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Sets up and operates machine tools, such as lathes, milling
machines, boring machines, and grinders, to machine metallic and
nonmetallic workpieces according to specifications, tooling
instructions, and standard charts, applying knowledge of
machining methods: Reads blueprint or job order for product
specifications, such as dimensions and tolerances, and tooling
instructions, such as fixtures, feed rates, cutting speeds,
depth of cut, and determines sequence of operations. Selects,
positions, and secures tool in toolholder (chuck, collet, or
toolpost). Positions and secures workpiece in holding device,
machine table, chuck, centers, or fixtures, using clamps and
wrenches. Moves contorls to position tool and workpiece in
relation to each other, and to set specified feeds, speeds, and
depth of cut. Sets up fixutre or feeding device, starts machine,
and turns handwheel to feed tool to workpiece or vice versa, and
engages feed.
Turns valve handle to dierct flow of coolant or
cutting oil against tool and workpiece.
Observes opreation of
machine and verifies conformance of machined workpiece to
specifications, using measuring instruments, such as fixed
gauges, calipers, and micrometers.
Operates becnh grinder to
sharpen tools. May set up and operate machines and equipment
other than machine tools, such as welding machines and
flame-cutting equipment.
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