

Visit for our educational engineering and manufacturing library. This includes feeds and speeds, troubleshooting guides, feeds and speeds calculators, and other machining engineering expertise.

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Directions for Use

  1. Enter your data parameters into the fields on the left
  2. Click the green arrow in the center of the calculator
  3. Your answers will appear in the fields on the right
-- change calculator using buttons below -- Tap Drill MM Tap Drill RPM SFPM Helix Angle

Tap Drill Size

MM Tap Drill



Helix Angle