Job Duties Custom List 51-4041.00 — Machinists
- Install experimental parts or assemblies, such as hydraulic systems, electrical wiring, lubricants, or batteries into machines or mechanisms.
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- Fasten or install piping, fixtures, or wiring and electrical components to form assemblies or subassemblies, using hand tools, rivet guns, or welding equipment.
- Assemble systems of gears by aligning and meshing gears in gearboxes.
- Read and interpret assembly blueprints or specifications manuals, and plan assembly or building operations.
- Inspect, operate, and test completed products to verify functioning, machine capabilities, or conformance to customer specifications.
- Position or align components for assembly, manually or using hoists.
- Set and verify parts clearances.
- Verify conformance of parts to stock lists or blueprints, using measuring instruments such as calipers, gauges, or micrometers.
- Remove rough spots and smooth surfaces to fit, trim, or clean parts, using hand tools or power tools.
- Lay out and drill, ream, tap, or cut parts for assembly.
- Rework, repair, or replace damaged parts or assemblies.
- Set up and operate metalworking machines, such as milling or grinding machines, to shape or fabricate parts.
- Maintain and lubricate parts or components.
- Fasten or install piping, fixtures, or wiring and electrical components to form assemblies or subassemblies, using hand tools, rivet guns, or welding equipment.
- Assemble systems of gears by aligning and meshing gears in gearboxes.
- Install or calibrate electrical or mechanical equipment, such as motors, engines, switchboards, relays, switch gears, meters, pumps, hydraulics, or flood channels.
- Connect metal parts or components in hydroelectric plants by welding, soldering, riveting, tapping, bolting, bonding, or screwing.
- Operate high voltage switches or related devices in hydropower stations.
- Identify or address malfunctions of hydroelectric plant operational equipment, such as generators, transformers, or turbines.
- Inspect water-powered electric generators or auxiliary equipment in hydroelectric plants to verify proper operation or to determine maintenance or repair needs.
- Implement load or switching orders in hydroelectric plants, in accordance with specifications or instructions.
- Start, adjust, or stop generating units, operating valves, gates, or auxiliary equipment in hydroelectric power generating plants.
- Perform preventive or corrective containment or cleanup measures in hydroelectric plants to prevent environmental contamination.
- Maintain or repair hydroelectric plant electrical, mechanical, or electronic equipment, such as motors, transformers, voltage regulators, generators, relays, battery systems, air compressors, sump pumps, gates, or valves.
- Operate hydroelectric plant equipment, such as turbines, pumps, valves, gates, fans, electric control boards, or battery banks.
- Communicate status of hydroelectric operating equipment to dispatchers or supervisors.
- Monitor hydroelectric power plant equipment operation and performance, adjusting to performance specifications, as necessary.
- Take readings and record data, such as water levels, temperatures, or flow rates.
- Lift and move loads, using cranes, hoists, and rigging, to install or repair hydroelectric system equipment or infrastructure.
- Maintain logs, reports, work requests, or other records of work performed in hydroelectric plants.
- Change oil, hydraulic fluid, or other lubricants to maintain condition of hydroelectric plant equipment.
- Perform tunnel or field inspections of hydroelectric plant facilities or resources.
- Erect scaffolds, platforms, or hoisting frames to access hydroelectric plant machinery or infrastructure for repair or replacement.
- Cut, bend, or shape metal for applications in hydroelectric plants, using equipment such as hydraulic benders or pipe threaders.
- Splice or terminate cables or electrical wiring in hydroelectric plants.
- Test and repair or replace electrical equipment, such as circuit breakers, station batteries, cable trays, conduits, or control devices.
- Install or calibrate electrical or mechanical equipment, such as motors, engines, switchboards, relays, switch gears, meters, pumps, hydraulics, or flood channels.
- Connect metal parts or components in hydroelectric plants by welding, soldering, riveting, tapping, bolting, bonding, or screwing.
- Install mechanical linkages and actuators, using tensiometers to verify tension of cables.
- Align, fit, assemble, connect, or install system components, using jigs, fixtures, measuring instruments, hand tools, or power tools.
- Splice cables, using clamps and fittings, or reweave cable strands.
- Assemble parts, fittings, or subassemblies on aircraft, using layout tools, hand tools, power tools, or fasteners, such as bolts, screws, rivets, or clamps.
- Read blueprints, illustrations, or specifications to determine layouts, sequences of operations, or identities or relationships of parts.
- Attach brackets, hinges, or clips to secure or support components or subassemblies, using bolts, screws, rivets, chemical bonding, or welding.
- Inspect or test installed units, parts, systems, or assemblies for fit, alignment, performance, defects, or compliance with standards, using measuring instruments or test equipment.
- Adjust, repair, rework, or replace parts or assemblies to ensure proper operation.
- Cut, trim, file, bend, or smooth parts to ensure proper fit and clearance.
- Fabricate parts needed for assembly or installation, using shop machinery or equipment.
- Layout and mark reference points and locations for installation of parts or components, using jigs, templates, or measuring and marking instruments.
- Clean, oil, or coat system components, as necessary, before assembly or attachment.
- Assemble prefabricated parts to form subassemblies.
- Set, align, adjust, or synchronize aircraft armament or rigging or control system components to established tolerances or requirements, using sighting devices and hand tools.
- Join structural assemblies, such as wings, tails, or fuselage.
- Position and align subassemblies in jigs or fixtures, using measuring instruments and following blueprint lines and index points.
- Assemble prototypes or integrated-technology demonstrators of new or emerging environmental technologies for aircraft.
- Swage fittings onto cables, using swaging machines.
- Manually install structural assemblies or signal crane operators to position assemblies for joining.
- Set up or operate machines or systems to crimp, cut, bend, form, swage, flare, bead, burr, or straighten tubing, according to specifications.
- Place and connect control cables to electronically controlled units, using hand tools, ring locks, cotter keys, threaded connectors, turnbuckles, or related devices.
- Clean aircraft structures, parts, or components, using aqueous, semi-aqueous, aliphatic hydrocarbon, or organic solvent cleaning products or techniques to reduce carbon or other harmful emissions.
- Install accessories in swaging machines, using hand tools.
- Mark identifying information on tubing or cable assemblies, using etching devices, labels, rubber stamps, or other methods.
- Verify dimensions of cable assemblies or positions of fittings, using measuring instruments.
- Weld tubing and fittings or solder cable ends, using tack welders, induction brazing chambers, or other equipment.
- Fit and fasten sheet metal coverings to surface areas or other sections of aircraft prior to welding or riveting.
- Capture or segregate waste material, such as aluminum swarf, machine cutting fluid, or solvents, for recycling or environmentally responsible disposal.
- Cut cables and tubing, using master templates, measuring instruments, and cable cutters or saws.
- Monitor robotic assembly equipment, such as snake-arm robots, used to assemble, seal, or swage aircraft structures.
- Install mechanical linkages and actuators, using tensiometers to verify tension of cables.
- Align, fit, assemble, connect, or install system components, using jigs, fixtures, measuring instruments, hand tools, or power tools.
- Splice cables, using clamps and fittings, or reweave cable strands.
- Pack or fold insulation between panels.
- Assemble parts or units, and position, align, and fasten units to assemblies, subassemblies, or frames, using hand tools and power tools.
- Inspect, test, and adjust completed units to ensure that units meet specifications, tolerances, and customer order requirements.
- Position, align, and adjust parts for proper fit and assembly.
- Connect cables, tubes, and wiring, according to specifications.
- Measure parts to determine tolerances, using precision measuring instruments such as micrometers, calipers, and verniers.
- Read blueprints and specifications to determine component parts and assembly sequences of electromechanical units.
- Attach name plates and mark identifying information on parts.
- Disassemble units to replace parts or to crate them for shipping.
- File, lap, and buff parts to fit, using hand and power tools.
- Clean and lubricate parts and subassemblies, using grease paddles or oilcans.
- Operate or tend automated assembling equipment, such as robotics and fixed automation equipment.
- Drill, tap, ream, countersink, and spot-face bolt holes in parts, using drill presses and portable power drills.
- Operate small cranes to transport or position large parts.
- Pack or fold insulation between panels.
- Assemble parts or units, and position, align, and fasten units to assemblies, subassemblies, or frames, using hand tools and power tools.
- Assemble equipment, and attach pipes, fittings, or valves, using hand tools.
- Record temperatures, amounts of materials processed, or test results on report forms.
- Monitor pressure gauges, ammeters, flowmeters, thermometers, or products, and adjust controls to maintain specified conditions, such as feed rate, product consistency, temperature, air pressure, and machine speed.
- Read dials and gauges on panel control boards to ascertain temperatures, alkalinities, and densities of mixtures, and turn valves to obtain specified mixtures.
- Start machinery, such as pumps, feeders, or conveyors, and turn valves to heat, admit, or transfer products, refrigerants, or mixes.
- Correct machinery malfunctions by performing actions such as removing jams, and inform supervisors of malfunctions as necessary.
- Measure or weigh specified amounts of ingredients or materials, and load them into tanks, vats, hoppers, or other equipment.
- Adjust machine or freezer speed and air intake to obtain desired consistency and amount of product.
- Weigh packages and adjust freezer air valves or switches on filler heads to obtain specified amounts of product in each container.
- Inspect and flush lines with solutions or steam, and spray equipment with sterilizing solutions.
- Load and position wrapping paper, sticks, bags, or cartons into dispensing machines.
- Sample and test product characteristics such as specific gravity, acidity, and sugar content, using hydrometers, pH meters, or refractometers.
- Start agitators to blend contents, or start beater, scraper, and expeller blades to mix contents with air and prevent sticking.
- Place or position containers into equipment, and remove containers after completion of cooling or freezing processes.
- Scrape, dislodge, or break excess frost, ice, or frozen product from equipment to prevent accumulation, using hands and hand tools.
- Activate mechanical rakes to regulate flow of ice from storage bins to vats.
- Stir material with spoons or paddles to mix ingredients or allow even cooling and prevent coagulation.
- Position molds on conveyors, and measure and adjust level of fill, using depth gauges.
- Insert forming fixtures, and start machines that cut frozen products into measured portions or specified shapes.
- Assemble equipment, and attach pipes, fittings, or valves, using hand tools.
- Install boilers, containers, and other structures.
- Verify conformance of workpieces to specifications, using squares, rulers, and measuring tapes.
- Align and fit parts according to specifications, using jacks, turnbuckles, wedges, drift pins, pry bars, and hammers.
- Move parts into position, manually or with hoists or cranes.
- Position, align, fit, and weld parts to form complete units or subunits, following blueprints and layout specifications, and using jigs, welding torches, and hand tools.
- Study engineering drawings and blueprints to determine materials requirements and task sequences.
- Set up and operate fabricating machines, such as brakes, rolls, shears, flame cutters, grinders, and drill presses, to bend, cut, form, punch, drill, or otherwise form and assemble metal components.
- Lay out and examine metal stock or workpieces to be processed to ensure that specifications are met.
- Tack-weld fitted parts together.
- Lift or move materials and finished products, using large cranes.
- Remove high spots and cut bevels, using hand files, portable grinders, and cutting torches.
- Mark reference points onto floors or face blocks and transpose them to workpieces, using measuring devices, squares, chalk, and soapstone.
- Set up face blocks, jigs, and fixtures.
- Position or tighten braces, jacks, clamps, ropes, or bolt straps, or bolt parts in position for welding or riveting.
- Locate and mark workpiece bending and cutting lines, allowing for stock thickness, machine and welding shrinkage, and other component specifications.
- Erect ladders and scaffolding to fit together large assemblies.
- Design and construct templates and fixtures, using hand tools.
- Hammer, chip, and grind workpieces to cut, bend, and straighten metal.
- Straighten warped or bent parts, using sledges, hand torches, straightening presses, or bulldozers.
- Smooth workpiece edges and fix taps, tubes, and valves.
- Preheat workpieces to make them malleable, using hand torches or furnaces.
- Heat-treat parts, using acetylene torches.
- Direct welders to build up low spots or short pieces with weld.
- Install boilers, containers, and other structures.
- Install burners and auxiliary equipment, using hand tools.
- Operate or tend stationary engines, boilers, and auxiliary equipment, such as pumps, compressors, or air-conditioning equipment, to supply and maintain steam or heat for buildings, marine vessels, or pneumatic tools.
- Activate valves to maintain required amounts of water in boilers, to adjust supplies of combustion air, and to control the flow of fuel into burners.
- Monitor boiler water, chemical, and fuel levels, and make adjustments to maintain required levels.
- Analyze problems and take appropriate action to ensure continuous and reliable operation of equipment and systems.
- Observe and interpret readings on gauges, meters, and charts registering various aspects of boiler operation to ensure that boilers are operating properly.
- Maintain daily logs of operation, maintenance, and safety activities, including test results, instrument readings, and details of equipment malfunctions and maintenance work.
- Test boiler water quality or arrange for testing and take necessary corrective action, such as adding chemicals to prevent corrosion and harmful deposits.
- Monitor and inspect equipment, computer terminals, switches, valves, gauges, alarms, safety devices, and meters to detect leaks or malfunctions and to ensure that equipment is operating efficiently and safely.
- Switch from automatic to manual controls and isolate equipment mechanically and electrically to allow for safe inspection and repair work.
- Perform or arrange for repairs, such as complete overhauls, replacement of defective valves, gaskets, or bearings, or fabrication of new parts.
- Adjust controls and/or valves on equipment to provide power, and to regulate and set operations of system or industrial processes.
- Clean and lubricate boilers and auxiliary equipment and make minor adjustments as needed, using hand tools.
- Develop operation, safety, and maintenance procedures or assist in their development.
- Test electrical systems to determine voltages, using voltage meters.
- Contact equipment manufacturers or appropriate specialists when necessary to resolve equipment problems.
- Weigh, measure, and record fuel used.
- Receive instructions from steam engineers regarding steam plant and air compressor operations.
- Check the air quality of ventilation systems and make adjustments to ensure compliance with mandated safety codes.
- Provide assistance to plumbers in repairing or replacing water, sewer, or waste lines, and in daily maintenance activities.
- Fire coal furnaces by hand or with stokers and gas- or oil-fed boilers, using automatic gas feeds or oil pumps.
- Supervise the work of assistant stationary engineers, turbine operators, boiler tenders, or air conditioning and refrigeration operators and mechanics.
- Investigate and report on accidents.
- Operate mechanical hoppers and provide assistance in their adjustment and repair.
- Ignite fuel in burners, using torches or flames.
- Install burners and auxiliary equipment, using hand tools.
