Pliers

Ferreiro ou metalúrgico tradicional

Tool-pliers

Verwendung einer Elektrozange

Kneifzange HH-Harburg

Pliers slip 01CJC

Side cutters

Pliers are a hand tool used to hold objects firmly, possibly developed from tongs used to handle hot metal in Bronze Age Europe. They are also useful for bending and compressing a wide range of materials. Generally, pliers consist of a pair of metal first-class levers joined at a fulcrum positioned closer to one end of the levers, creating short jaws on one side of the fulcrum, and longer handles on the other side. This design allows the force applied by the user's hand to be amplified and focused on an object with precision. The design and construction of pliers vary depending on their application, with special types designed for specific tasks in engineering, electrical work, and jewelry making.

Types of Pliers

There are numerous types of pliers, each designed for specific applications. Some of the most common include:

• Needle-nose pliers, also known as long-nose pliers, which have long, thin jaws that make them ideal for reaching into tight spaces where regular pliers cannot fit.
• Wire cutters or diagonal pliers, which are designed to cut wire by indenting and wedging the wire apart.
• Lineman's pliers, which are used by electricians to cut, straighten, and bend wire, and even to crimp connectors.
• Slip joint pliers, which have an adjustable pivot point that allows the size of the opening between the jaws to be changed.
• Locking pliers, which are pliers that can be locked into position, using an over-center action.
• Tongue-and-groove pliers, known commonly as Channellocks (after the popular brand), have serrated jaws and are adjustable to several different sizes of grip.

Materials and Construction

Pliers are typically made from steel for strength and durability, though the composition of the steel can vary depending on the quality and the specific use of the pliers. High-quality pliers may be made from high-carbon steel that is hardened and tempered, while less expensive options might be made from cast iron or stainless steel. The handles of pliers are often coated with rubber or a similar material to provide a comfortable grip and to insulate the user from electrical shock when working with live circuits.

Usage

Pliers are used in many fields, including mechanics, electricity, and craftsmanship. Their primary function is to grip, position, tighten, loosen, and cut certain materials. Proper use of pliers requires selecting the correct type for the job, applying the right amount of force, and using them in a way that does not damage the workpiece or the pliers.

Safety

When using pliers, safety is paramount. Protective eyewear should be worn to protect against flying debris, especially when cutting wire or materials that can fragment. Additionally, ensuring that the pliers are in good condition before use can prevent accidents caused by tool failure.

Maintenance

To keep pliers in good working condition, they should be cleaned regularly to prevent rust and corrosion, especially if they are used in a moist environment or are exposed to chemicals. Lubricating the pivot point can also ensure smooth operation. Storing pliers in a dry, clean environment will extend their life and maintain their functionality.