Thread Cutting by Dies and Taps - Course: Techniques for machining of material. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 20 p.): 7. Thread cutting by taps on blind holes

Thread Cutting by Dies and Taps - Course: Techniques for machining of material. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 20 p.)

		(introduction...)
		1. Purpose and importance of thread cutting by dies and taps
		2. Construction and types of dies and taps
		3. Preparations for thread cutting by dies and taps
		4. Thread cutting by dies on simple cylindrical workpieces
		5. Thread cutting by dies on recessed cylindrical workplaces
		6. Thread cutting by taps on through holes
		7. Thread cutting by taps on blind holes
		Appendix 1

7. Thread cutting by taps on blind holes

The internal threads are produced by processing the workpiece surfaces by means of bores.

- work is made in the chuck.

- the workpieces are clamped in extended chuck jaws.

- the tap wrench is positioned on the square of the tap.

- the tap wrench holder is on a support.

- turn back the tap several times to remove the chips.

- the required thread depth is controlled on the quill by means of a steel band measure.

- switch off the machine 2 - 3 mm before ending the work sequence and cut the remaining thread turns by hand in order to prevent tool breakage and ensure sound quality.

- ensure proper cooling and lubrication.

- turn back the tap by hand after having completed the work sequence.

- the thread is checked by means of a thread ring mandrel.

When are dies and taps used for thread cutting?
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