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3.2 Operator Protection
ROTATING EQUIPMENT
To Avoid Injury:
•
Always wear eye and foot protection when operating, installing, or maintaining power tools,
and when in areas where power tools are being used, maintained, or installed. Some
applications may require the use of safety glasses and face shields. Use eye protection that
conforms to ANSI Z87.1.[3] and ANSI Z41-PT99M I/75 C/75.
•
Always stay alert when operating tools and/or their accessories. Do no operate tools and/or
their accessories while tired, under the influence of drugs, alcohol or any other mind-altering
substance.
•
Repetitive work motions or vibration may be harmful to your hands, arms, shoulders or back.
•
Use suitable protective equipment and work methods whenever an application presents a
hazard.
3.2.1 Repetitive Motion
The use of power tools may involve highly repetitive motions of the fingers, hands, wrists, and
shoulders. These repetitive motions can lead to cumulative trauma disorders (CTD). Many
personal and workplace factors can contribute to these disorders.
Currently available data have identified the following risk factors. These risk factors are not
necessarily causation factors of CTDs. The mere presence of a risk factor does not necessarily
mean there is excessive risk of injury. Generally, the greater the exposure to a single risk factor or
combination of factors the greater the risk for CTDs.
•
Forceful exertions and motions
•
Extreme postures and motions
•
Repetitive exertions and motions
•
Intended duration of exertion, postures, motions, vibration, and cold
•
Insufficient rest or pauses
•
Work organization risk factors
•
Environmental risk factors
These risk factors span job design and content, operator training, work method, work pace, work
environment, proper tool selection and other work place factors beyond the control of the tool
manufacturer. Tool owners and employers should analyze jobs for all of the risk factors identified
above and take appropriate action.
Some measures which may reduce the risk of CTDs:
•
Use minimum hand grip force consistent with proper control and safe operation.
•
Keep wrists as straight as possible.
•
Avoid repetitive movements of the hands and wrists.
•
If wrist pain, hand tingling, numbness, or other disorders of the shoulders, arm, wrist or finger
occur; notify supervisor, discontinue operation, reassign user to a different job; if relief is not
found contact experts skilled in treating such disorders.
Wrist supports, torque reaction devices, and balancers should be used if it can be determined that
such devices can reduce the risk of repetitive motion disorders.
3.2.2 Hearing Protection
Power tool operators and adjacent personnel may be exposed to excessive sound levels. The tool
in use is generally only one of many sources of noise that an operator experiences. Other tools and
machines in the area, joint assembly noise, work processes, and other ambient noise sources all
contribute to the sound level operators are exposed to.
The actual sound level an individual is exposed to and the individual's exposure time over the
work day are important factors in determining hearing protection requirements. Worker sound
level exposure can only be determined at the job site and is the responsibility of tool owners and
employers.
QPM DC Electric Tools
W A R N I N G
39
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