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close this bookThreaded Joints - Course: Techniques of fitting and assembling component parts to produce simple units. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 25 p.)
View the document(introduction...)
View the documentPreliminary Remarks
View the documentHints on Labour Safety
View the document1. Purpose of Threaded Joints
View the document2. Selected Types of Bolts and Screws
View the document3. Selected Types of Nuts
View the document4. Selected Types of Locking Devices for Bolts and Screws
View the document5. Selected Types of Washers
View the document6. Types of Threaded Joints
View the document7. Stresses in Threaded Joint
View the document8. Tools
View the document9. The Technological Steps of Making Threaded Joints
View the document10. Undoing Threaded Joints

10. Undoing Threaded Joints

- Bolts and screws which have grown rusty should be treated with a suitable rust solvent, to loosen them.

- Bolts and screws which cannot be loosened despite the use of a rust solvent must be bored out. Bore when you have removed the head and the nut with a chisel.

- Where component parts are to be taken apart, all screwed joints should be loosened before the parts are fully dismantled.

- Use a suitable support for large parts which are to be dismantled so that they cannot drop onto the ground. Put the support in place before you unscrew the joints.

- Make sure that you remember the correct mounting position of parts which were removed for repairs.

Mark the parts suitably for re-assembly.

Use the right size of tools for disassembly work.

Beware that bolt threads or nuts are not damaged or you slip and cause injuries.

Give important details of dismantling component parts.

What general requirements must be met by assembly tools?