- Industry: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who tends one or more single- or multiple-spindle lathe-type machines to cut and finish watch parts, such as watch plates, balance wheels, and bridges to specified thickness and surface finish. Respnsibilities include:
* Depresses pedal to open chuck or nest to clamp piece in place, or fits hole of piece over pin projecting from face of quill, exercising care to seat parts to prevent damage to diamond cutting edge.
* Starts machine and turns handwheels to move cutting edge into position and across face of part or move machine controls to start machine and engage cutting tool to automatically face parts to specifications.
* Removes piece at end of facing cut and checks thickness with precision gauges to determine that dimensions and finish meet specifications and shop standards.
* Notifies supervisor if parts do not meet specifications, of machine malfunctions, and of need for cutter replacement.
* May change and adjust cutting tools.
Industry:Professional careers
A professional who tends band-seating machine that roughens grooves (band seats) of artillery shells so that brass or copper bands affixed by banding-machine operator will secure shell and rotate it when fired. Respnsibilities include:
* Positions shell in chuck of lathe and tightens chuck, using wrench.
* Moves machine controls to start shell rotating and engage feed of knurling tool.
* Presses and releases pedal when band seat is sufficiently scored and removes processed shell from chuck.
Industry:Professional careers
A professional who tends truing machine that mills and recuts surfaces of metal lap used in grinding and polishing eyeglass lenses to specified curvature. Respnsibilities include:
* Holds lap against rotating brush to remove marks indicating number of times lap was used.
* Set scale indicators of truing machine, according to dioptric power indicated by numbers on lap, and clamps lap in chuck of machine.
* Starts machine and positions cutting blade against surface of lap, or engages automatic feed mechanism which reciprocates lap against cutting blade to shave and true surface of lap.
* Removes lap from machine chuck, and measures it for conformance to specifications, using template.
* Grooves surface of lap to retain abrasive on surface edges of lap, by hand or machine, to remove roughness caused by cutting, truing I, and grooving operations.
* Occasionally sharpens cutting blade, using grinder.
Industry:Professional careers
A professional who tends lathes, such as turret lathes, engine lathes, and chucking machines (lathes) that cut, shape, drill, bore, thread, or face metal workpieces according to specifications. Respnsibilities include:
* Lifts workpiece, manually or using hoist, and positions and secures workpiece between lathe centers, in chuck, or in holding fixture, using wrenches and clamps, or positions workpiece in automatic loading mechanism.
* Starts machine and turns handwheels to feed tools to workpiece or engages automatic feed.
* Turns valve to control flow of coolant against tool and workpiece.
* Observes machining operation to detect malfunction or excessive tool wear.
* Verifies that machined workpiece conforms to specifications, using thread, plug, and fixed gauges, dial indicators, calipers, and micrometers.
* Changes worn tools, using wrenches.
* May machine plastic or other nonmetallic materials.
* May be designated by type of machine as knurling-machine tender; tapper i.
Industry:Professional careers
A professional who tends semiautomatic lathes that face and chamfer rim, cut diameter to size, and impart finish on watch balance wheels. Respnsibilities include:
* Places balance wheel on locating pin in nest of quill, heats quill nest, wheel, and shellac stick to melt and apply shellac, using Bunsen burner.
* Places quill in holder of semiautomatic shellacking machine and presses button to start machine that heats and melts shellac.
* Presses wheel into nest and cools shellac to secure wheel in position.
* Places and clamps quill in lathe, exercising care to seat parts to prevent damage to diamond cutters.
* Presses button to start and run lathe through machining cycle.
* Removes quill from lathe, heats nest, and removes wheel, exercising care to prevent damage to wheel.
* Places wheel in alcohol to dissolve and remove shellac.
* Examines finish and gauges outside diameter of wheels to ensure specifications are met, using loupe and micrometer or fine gauge.
* Removes old shellac from quill, using Bunsen burner and brass wiping tool.
* Lubricates and cleans quill and machine as needed.
Industry:Professional careers
A professional who tends single- or multiple-spindle screw machines equipped with automatic indexing and feeding mechanisms that drill, turn, bore, thread, tap, and face metal bar stock according to specifications. Respnsibilities include:
* Loads bar stock into feeding mechanism.
* Starts machine, engages feeds, and observes machine operation.
* Changes worn cutting tools, using wrenches.
* Removes sample workpiece from machine and inspects workpiece to verify conformance to specifications, using instruments, such as preset comparator, ring and screw pinch gauges, calipers, and micrometer.
* Moves controls to adjust machine operation.
* May sharpen tools, using bench grinder.
* May machine plastic or other nonmetallic materials.
Industry:Professional careers
A professional who tends single- or multiple-spindle screw machines equipped with automatic indexing and feeding mechanisms that drill, turn, bore, thread, tap, and face metal bar stock according to specifications. Respnsibilities include:
* Loads bar stock into feeding mechanism.
* Starts machine, engages feeds, and observes machine operation.
* Changes worn cutting tools, using wrenches.
* Removes sample workpiece from machine and inspects workpiece to verify conformance to specifications, using instruments, such as preset comparator, ring and screw pinch gauges, calipers, and micrometer.
* Moves controls to adjust machine operation.
* May sharpen tools, using bench grinder.
* May machine plastic or other nonmetallic materials.
Industry:Professional careers
A professional who tends turret lathe to spot, drill, finish-recess, and rough-post watch barrel bridges. Respnsibilities include:
* Places bridge in nest of quill and turns clamping ring to tighten bridge in place.
* Depresses pedal to start machine.
* Feeds spotter, drill, and hollow mill in order against bridge by pressing indexing button which clicks each into working position.
* Loosens clamping ring and removes completed bridges.
* Verifies dimensions of post and thickness of recess with precision plug and indicator gauges.
Industry:Professional careers
A professional who threads fine wire on automatic wire-threading machine for further processing into watch screws.
Industry:Professional careers
A professional who sets up and operates variety of milling machines to mill flat or curved surfaces on metal workpieces, such as machine, tool, or die parts, analyzing specifications, and selecting tooling, according to knowledge of milling procedures. Respnsibilities include:
* Studies blueprints or layout on workpiece to determine sequence of operations and finished dimensions of workpiece.
* Lifts and positions workpiece on machine table manually or with hoist, and secures it, using clamps, bolts, or fixtures.
* Selects feed rate, cutting speed, depth of cut, and milling cutter, applying knowledge of metal properties and shop mathematics.
* Mounts milling cutter in spindle, and positions cutter and workpiece in relation to each other.
* Verifies alignment of workpiece, using measuring instruments, such as dial indicator and thickness gauge.
* Turns handwheel to feed workpiece to cutter or vice versa.
* Turns valve handle to start flow of coolant or lubricant on work area, starts machine, and engages automatic feed.
* May compute indexing ratios and set up and operate dividing head to index workpiece for such operations as milling helical cuts.
* May mount different tool in place of cutter and perform other operations, such as drilling and boring.
* May set up and operate attachments, such as pantograph mechanism to duplicate contours from models or profiles from templates, or universal head to mill at angles.
* May mill nonmetallic materials.
Industry:Professional careers
