Figure 14-5.Using auger controls for positioning of auger.
Figure 14-6.-Continuous-flight auger.
and to clear the bit of cuttings. Remember, as the auger
is raised, push the hand throttle forward to lower the
engine speed. Repeat these procedures until the hole
being drilled reaches the desired depth.
Earth augers may use continuous-flight augers
(fig. 14-6) or single-flight augers (fig. 14-7).
The auger head is attached to the drill shank by a
square-drive pin connector. Continuous-flight augers
usually come in sizes from 5 to 12 inches in diameter
and various lengths. A 5-inch auger can drill about 100
Figure 14-7.-Single-flight auger.
feet in suitable material; a 10-inch auger is limited to
about 40 feet.
Single-flight augers, lifted after every 8 to 10 inches
of penetration to clear the cuttings, measure from 14 to
36 inches in diameter. Single-flight augers are limited
to depths of about 15 feet.