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Power tools are classified based on their power source. Power tools (powered by electricity), pneumatic tools (powered by compressed air), liquid fuel tools (usually powered by gasoline), tools powered by gunpowder (usually using explosives, pistol), and hydraulic tools (powered by liquid pressure). Each type has some unique security issues.
Hand Tools includes a wide variety of tools, from axes to wrenches. The main danger from hand tools is hitting the tool or the material you are working with. Eye injuries are very common when using hand tools, as wood and metal shards can fly off and get caught in the eye. Some of the biggest problems are using the wrong tools for the job, or tools that are not properly maintained. Tool size is important. Some women and men with relatively small hands have difficulty handling large tools. Blunt tools make the job much harder, require more force, and can lead to more injuries. Mushroom head fleas can shatter on impact and scatter debris. A good working surface is also important. Cutting material at an awkward angle can lead to loss of balance and injury. In addition, working near flammable liquids or vapors can cause sparks from hand tools that can cause an explosion. In such cases, tools that are resistant to sparks such as brass or aluminum are required.
Power tools are generally more dangerous than hand tools because they increase the power of the tool. The biggest hazards with power tools are accidental starting, slipping and loss of balance while in use. The power source itself can cause injury or death, including electric shock from power tools and gasoline explosions from liquid fuel tools. Most power tools have guards to protect moving parts when the tool is not in use. These protective devices must be functional and must not be overridden. For example, a portable circular saw should have a top guard that covers the top half of the blade and a retractable bottom guard that covers the teeth when the saw is not in use. When the tool is done working, the retractable guard automatically retracts to cover the lower half of the blade. Power tools often have a safety switch that stops the tool when the switch is released. Other tools have locks that must be locked before the tool can work. An example is a fastening tool that must be pressed against a surface with a certain amount of pressure before it can ignite.
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