MACHINIST

Machinist

As a Machinist, WG-3414-11, you will perform all types of machining operations to manufacture, modify, and repair parts, support equipment, tools, and assemblies. Fabricate local manufactured items required for multiple components. Work includes bending, cutting, forming, casting, cleaning, molding, welding, sawing, machining, and assembling. Compare machine parts with drawings, technical orders, or specifications for conformance with established tolerances, fits, and surface finish. Make precision measurements using micrometer, vernier calipers, dial indicators, and gauges at various dimensions. Inspect tapered surfaces for variations by applying bearing blue and using surface plate. Determine reparability of damaged machine parts, tools, and components. Perform shop calculations such as determination of peripheral cutting speeds and settings. Determine metal identity and characteristics by subjecting metals to spark, acid, fire, magnetic, alkaline, heat, quench, and fracture tests. Test specimens for predetermined requirements of tensile, bend, shear, and impact strength using materials testing machines. Perform other duties as assigned. Sets up and operates most types of conventional and/or Computer Numerical Control (CNC) machine tools such as lathes; vertical and horizontal boring mills; bench, plane, or universal milling machines; shapers and planers; internal and external grinders, thread grinders; and radial drills. Grinds and sharpens tools, selects tools, jigs, and fixtures required to achieve specific dimensions, tolerances, and surface finishes. Sets up work in vises and between centers, uses chucks, standard faceplates, angle plate mountings, and collets. Uses mandrel and various other machine tool attachments such as rotary vises, dividing heads, taper attachments, magnetic checks, vertical milling heads, tapping attachments, and rotary tables. Adjusts and sets speeds and feeds of machinery and determines coolants, lubricants, and abrasives to be used, taking into consideration the characteristics of both the machinery and the materials to be worked. Operates machine tools to cut, drill, bore, tap, ream, shape, turn, mill, grind, hone, and lap items. Maintains dimensional accuracy during machining processes frequently, machining to tolerances that are difficult to attain or hold.