Verify conformance of machined work to specifications, using measuring instruments, such as calipers, micrometers, or fixed or telescoping gauges.
Study machining instructions, job orders, or blueprints to determine dimensional or finish specifications, sequences of operations, setups, or tooling requirements.
Change worn cutting tools, using wrenches.
Select and set cutting speeds, feed rates, depths of cuts, and cutting tools, according to machining instructions or knowledge of metal properties.
Install tools in spindles.
Move machine controls to lower tools to workpieces and to engage automatic feeds.
Establish zero reference points on workpieces, such as at the intersections of two edges or over hole locations.
Position and secure workpieces on tables, using bolts, jigs, clamps, shims, or other holding devices.
Observe drilling or boring machine operations to detect any problems.
Lift workpieces onto work tables either manually or with hoists or direct crane operators to lift and position workpieces.