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		Driling, Countersinking and Counterboring - Course: Technique for manual working of materials. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 18 p.)
			(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

2. Machines for drilling

In the field of maintenance and repair, simple bench-type drilling machines, upright drilling machines and portable electrodrills are used. In modern production plants, multi-spindle drilling machines, boring mills as well as numerically controlled machines are used, also turning machines and automatics.