Fig 42 Cleaning An Auger

that purpose called an "auger-bit file" or a "slim triangular file." The auger-bit file is flat and thin, and is better suited for the smaller bits than the triangular file. For the larger bits, either of the two files may be used.

To file an auger bit, proceed as follows: First, place it flat on a bench or table, and file off the parts of the spur which have been bent outward. This is done by holding the file as shown in Figure 43. A mill file is well suited for this operation. The worker

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