Basic introduction to radial ball bearings
The radial ball bearing is a universal design that can withstand different loads at high speeds. This type of rolling bearing consists of a complete set of precision balls and cages as well as inner and outer rings. The standard radial ball bearing has a deep groove structure that can withstand radial loads from any upward direction and small axial loads. The radial ball bearings with maximum load capacity are mainly subjected to radial loads. This type of rolling bearing is available in a variety of sizes. Different sealing configurations protect the internal components of the rolling bearing and retain the grease. Radial ball bearings are widely used in the general industry, automotive industry, agriculture, chemical industry and household appliances industry.
The auger bit adds a long deep spiral flute for effective chip removal.
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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. This bit has a double flute starting from the cutting edges, and extending several inches up the shank of the bit, for waste removal.
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 1â„2 in (13 mm) up the shank before ending.
The diameter of auger bits for hand braces is commonly expressed by a single number, indicating the size in 16ths of an inch. For example, #4 is 4/16 or 1/4 in (6 mm), #6 is 6/16 or 3/8 in (9 mm), #9 is 9/16 in (14 mm), and #16 is 16/16 or 1 in (25 mm). Sets commonly consist of #4-16 or #4-10 bits.
