Manual Thread Cutting - Course: Technique for manual working of materials. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 22 p.): 2. Kinds of threads

Manual Thread Cutting - Course: Technique for manual working of materials. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 22 p.)

		(introduction...)
		1. Purpose of thread cutting
		2. Kinds of threads
		3. Tools for internal threading (tapping)
		4. Tools for external threading
		5. Operation of thread cutting
		6. Special hints on the designation of threads by the example of the metric threads
		7. Technological process of cutting internal threads (tapping)
		8. Technological process of cutting external threads

2. Kinds of threads

Fastening screw threads:	metric threads (V-shaped threads)
	Whitworth threads (V-shaped threads)
Power-transmission screw threads:	knuckle threads, acme threads, saw-tooth threads

Figure 2 - Kinds of threads

1 - Vee thread
2 - Knuckle thread
3 - Acme thread
4 - Saw-tooth thread

Sealing threads:	tapered threads (metric and Whitworth)
Pipe threads:	Whitworth pipe threads

By manual thread cutting, only fastening screw threads and partially pipe threads are made. These kinds of threads are made as left-hand or right-hand threads as well as coarse screw threads and fine screw threads..