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F-clamps. An F-clamp, also known as a bar clamp or speed clamp, is a type of clamp. The name comes from its "F" shape. This tool is used in woodworking while more permanent attachment is being made with screws or glue, or in metalworking to hold pieces together for welding or bolting. F-clamps are similar to but distinct from C-clamps and pipe ...
Top: Pipe clamp; Upper row: F-clamp or bar clamp, one-handed bar clamp ("Quick Grip"), wooden handscrew; Lower row: spring clamp, C-clamp (G-clamp ), wooden cam clamp. A clamp is a fastening device used to hold or secure objects tightly together to prevent movement or separation through the application of inward pressure.
A ratchet (occasionally spelled rachet) is a mechanical device that allows continuous linear or rotary motion in only one direction while preventing motion in the opposite direction. Ratchets are widely used in machinery and tools. The word ratchet is also used informally to refer to a ratcheting socket wrench.
Breaker bar. A breaker bar (also known as a power bar) is a long non-ratcheting bar that is used with socket wrench-style sockets.They are used to break loose very tight fasteners because their additional length allows the same amount of force to generate significantly more torque than a standard length socket wrench.
Power Bar: This tool is a long non-ratcheting bar that allows the user to impart considerable torque to fasteners, especially in cases where corrosion has resulted in a difficult-to-loosen part. socket crowfoot wrench crow's-foot wrench: crow's foot: A type of wrench designed to use the same drive sizes as socket wrenches, but non-cylindrical ...
Some Johnson bars have a fully ratcheting mechanism, some just a series of detents, and others yet simply engaged and disengaged positions. A common example is the Johnson bar-controlled parking brake found on many trucks and buses. Johnson bar is also the North American term for a steam engine's reversing lever, used to control the valve gear ...
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