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Entanglement hazards
Entanglement hazards can result in choking, scalping and/or lacerations if loose clothing, personal jewellery, neckware, hair or
gloves are not kept away from the tool and accessories. Gloves can become entangled with the rotating drive, causing severed or
broken fingers. Rotating drive sockets and drive extensions can easily entangle rubber-coated or metal-reinforced gloves. Do not
wear loose-fitting gloves or gloves with cut or frayed fingers. Never hold the drive, socket or drive extension. Keep hands away
from rotating drives.
Operating hazards
The use of the tool can expose the operator’s hands to hazards including crushing, impacts, cuts and abrasions and heat. Wear
suitable gloves to protect hands. Operators and maintenance personnel shall be physically able to handle the bulk, weight and
power of the tool. Hold the tool correctly; be ready to counteract normal or sudden movements and have both hands available.
Maintain a balanced body position and secure footing. In cases where the means to absorb the reaction torque are requested, it is
recommended to use a suspension arm whenever possible. If that is not possible, side handles are recommended for straightcase
and pistol-grip tools. Reaction bars are recommended for angle nutrunners. In any case, it is recommended to use a means to
absorb the reaction torque above 4 Nm for straight tools, above 10 Nm for pistol-grip tools, and above 60 Nm for angle nutrunners.
Release the start-and-stop device in the case of an interruption of the energy supply. Use only lubricants recommended by the
manufacturer. Fingers can be crushed in open-ended crow-foot nutrunners. Do not use in confined spaces and beware of crushing
hands between tool and workpiece, especially when unscrewing.
Repetitive motions hazards
When using a power tool for, the operator can experience discomfort in the hands, arms, shoulders, neck, or other parts of
the body. While using an assembly power tool for threaded fasteners, the operator should adopt a comfortable posture whilst
maintaining secure footing and avoiding awkward or off-balanced postures. The operator should change posture during extended
tasks, which can help avoid discomfort and fatigue. If the operator experiences symptoms such as persistent or recurring discom-
fort, pain, throbbing, aching, tingling, numbness, burning sensations or stiffness, these warning signs should not be ignored. The
operator should tell the employer and consult a qualified health professional.
Accessory hazards
Disconnect the assembly power tool for threaded fasteners from the energy supply before changing the inserted tool or acces-
sory. Do not touch sockets or accessories during impacting, as this increases the risk of cuts, burns or vibration injuries. Use
only sizes and types of accessories and consumables that are recommended by the assembly power tool for threaded fasteners
manufacturer. Use only impact-wrench-rated sockets in good condition, as poor condition or hand sockets and accessories used
with impact wrenches can shatter and become a projectile.
Workplace hazards
Slips, trips and falls are major causes of workplace injury. Be aware of slippery surfaces caused by the
use of the tool and also of trip hazards caused by the air line or hydraulic hose. Proceed with care in unfamiliar surroundings.
Hidden hazards, such as electricity or other utility lines, can exist. The assembly power tool for threaded fasteners is not intended
for use in potentially explosive atmospheres and is not insulated against coming into contact with electric power. Make sure there
are no electrical cables, gas pipes, etc., that can cause a hazard if damaged by use of the tool.
Dust and fume hazards
Dust and fumes generated when using assembly power tools for threaded fasteners can cause ill health (for example, cancer, birth
defects, asthma and/or dermatitis); risk assessment and implementation of appropriate controls for these hazards are essential.
Risk assessment should include dust created by the use of the tool and the potential for disturbing existing dust. Direct the exhaust
so as to minimize disturbance of dust in a dust-filled environment. Where dust or fumes are created, the priority shall be to control
them at the point of emission. All integral features or accessories for the collection, extraction or suppression of airborne dust or
fumes should be correctly used and maintained in accordance with the manufacturer’s instructions. Use respiratory protection in
accordance with employer’s instructions and as required by occupational health and safety regulations.
Noise hazards
Unprotected exposure to high noise levels can cause permanent, disabling, hearing loss and other problems, such as tinnitus
(ringing, buzzing, whistling or humming in the ears). Risk assessment and implementation of appropriate controls for these haz-
ards are essential. Appropriate controls to reduce the risk may include actions such as damping materials to prevent workpieces
from “ringing”. Use hearing protection in accordance with employer’s instructions and as required by occupational health and
safety regulations. Operate and maintain the assembly power tool for threaded fasteners as recommended in the instruction
handbook, to prevent an unnecessary increase in noise levels. If the assembly power tool for threaded fasteners has a silencer,
always ensure it is in place and in good working order when the assembly power tool for threaded fasteners is operating. Select,
maintain and replace the consumable/inserted tool as recommended in the instruction handbook, to prevent an unnecessary
increase in noise.
