- Industry: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who sets up and operates single- or multiple-spindle lathe-type screw machines equipped with automatic indexing and feeding mechanisms to machine metal bar stock, following specifications and tooling instructions and applying knowledge of screw machine operations. Respnsibilities include:
* Reads blueprint or job order for product specifications, such as dimensions, tolerances, number of parts to be machined, and tooling instructions, such as cutting speeds, feed rates, depth of cuts, and cutting tools to be used.
* Positions and secures specified collets, bushings, and stock pushers onto stock-feeding mechanism, using wrenches and screwdrivers, and loads bar stock into feeding mechanism, manually or using hoist.
* Installs and adjusts specified cams, gears, and stops to control stock and tool movements at each station.
* Positions and secures tools in toolholders, verifying positions with gauges and other measuring instruments.
* Sets cutting speeds and feed rates.
* Moves controls to cycle machine through settings, stopping machine and adjusting tool positions and machine controls to allow for operating factors, such as timing, clearance between moving parts, and chip removal.
* Starts machine, observes operation, and inspects first-run and sample workpiece to ensure machining conforms to specifications, using measuring instruments, such as plug and ring gauges, calipers, and micrometers.
* Replaces worn tools.
* May operate bench grinder to sharpen tools.
* May machine nonmetallic materials.
* May be required to have experience with particular material or product or machine of particular size, type, or trade name.
* May set up machines for other workers.
Industry:Professional careers
A professional who sets up and operates turret lathes to perform series of machining operations, such as turning, boring, threading, and facing, on metal workpieces, such as castings, forgings, and bar stock, according to specifications, tooling instructions, standard charts, and knowledge of turning procedures. Respnsibilities include:
* Reads blueprint, job order, tooling instructions, and standard charts for such specifications as dimensions, tolerances, and tooling instructions, such as type of holding fixtures, cutting speeds, feed rates, and cutting tools to be used.
* Positions and secures tools in toolholders on turret and cross-slide, using wrenches.
* Moves controls to set specified rotation speeds, feed rates, and depth of cuts.
* Positions and secures workpiece in chuck or to faceplate, using wrenches.
* Indexes turret and adjusts positions of tools at each station in relation to workpiece to assure clearance between moving parts and machining of specified dimensions and tolerances.
* Observes operation and indexes turret between operations.
* Verifies conformance of machined workpieces to specifications, using micrometers, calipers, and fixed gauges.
* Turns valve and directs flow of coolant against tool and workpiece.
* May compute such data as dimensions, rotation speeds, feed rates, and machining times, using knowledge of shop mathematics and metal properties.
* May work on nonmetallic materials, such as plastics.
* May be required to have experience with custom or production work or with particular material, product, level of precision, or machine of size, type, or trade name.
Industry:Professional careers
A professional who operates one or more previously set up multiple-spindle screw machines equipped with automatic indexing and feeding mechanism to perform series of machining operations on metal bar stock, following specifications. Respnsibilities include:
* Reads blueprint and job order for such information as dimensions, tolerances, and number of workpieces to be machined.
* Examines machine to become familiar with tooling setup.
* Loads stock into feeding mechanism.
* Starts machine and observes operation.
* Verifies conformance of sample workpieces to specifications, using preset gauges, micrometers and dial indicators.
* Replaces worn tools.
* Adjusts machine controls and changes tool settings to keep dimensions within specified tolerances.
* May operate bench grinder or cutter-grinding machine to sharpen tools.
* May machine plastics or other nonmetallic materials.
* May operate single-spindle screw machine.
* May be required to have experience with particular material or product or machine of particular size, type, or trade name.
Industry:Professional careers
A professional who operates one or more previously set up multiple-spindle screw machines equipped with automatic indexing and feeding mechanism to perform series of machining operations on metal bar stock, following specifications. Respnsibilities include:
* Reads blueprint and job order for such information as dimensions, tolerances, and number of workpieces to be machined.
* Examines machine to become familiar with tooling setup.
* Loads stock into feeding mechanism.
* Starts machine and observes operation.
* Verifies conformance of sample workpieces to specifications, using preset gauges, micrometers and dial indicators.
* Replaces worn tools.
* Adjusts machine controls and changes tool settings to keep dimensions within specified tolerances.
* May operate bench grinder or cutter-grinding machine to sharpen tools.
* May machine plastics or other nonmetallic materials.
* May operate single-spindle screw machine.
* May be required to have experience with particular material or product or machine of particular size, type, or trade name.
Industry:Professional careers
A professional who operates one or more previously set up single-spindle screw machines (type of lathe) equipped with automatic indexing and feeding mechanisms to perform series of machining operations on metal bar stock, following specifications. Respnsibilities include:
* Reads blueprint and job order for such information as dimensions, tolerances, and number of workpieces to be machined.
* Examines machine to become familiar with tooling setup.
* Loads stock into feeding mechanism manually or with hoist.
* Starts machine and observes operation.
* Verifies conformance of sample workpieces to specifications, using preset gauges, micrometers, or dial indicators.
* Adjusts machine controls and changes tool settings to keep dimensions within specified tolerances.
* Replaces worn tools.
* May operate bench grinder or cutter-grinding machine to sharpen tools.
* May machine plastics or other nonmetallic materials.
* May be required to have experience with particular material or product or machine of particular size, type, or trade name.
* Differs from screw-machine operator, production in that this work is characterized by variety, with shorter runs and less repetition.
Industry:Professional careers
A professional who operates one or more previously set up single-spindle screw machines (type of lathe) equipped with automatic indexing and feeding mechanisms to perform series of machining operations on metal bar stock, following specifications. Respnsibilities include:
* Reads blueprint and job order for such information as dimensions, tolerances, and number of workpieces to be machined.
* Examines machine to become familiar with tooling setup.
* Loads stock into feeding mechanism manually or with hoist.
* Starts machine and observes operation.
* Verifies conformance of sample workpieces to specifications, using preset gauges, micrometers, or dial indicators.
* Adjusts machine controls and changes tool settings to keep dimensions within specified tolerances.
* Replaces worn tools.
* May operate bench grinder or cutter-grinding machine to sharpen tools.
* May machine plastics or other nonmetallic materials.
* May be required to have experience with particular material or product or machine of particular size, type, or trade name.
* Differs from screw-machine operator, production in that this work is characterized by variety, with shorter runs and less repetition.
Industry:Professional careers
A professional who feeds cylindrical stock into one or more threading machines. Respnsibilities include:
* Shovels, dumps, or inserts material in hopper or feedrack of machine that automatically threads stock.
* Carries or wheels filled and empty containers, such as buckets and wheelbarrows, to and from machine.
* Notifies threading-machine setter of machine malfunctions.
* May fill tanks of lubricating oil, clean machine and work area.
Industry:Professional careers
A professional who operates one or more previously set up automatic screw machines to perform series of machining operations, such as boring, threading, and facing metal bar, rod, or wire stock to specifications to produce parts for clocks, watches, and other timing devices. Respnsibilities include:
* Reads specifications to determine dimensions, tolerances, and number of parts required.
* Loads specified stock into feeding mechanism.
* Pushes starting button, and moves clutch lever to start machine and engage gears.
* Observes machine operation and verifies conformance of workpiece to specifications, using measuring instruments, such as micrometers, calipers, scales, and go-not-go gauges.
* Makes adjustments to tool and toolholders, stock and guide tensions, and operating speed and lubricant flow to maintain machine setup, using handtools.
* May operate bench grinder to reshape or sharpen edges of cutting tools.
Industry:Professional careers
A professional who tends planetary-type, threading-cutting machine that cuts interior and exterior threads in artillery shells, so that fittings, such as fuse caps, can be attached. Respnsibilities include:
* Turns setscrews to secure position and depth of thread and to adapt compressed-air holding chuck to material.
* Positions shell in machine and tightens chuck.
* Closes switch to activate cutting tools.
* Presses levers to stop cutting tools and release chuck.
* Inspects shells, using fixed gauges.
Industry:Professional careers
A professional who tends semiautomatic turning machine to cut recess in watch balance wheel. Respnsibilities include:
* Fits center hole of balance wheel over pin protruding from face of quill (removable headstock), using tweezers.
* Fits holding ring over wheel and depresses pedal to clamp ring in place.
* Depresses pedal to start machine.
* Observes machine operation to detect malfunction.
* Lifts recessed wheel from pin, using tweezers, when machine automatically stops at end of cycle.
* Verifies contour of recess, using go-not-go gauge, depth of recess, using upright gauge, and quality of cut, using jeweler's loupe.
Industry:Professional careers
