GN 319.2 Revolving Ball Knobs

June 01, 2014

J.W. Winco Inc. offers GN 319.2 phenolic plastic revolving ball knobs, long shoulder type, tapped, in inch and metric sizes.

These RoHS-compliant revolving ball knobs can be utilized instead of other revolving handles, i.e. with handwheels. The tapped shoulder allows the ball knob to be mounted from the underside via a screw or bolt. The knob can then be easily mounted to sheet metal in a variety of thicknesses, flat bar, or castings, to create a quick cranking or turning mechanism.

The hand piece is black phenolic plastic (Duroplast PF), and the shoulder is made of zinc-plated, blue passivated steel, blind-tapped.

Related Glossary Terms

  • flat ( screw flat)

    flat ( screw flat)

    Flat surface machined into the shank of a cutting tool for enhanced holding of the tool.

  • turning

    turning

    Workpiece is held in a chuck, mounted on a face plate or secured between centers and rotated while a cutting tool, normally a single-point tool, is fed into it along its periphery or across its end or face. Takes the form of straight turning (cutting along the periphery of the workpiece); taper turning (creating a taper); step turning (turning different-size diameters on the same work); chamfering (beveling an edge or shoulder); facing (cutting on an end); turning threads (usually external but can be internal); roughing (high-volume metal removal); and finishing (final light cuts). Performed on lathes, turning centers, chucking machines, automatic screw machines and similar machines.