Important Definition for tools safety at worksite

The bottom of a tool such as a circular saw that must be guarded except for when the tool is in use.
A sharp metal tool that is used to cut or chip workpiece materials. Chisels must remain clean and sharp.
A material that is very effective at conducting electricity. When using electric tools, do not wear or stand on objects that are conductors.
Full-ear coverings connected by a headband that require a perfect seal around the ear. Hair, facial hair, or facial movements may disrupt this seal.
Ear wear that protects hearing. Earplugs are inserted inside the ear to muffle outside noises.
The flow of electricity through the body. Severe electric shock can be fatal.
A power tool that is powered by electricity. Electric tools require observing electric safety guidelines.
The study of designing devices to decrease operator discomfort or fatigue and increase productivity.
A designated station in an easily accessible area in which employees may flush their faces with water in the event of an emergency.
A rigid, transparent plastic sheet that covers the worker's entire face to protect against dust or splashes. Because face shields do not protect against impacts, they are often worn with goggles.
A portable device that uses a rapid spray of chemicals to put out small fires.
A flame-resistant, tarp-like device that is used to isolate a work area and protect bystanders and nearby equipment from applications that throw sparks.
An object that can quickly catch fire if it comes in contact with sparks or fire.
A flat or raised metal disk that helps deflect mounting stresses from the hole in a grinding wheel.
A tool that is powered by fuel, usually gasoline. Fuel-powered tools require proper ventilation.
A cloud of particles suspended in a gas. Applications that emit fumes require proper ventilation.
Portable ground fault circuit interrupters. A type of switch that is disabled if the electricity should come into contact with water. GFCIs should be used whenever there is a chance for electricity to come into contact with water.
Safely connected to a neutral body, like the earth, which can absorb a stray electrical charge. Electric tools must be grounded to help prevent electric shock.
A tool that is "powered" by an operator, such as a hammer or screwdriver. Hand tools must be kept clean and sharp in order to avoid injury.
A designated station in an easily accessible area in which employees may wash their hands.
A lightweight, protective head covering, usually made of plastic, used to protect the head from impacts, bumps, and electrical shock.
A tool that is powered by a liquid. Hydraulic tools must be used within their proper specifications.
A powerful pneumatic tool that is used to chisel or hammer away at surfaces. Because of their vibrating motion, jackhammers require special safety considerations.
A safety procedure required by OSHA that takes steps to dissipate all stored energy during maintenance work. Never try to operate a machine that is under lockout.
The device on which an abrasive wheel rests. The abrasive wheel must be able to move freely without obstruction on the mounting.
A condition that occurs commonly to chipping tools where the head of the tool is flared out due to excessive use. Using tools with mushroomed heads is dangerous because pieces can fly off and hit the employee or other bystanders.
A safety guard that protects employees from coming into contact with dangerous parts of the tool. For example, a muzzle covers a nailgun until it is pressed against a workpiece.
A component, usually made of metal, with a threaded hole that mates with a bolt. Using the proper tool for tightening nuts is an important safety precaution.
Any example of various safety equipment that workers wear or use to prevent injury in the workplace. Safety glasses are common personal protective equipment.
Any place where two components meet that can cause an injury if you come into contact with the area.
A tool that is powered by compressed air.
The area where the tool comes into contact with the workpiece. Employees must never place anything in the path of the point of operation.
Sitting or standing in a proper upright position. Many ergonomic injuries are avoided by assuming proper posture.
A tool that is powered by gunpowder. Because they require special safety considerations, only approved personnel may use powder tools.
A tool that is powered by an external source, such as electricity or compressed air. Power tools must receive regular maintenance and be properly handled to avoid injury.
A breathing device worn to prevent inhalation of hazardous substances.
To rebound from a surface. Employees must make provisions to ensure that fasteners can not ricochet off a surface.
Another term used to describe a sound test for grinding wheels.
A protective screen that isolates a work area to protect bystanders and nearby equipment. Safety screens are similar to fire shields.
A raised platform on which employees can work at elevated heights.
A type of hand tool that tightens and loosens screws. Screwdrivers contain a grip on one end and a blade on the other end that corresponds to the head on the screw.
A safety device used on power tools. Sensor switches can have different designs, but the most common type allows the tool to operate while pressure is applied and does not allow the tool to operate when pressure is released.
Another term used to describe the base plate of a tool.
A test performed on an abrasive wheel to ensure that it is not cracked. If the wheel "rings" when a non-metallic object is lightly tapped on it, then it is not cracked.
The component of a tool that spins. For safety, spindles must be properly tightened and able to move freely without obstruction.
The visible labeling of a machine or equipment indicating that it is locked out and should not be used by unauthorized workers.
A designated area where extra tools and accessories are kept. The tool crib is also typically where tools can be serviced or repaired.
A safety device that grips a tool to ensure that it is properly attached to its power source.
Another term for the tool crib.
A means of providing fresh air.
A workholding device with two jaws that grip and hold a workpiece in place.
A type of hand tool that tightens and turns bolts and nuts. Wrenches contain fixed or moving jaws or a round attachment that grips the nuts or bolts.

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