3. Kinds and construction of centring, drilling, counterboring and countersinking, reaming and tapping tools

The following main tools are applied: centre punch, centre drill, twist drill, counterbores and countersinks (spiral-flute counterbore, 60° and 90° included angle countersinks, piloted counterbore), reamer, tap.

Figure 7. Centre punch

Figure 8. Centre drill

Figure 9. Twist drill

Figure 10. 60° or 90° included angle countersink

Figure 11. Spiral-flute counterbore

Figure 12. Reamer

Figure 13. Tap

The basic construction of the tools to be used differs only in the shape and number of tool cutting edges. The tools to be used can have a parallel shank or a taper shank. The basic construction of the tools can be seen in Figures 7 - 13.

Which tools can be used for reaming a bore, taking the technological sequence of operations into consideration?
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