A machine guard is a fixed, movable, or interlocked barrier fitted around the moving parts of industrial machinery, gears, belts, blades, rollers, or a press's own point of operation, built to keep a worker's hands, hair, or clothing out of a hazard while still letting the machine do its job. Fixed guards are permanently bolted in place and cannot be removed without tools, suited to parts nobody needs to reach during normal operation; interlocked guards are wired to the machine's own control circuit so that opening the guard, to clear a jam or change a tool, automatically stops the machine, and will not let it restart until the guard is closed again. The point-of-operation guard, covering the exact spot where a blade cuts or a press closes, is treated as the most critical of the three because that is precisely where an operator's hands work closest to the hazard during ordinary use. Machine guarding became one of the earliest and most basic obligations industrial safety regulation placed on factory owners, since an unguarded moving part is a hazard to anyone working near the machine regardless of their own care or experience.
Facts
SignificanceRequired under the Occupational Health and Safety Act of 1970 to protect operators from point-of-operation and moving-part hazards 1 FAQs
Does a machine guard have to be attached to the machine itself?
Where possible it is affixed to the machine; if not it is secured elsewhere and must never be a hazard itself.
Where possible, yes. Under the United States general industry standard for machine guarding, 29 CFR 1910.212, guards are to be affixed to the machine where possible and secured elsewhere if attachment to the machine is not possible for any reason. The same standard adds that a guard must not itself offer an accident hazard, so a guard that traps a hand or snags clothing fails its purpose.
Connections
In Field
Source Safeguarding History - Rockford Systems, LLC
Sources
1. Safeguarding History - Rockford Systems, LLC
First Machine Guarding Laws
In 1877, Massachusetts passed the Nation's first factory inspection law
Modern Federal Regulation
The Act requires that one or more methods of machine guarding be provided to protect the operator and other employees in the area from hazards, such as those created by point of operation, rotating parts, or flying chips
In Field: Industrial Engineering, Page text
In the absence of safety regulations, manufacturers prioritized productivity over worker protection, leading to devastating consequences such as amputations, respiratory illnesses, and burns.
In Group: Workplace Safety Equipment, Page text
In the absence of safety regulations, manufacturers prioritized productivity over worker protection, leading to devastating consequences such as amputations, respiratory illnesses, and burns.
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