Taps Dies Thread cutting Threading operations Taps Dies Thread cutting

External thread Internal thread

Pitch The distance from a point on a screw thread to a corresponding point on the next thread. Pitch = 1.0/threads per inch

Threads Fits Threads are classified by the accuracy of form and fit compared to a theoreticly perfect thread. Application dictates thread class requirements

General anatomy of threads Pg 91 ST

Different forms Acme Buttress Square Taper

Tap- threaded tool with external flutes Die- Internally threaded tool

Tap types Taper Plug Bottom

Thread cutting on Lathe External Internal

Tonights operation Debur Material Drill tap hole on mill Tap using tap chuck and guide bushing