What Industrial Machinery Mechanics, Machinery Maintenance Workers, and Millwrights Do
Industrial machinery mechanics, machinery maintenance workers, and millwrights install, maintain, and repair factory equipment and other industrial machinery.
Workers in this occupation must follow safety precautions and use protective equipment, such as hardhats, safety glasses, and hearing protectors. Most work full time in manufacturing facilities. However, they may be on call and work night or weekend shifts. Overtime is common.
How to Become an Industrial Machinery Mechanic, Machinery Maintenance Worker, or Millwright
Industrial machinery mechanics, machinery maintenance workers, and millwrights typically need a high school diploma. Industrial machinery mechanics and machinery maintenance workers also usually need at least a year of on-the-job training. Most millwrights go through an apprenticeship program that may last up to 4 years.
The median annual wage for industrial machinery mechanics, machinery maintenance workers, and millwrights was $52,860 in May 2019.
Overall employment of industrial machinery mechanics, machinery maintenance workers, and millwrights is projected to grow 13 percent from 2019 to 2029, much faster than the average for all occupations. Employment growth will vary by occupation.
Industrial machinery mechanics and machinery maintenance workers maintain and repair factory equipment and other industrial machinery, such as conveying systems, production machinery, and packaging equipment. Millwrights install, dismantle, repair, reassemble, and move machinery in factories, power plants, and construction sites.
Industrial machinery mechanics, machinery maintenance workers, and millwrights typically do the following:
- Read technical manuals to understand equipment and controls
- Disassemble machinery and equipment when there is a problem
- Repair or replace broken or malfunctioning components
- Perform tests and run initial batches to make sure that the machine is running smoothly
- Detect minor problems by performing basic diagnostic tests
- Test malfunctioning machinery to determine whether major repairs are needed
- Adjust and calibrate equipment and machinery to optimal specifications
- Clean and lubricate equipment or machinery
- Move machinery and equipment
Industrial machinery mechanics, also called maintenance machinists, keep machines in working order by detecting and correcting errors before the machine or the products it produces are damaged. Many of these machines are increasingly run by computers. Industrial machinery mechanics use technical manuals, their understanding of industrial equipment, and observation to determine the cause of a problem. For example, after detecting a vibration from a machine, they must decide whether it is the result of worn belts, weak motor bearings, or some other problem. They may use computerized diagnostic systems and vibration analysis techniques to help figure out the source of problems. Examples of machines they may work with are robotic welding arms, automobile assembly line conveyor belts, and hydraulic lifts.
After diagnosing a problem, the industrial machinery mechanic may take the equipment apart to repair or replace the necessary parts. Once a repair is made, mechanics test a machine to ensure that it is operating correctly.
In addition to working with hand tools, mechanics commonly use lathes, grinders, and drill presses. Many also are required to weld.
Machinery maintenance workers do basic maintenance and repairs on machines. They clean and lubricate machinery, perform basic diagnostic tests, check the performance of the machine, and test damaged machine parts to determine whether major repairs are necessary.
Machinery maintenance workers must follow machine specifications and adhere to maintenance schedules. They perform minor repairs, generally leaving major repairs to industrial machinery mechanics.
Maintenance workers use a variety of tools to do repairs and preventive maintenance. For example, they may use a screwdriver or socket wrenches to adjust a motor’s alignment, or they might use a hoist to lift a heavy printing press off the ground.
Millwrights install, maintain, and disassemble industrial machines. Putting together a machine can take a few days or several weeks.
Millwrights perform repairs that include replacing worn or defective parts of machines. They also may be involved in taking apart the entire machine, a common situation when a manufacturing plant needs to clear floor space for new machinery. In taking apart a machine, millwrights carefully disassemble, categorize, and package each part of the machine.
Millwrights use a variety of hand tools, such as hammers and levels, as well as equipment for welding, brazing, and cutting. They also use measuring tools, such as micrometers, measuring tapes, lasers, and other precision-measuring devices. On large projects, they commonly use cranes and trucks. When millwrights and managers determine the best place for a machine, millwrights use forklifts, hoists, winches, cranes, and other equipment to bring the parts to the desired location.
Industrial machinery mechanics, machinery maintenance workers, and millwrights held about 521,300 jobs in 2019. Employment in the detailed occupations that make up industrial machinery mechanics, machinery maintenance workers, and millwrights was distributed as follows:
|Industrial machinery mechanics||399,400|
|Maintenance workers, machinery||73,200|
The largest employers of industrial machinery mechanics, machinery maintenance workers, and millwrights were as follows:
|Commercial and industrial machinery and equipment (except automotive and electronic) repair and maintenance||10|
Injuries and Illnesses
Working with industrial machinery can be dangerous. To avoid injury, workers must follow safety precautions and use protective equipment, such as hardhats, safety glasses, steel-toed shoes, gloves, and earplugs.
Most industrial machinery mechanics and machinery maintenance workers are employed full time during regular business hours. However, mechanics may be on call and work night or weekend shifts. Overtime is common, particularly for mechanics.
This table shows a list of occupations with job duties that are similar to those of industrial machinery mechanics, machinery maintenance workers, and millwrights.
|Occupation||Job Duties||Entry-Level Education||Median Annual Pay, May 2019|
Electrical and Electronics Engineers
Electrical engineers design, develop, test, and supervise the manufacture of electrical equipment.
Electricians install, maintain, and repair electrical power, communications, lighting, and control systems.
|High school diploma or equivalent||$56,180|
General Maintenance and Repair Workers
General maintenance and repair workers fix and maintain machines, mechanical equipment, and buildings.
|High school diploma or equivalent||$39,080|
Machinists and tool and die makers set up and operate machine tools to produce precision metal parts, instruments, and tools.
|See How to Become One||$45,750|
Plumbers, pipefitters, and steamfitters install and repair piping fixtures and systems.
|High school diploma or equivalent||$55,160|
Welders, Cutters, Solderers, and Brazers
Welders, cutters, solderers, and brazers use hand-held or remotely controlled equipment to join, repair, or cut metal parts and products.
|High school diploma or equivalent||$42,490|
Wind Turbine Technicians
Wind turbine service technicians install, maintain, and repair wind turbines.
|Postsecondary nondegree award||$52,910|
Medical Equipment Repairers
Medical equipment repairers install, maintain, and repair patient care equipment.
For information about industrial machinery mechanics and machinery maintenance workers, visit
For information about millwrights and the precision-machined products industry, training, and apprenticeships, visit
For further information on apprenticeship programs, write to the Apprenticeship Council of your state’s labor department or to local firms that employ machinery mechanics and repairers. Apprenticeship information is also available from the U.S. Department of Labor’s Apprenticeship program online or by phone at 877-872-5627.
Bureau of Labor Statistics, U.S. Department of Labor, Occupational Outlook Handbook, Industrial Machinery Mechanics, Machinery Maintenance Workers, and Millwrights,
at https://www.bls.gov/ooh/installation-maintenance-and-repair/industrial-machinery-mechanics-and-maintenance-workers-and-millwrights.htm (visited ).