Use the software on this page to calculate the helix angle and get recommendations for the most suitable anvil (also known as insert shims) based on the threading insert you are using.
Helix Angle Calculator iOS App
Make offline calculations directly from your phone! The Helix Angle Calculator for iOS is now available in the App Store!
Manual Method
You can also manually calculate the helix angle and find the right anvil using our diagram and table available on the Helix Angle in Thread Turning page or by downloading our PDF guide.
