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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

10. Labour safety recommendations

- Wear close-fitting clothes and head shield, if necessary, safety glasses, too.
- Only one person must work at a machine - otherwise there is the danger of being distracted.
- Always do the cleaning and setting work with the machine switched off.
- Secure the workpieces safely against twisting and being pulled up.
- Do not remove any chips with bare hands, but with the help of suitable auxiliary means (such as short hooks or metal rods).
- Leave the machine only when it is at rest.