Driling, Countersinking and Counterboring - Course: Technique for Manual Working of Materials. Trainees' Handbook of Lessons: 1. Purpose of drilling

Driling, Countersinking and Counterboring - Course: Technique for Manual Working of Materials. Trainees' Handbook of Lessons

		(introduction...)
		1. Purpose of drilling
		2. Machines for drilling
		3. Tools for metal drilling
		4. The operation of drilling
		5. Setting of the tools
		6. Clamping of the tools
		7. Clamping of the workpieces
		8. Technological process of drilling
		9. Purpose and application of counterboring/countersinking
		10. Labour safety recommendations

By drilling, cylindrical recesses or break-throughs are cut out of workpieces.

Figure 1 - Drilling

Figure 2 - Blind hole and through hole

It is necessary if

- screw joints
- pin joints
- riveted joints
- passages for fluids and gas

shall be made and if cylindrical machine parts shall be guided or carried.