The Auger Bucket is an open-top metal cylinder with one or
more slots in its bottom that permit soil to enter as the bucket is rotated and
downward pressure is applied. The slots are reinforced and usually are equipped
with teeth or a cutting edge. To operate, the bucket auger is attached to the Kelly
rod. It is driven by a rotary table. Rotation and downward pressure are used to
fill the bucket.
When the bucket is full, the rotation is stopped and the
bucket is lifted from the borehole. When the bucket is clear of the borehole,
it can be emptied by tipping. Some buckets, such as the Vicksburg hinged auger,
are equipped with hinges and a trip release, which allow the bucket to be
opened for dumping. The principal advantage of the Auger Bucket is the rapid
excavation of small- or large-diameter holes to relatively great depths.
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