Rough Mill » Machine Maintenance

Each year, more than 100 workers are killed and many more are injured while repairing or maintaining machines. A coworker may start a machine that another employee is repairing. Sometimes the injured worker is the one who accidentally knocks a switch and energizes the machine while clearing a jam or cleaning the equipment.

Potential Hazard

  • Horizontal band saw

    Workers may be crushed at the point of operation, drawn into rotating parts, instantly electrocuted, or mangled by other moving parts.

Possible Solutions

  • Shut off and lockout/tagout all power sources - electrical, mechanical, pneumatic, hydraulic - during machine maintenance. This includes power that is stored in a machine, such as compressed air in a cylinder, after the machine is turned off. To achieve this, you must have a written lockout/tagout plan that, for each machine, describes all power sources and the correct procedure for shutting down, testing, and re-energizing the equipment. A plan should describe how employees will be notified when a lockout/tagout is necessary, and shall require employees to always lock out or tag out equipment, using the appropriate procedures, before performing work on the equipment.

  • Develop your energy control program by inventorying your equipment and identifying all power sources. Identify the lockout devices that you will need for your particular machines. There are many commercially available devices for locking out electrical switches, circuit breakers, valves, compressed-air lines, hydraulic equipment, and other power sources. When feasible, affected employees must be given their own lock to use during lockout procedures. If tagout devices are used in place of lockout devices, the tagout program must be as effective as the lockout program. Train all affected employees about the company's plan. The program will work only if employees understand how to implement the correctlockout/tagout procedures. OSHA's standard, 29 CFR 1910.147, establishes specific requirements for lockout/tagout programs.