Many manufacturers are turning to computer-controlled rather than cam-controlled operations, because of the longer set-up time required for cam-driven machines and the level of expertise required to operate them.
United Technologies Automotive Inc. Engineered Systems Div. led the industry with $975 million in 1997 sales, Cerro Metal Products Co and the Kurt Manufacturing Co.
The concept of a screw dates back as far the third century B.C., when the Greek mathematician Archimedes designed a water-powered, screw-driven system to lift water.
Establishments primarily engaged in manufacturing automatic or hand screw machine products from rod, bar, or tube stock of metal, fiber, plastics, or other material.
More than 1,600 companies employed more than 56,000 highly skilled workers throughout North America in the late 1990s.
332721 (Precision Tuned Product Manufacturing) is the NAICS code.
Three types of screw machines are used by manufacturers: swiss, single-spindle, and multiple-spindle machines.
The simple machine found on the bottom of a bathtub is a screw. This is typically represented by the drain plug mechanism, which operates by twisting a screw to open or close the drain. When turned, it allows water to flow out or be retained in the tub, demonstrating the function of a screw in changing rotational motion into linear movement.
Screw
Manufacturers are located primarily in the industrialized sectors of the Northeast and Midwest and near aerospace manufacturers in the West.
A machine screw typically has a slotted or Phillips drive whereas a cap screw typically has a socket or torx head.
Screw
A screw.