|Thread Cutting by Dies and Taps - Course: Techniques for machining of material. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 20 p.)|
External thread results from outer surface processing of the workpiece.
- Work is made in the chuck.
- The workpiece is clamped in the extended chuck jaws.
- The die is positioned in the die holder.
- The die is brought into position with the help of the quill.
- The first thread turns are cut by hand.
- Following the starting cut machine processing is made with the help of a support for the die holder.
- Ensure that the chip chambers are kept clean.
- Switch off the lathe 2 - 3 mm before reaching the shoulder and cut the remaining thread turns by hand in order to prevent tool breakage and ensure sound quality.
- Turn the die back by hand upon ending the work sequence. Having completed the thread, deburr all sharp edges with a finishing file.
- Ensure proper cooling and lubrication. Only measure and check with the machine at rest.
- The thread is checked by means of a thread ring gauge.
How is the die positioned on the