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close this bookThread Cutting by Dies and Taps - Course: Techniques for machining of material. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 20 p.)
View the document(introduction...)
View the document1. Purpose and importance of thread cutting by dies and taps
View the document2. Construction and types of dies and taps
View the document3. Preparations for thread cutting by dies and taps
View the document4. Thread cutting by dies on simple cylindrical workpieces
View the document5. Thread cutting by dies on recessed cylindrical workplaces
View the document6. Thread cutting by taps on through holes
View the document7. Thread cutting by taps on blind holes
View the documentAppendix 1

4. Thread cutting by dies on simple cylindrical workpieces

Thread cutting by dies produces an external thread. The work-pieces are processed on the external surface.

- Operations are carried out in chucked conditions.

- Often extended chuck jaws are employed in order to ensure true workpiece running and not to damage the surface of the pre-worked parts.

- The die is positioned in the die holder.

- The die is positioned by means of the quill.


Figure 16. Positioning the die

1 die, 2 quill, 3 support for die holder, 4 workpiece

- The first thread turns must be cut by hand.

- After the initial cut machine processing follows with the help of a support for the die holder. (see Fig. 14)

- Ensure proper cooling and lubrication.

- The chip chambers must always be kept clean.

- Turn back the die by hand after having completed the work sequence.

- The thread is checked by means of a thread ring gauge.


Figure 17. Normal thread ring gauge to check an M 16 thread

What is checked by means of the thread ring gauge and what must be heeded?
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