A professional who tends grinding machines that grind internal and external surfaces of metal workpieces to specifications. Respnsibilities include:

• Starts machine, places workpiece in holding fixture or hopper, and engages automatic feeding device.
• Observes machine operation, and removes and inspects finished workpiece to verify conformance to specifications, using measuring instruments, such as preset gauges, calipers, micrometers, and load test equipment.
• Replaces worn grinding wheel, using handtools.
• Dresses wheel, using preset dressing device.
• May move controls to adjust depth of wheel cut, angle between workpiece and grinding wheel, wheel rotation speed, and feed rate.
• May grind nonmetallic workpieces.
• May prepare production records.
• May be designated centerless-grinder tender; double-spindle-disk grinder tender, spring end; external-grinder tender; internal-grinder tender; knife glazer; surface-grinder tender.