Tools for reaming are the reamers. According to the mode of operation, there are hand and machine reamers which may be provided with straight or spiral-fluted cutting portion.
Reamers are adapted to their respective purpose.
They are used for large bore hole diameters; only the cutting portion consists of high-grade tool steel, the shank is made of ordinary steel.
Various cutting parts can be put on one shank.
Figure 2 - Shell reamer
Used for reworking of worn out bore holes as well as for making non-standardized bore holes true to size. They can be adjusted to various diameters within a small range.
Figure 3 - Readjustable reamer
Used in sets (roughing reamer, semi-finishing reamer and finishing reamer) for large machine taper joints. For smaller taper pin joints, individual reamers of various nominal diameters are used.
Figure 4 - Serial taper reamers
1 - Roughing reamer
2 - Semi-finishing reamers
3 - Finishing reamer
Used for aligning offset bore holes when making riveted joints; structural reamers are spiral-fluted, big-taper reamers of a strong cutting effect.
Figure 5 - Structural reamer