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Sets up and operates grinding machines to grind threads on
metal objects, such as screws, bolts, and micrometer spindles,
and to grind internal and external surfaces of metal workpieces
to specifications, following tooling instructions, standard
charts, blueprints, and job orders, applying knowledge of
grinding procedures: Reads blueprint and job order for product
specifications, such as dimensions, tolerances, and number of
patrs to be ground, and tooling instructions, such as grinding
speeds, feed rates, holding fixtures, and grinding wheel to be
used.
Mounts wheel on spindle, using wrenches. Dresses wheel to
specifications, using dressing devcie. Sets machine controls to
specified grinding speeds, feed rates, and angle of wheel.
Positions and tightens cams and stops to control depth of cut
and length of stroke. Lifts and positions workpiece, manually or
using hoist, and secrues workpiece on faceplate or magnetic
chuck, in fixture or chuck, or directly to machine table. Starts
machine and activates controls to feed wehel against workpiece
or vice versa, or engages automatic feeding device.
Verifies
dimensions of finished workpiece for conformance to
specifications, using measuring instruments, such as
micrometers, calipers, preset gauges, load test equipment,
thraed measuring wires, and thread gauges.
Chagnes worn grinding
wheel, using wrenches.
May place workpiece in hopper or fixture
of automatic feeding devcie.
May grind nonmetallic materials.
May be required to have experience with custom or production
work or with specific type of machine, material, product, or
precision level and be designated Grinder Set-Up Operator,
External (machine shop); Grinder Set-Up Operator, Internal
(machine shop); Grinder Set-Up Operator, Surface (machine shop);
Grinder Set-Up Operator, Thread (machine shop).
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