An attachment to a cultivator that pulverizes the soil.

A structure on the shaft of an electric rotating machine that supports the core or poles of the rotor, consisting of a hub, spokes, and rim, or some similar arrangement.

1. The part of an ejector mechanism which operates ejector pins in a molding press.

2. In extrusion, the membranes which support a mandrel within the head-die assembly.

A highly flexible perforated or corrugated disk used to center the voice coil of a dynamic loudspeaker with respect to the pole piece without appreciably hindering in-and-out motion of the voice coil and its attached diaphragm.

The common name for arachnids comprising the order Araneida.

In a universal joint, a part with four projections that is pivoted between the forked ends of two shafts and transmits motion between the shafts. Also known as cross.

In founding, a device that consists of a frame with radiating arms or members and is used for strengthening a core or mold.

A steel block with a tapered opening which permits passage of pipe during movement into or from a well; designed to hold pipe suspended in the well when the slips are placed in the tapered opening and in contact with the pipe.