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close this bookDriling, Countersinking and Counterboring - Course: Technique for manual working of materials. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 18 p.)
View the document(introduction...)
View the document1. Purpose of drilling
View the document2. Machines for drilling
View the document3. Tools for metal drilling
View the document4. The operation of drilling
View the document5. Setting of the tools
View the document6. Clamping of the tools
View the document7. Clamping of the workpieces
View the document8. Technological process of drilling
View the document9. Purpose and application of counterboring/countersinking
View the document10. Labour safety recommendations

1. Purpose of drilling

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.