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J.W. Winco Inc. offers EN 5337.9 technopolymer plastic lockable safety five-lobed knobs, with tapped brass insert, in metric sizes. These RoHS-compliant safety five lobed knobs are temperature resistant to 100° C (215° F), as well as resistant to solvents, oils, grease and other chemical agents. To engage and release, the key must be inserted and turned by 180°, creating a formlock between the handle and the tapped insert. Turning the key back by 180° will release the connection. The key can be inserted and pulled off in both end positions, and two keys per knob are included.
The hand knob is made from a special glass-fiber-reinforced technopolymer plastic featuring a black matte finish, with the underside plastic cover ultrasonically welded to the handle body. The tapped insert is brass, molded-in, with a zinc die cast lock mechanism, while the key is brass and nickel plated, with a plastic grip.
Related Glossary Terms
- 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.
