In this case I want a big hole; I use an old 3 / 4-inch plumber's auger bit, the only thing I could find long enough and wide enough to suit the purpose.
12.
In some cases, as in rough holes for carpentry, the quality of the hole does not matter, and a number of bits for fast cutting in wood exist, including spade bits and self-feeding auger bits.
13.
The "'Irwin "'or solid-center auger bit is similar, the only difference being that one of the cutting edges has only a " vestigal flute " supporting it, which extends only about up the shank before ending.
14.
He combined these ideas by building the " Turtle " which was designed to attack ships by attaching a time bomb to their hulls, while using a hand powered drill and ship auger bit to penetrate the hulls.
15.
These bits are available both in a version similar to an auger bit or brace bit, designed for low speed, high torque use with a brace or other hand drill ( pictured to the right ), or as a high speed, low torque bit meant for a power drill.
16.
The drill itself is composed of : the drill shaft, a narrow board with a hole through the center, a weight ( usually a heavy disc ) acting as a flywheel, and a length of auger bits or a simple triangular bit made to cut while rotating in both directions.
