Industry Applications

A rotary screw air compressor raises air pressure with two meshing helical rotors instead of a piston. The male (main) rotor and female (gate) rotor turn inside a close-fitting housing; as they mesh, they trap pockets of air, carry them along the rotor length, and shrink them until the air is delivered at discharge pressure.

Plastering machines, mortar pumps, and screed stations move ready-mixed cement, gypsum, and fireproofing compounds through long hoses with one pump type: a progressive cavity pump whose steel screw rotor turns inside a rubber stator. That rotor is a long, slender, multi-start helical part machined to close tolerances, and it works against silica-rich mortar every operating

Table of Contents Pharmaceutical equipment is judged against two specifications at once: the geometric one on the drawing and the sanitary one in the quality agreement. Whirling machining in pharmaceutical equipment is where the two meet. A whirling ring cuts the helical features of rotors, screws, and gears in a single pass, on surfaces that

Downhole tools, drill-string components, and progressing cavity pump rotors all depend on threads that stay accurate over long lengths and tough materials. Thread whirling in the petroleum industry has become a standard way to cut those threads because it removes the full profile in one pass while the workpiece is supported on all sides by