Machinery maintenance workers earned less than the higher skilled machinery mechanics. Median hourly earnings of machinery maintenance workers were $15.63 in 2002. The middle 50 percent earned between $12.11 and $19.81. The lowest 10 percent earned less than $9.57, and the highest 10 percent earned more than $24.19.

Earnings vary by industry and geographic region. Median hourly earnings in the industries employing the largest numbers of industrial machinery mechanics in 2002 are shown below:
 

About 26 percent of industrial machinery installation, repair, and maintenance workers, except millwrights are union members. Labor unions that represent these workers include the United Steelworkers of America; the United Automobile, Aerospace, and Agricultural Implement Workers of America; the International Association of Machinists and Aerospace Workers; the United Brotherhood of Carpenters and Joiners of America; and the International Union of Electronic, Electrical, Salaried, Machine, and Furniture Workers.