Cover Image
close this bookManual Thread Cutting - Course: Technique for manual working of materials. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 22 p.)
View the document(introduction...)
View the document1. Purpose of thread cutting
View the document2. Kinds of threads
View the document3. Tools for internal threading (tapping)
View the document4. Tools for external threading
View the document5. Operation of thread cutting
View the document6. Special hints on the designation of threads by the example of the metric threads
View the document7. Technological process of cutting internal threads (tapping)
View the document8. Technological process of cutting external threads

1. Purpose of thread cutting

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.