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C.
Repetitive Motion
REPETITIVE MOTION HAZARD
To Avoid Injury:
•
When using a power tool, you may experience discomfort in your hands, arms, shoulders, neck, or other parts of your body.
•
While using a power tool, position your body in a comfortable posture. Maintain secure footing and avoid awkward or
off-balance postures. Changing your body posture during extended tasks may help avoid discomfort and fatigue.
•
If you experience symptoms such as persistent or recurring discomfort, pain, throbbing, aching, tingling, numbness, burn-
ing sensations, or stiffness, do not ignore these warning signs. Promptly tell your employer and consult a qualified health
professional.
•
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:
1. Forceful exertions and motions
2. Extreme postures and motions
3. Repetitive exertions and motions
4. Intended duration of exertion, postures, motions, vibration, and cold
5. Insufficient rest or pauses
6. Work organization risk factors
7. 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 task, reassign user to a different job; if relief is not found contact experts skilled in treating such disorders.
•
Wrist supports and balancers should be used if it can be determined that such devices can reduce the risk of repetitive
motion disorders.
Instruction Manual
WARNING
Introduction
17
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