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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