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		Keyed Joints - Course: Techniques of fitting and assembling component parts to produce simple units. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 21 p.)
			(introduction...)
			Preliminary Remarks
			Hints on Labour Safety
			1. Intended Use of Keyed Joints
			2. Types of Keys
			3. Types of Keyed Joints
			4. Kinds of Stress Acting on Keyed Joints
			5. Tools and Auxiliary Accessories
			6. Selected Technological Operations for Making Keyed Joints
			7. Undoing of Keyed Joints

Hints on Labour Safety

On principle, the regulations on industrial safety apply which have to be observed with the techniques of filing, scraping, reaming, milling and slottering.

Special attention has to be paid to the following focal points:

- Use only clean, undamaged and sharp tools.
- Clamp the workpieces safely and firmly but so that they are not damaged.
- Keep the measuring and testing instruments in a safe place, protect them against damages caused by shock and/or corrosion.
- Keep your workplace in order, keep fittings pieces always together with their matching parts.