|Manual Thread Cutting - Course: Technique for manual working of materials. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 22 p.)|
Thread cutting is cutting of helical turns of threads out of the tapping-size hole or bolt in order to create screwed connections.
Figure 1 - Thread cutting
A complete screwed connection requires an internal thread and a matching external thread as a counterpart. With single-piece manufacture or with repair work, manual thread cutting is a necessary working technique, because - due to technical and economical reasons - machines cannot be used in every case.