auger bit การใช้

• The bits commonly used in the brace are corkscrew-shaped auger bits.
• Irwin had bought the rights to a solid-center auger bit from a local blacksmith.
• Boring machines use twist auger bits usually ranging in size from inch to 2 inches.
• The operator raises and lowers the auger bit into the ground by turning a steering wheel.
• Irwin was founded in 1885 in Martinsville, Ohio as the Irwin Auger Bit Company by Charles Irwin, a pharmacist.
• The diameter of auger bits for hand braces is commonly expressed by a single number, indicating the size in 16ths of an inch.
• Auger bits are available in sizes from 1 / 4 to 1 1 / 2 inches in increments of 1 / 16 inch.
• There are two types of auger bits : the single helical twist, or solid center, bit, and the double helical twist, or Jennings, bit.
• Similar auger bits are made with diameters from 6 mm ( 3 / 16 in ) to 30 mm ( 1 3 / 16 in ).
• Two styles of auger bit are commonly used in hand braces : the "'Jennings "'or Jennings-pattern bit has a self-feeding screw tip, two spurs and two radial cutting edges.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.