When a machine breaks down in a plant or factory, not only is the machine idle, but raw materials and human resources are wasted. It is the industrial machinery repairer's job to prevent these costly breakdowns and to make repairs and quickly as possible. This includes keeping machines well oiled and greased, and periodically cleaning parts.
Repairers regularly inspect machinery and check performance.
They use tools such as micrometers, calipers, and depth gauges to measure and align all parts. For example, forearms on industrial robots in motor vehicle manufacturing plants need frequent adjustment, and gears, bearings, and other mechanical parts have to be aligned and lubricated. When repairs become necessary, the maintenance mechanic must first locate the specific cause of the problem. This requires knowledge reinforced by experience. For example, after hearing a vibration from a machine, the mechanic must decide whether it is due to worn belts, weak motor bearings, or any number of other possibilities.