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  2. Air hammer (fabrication) - Wikipedia

    en.wikipedia.org/wiki/Air_hammer_(fabrication)

    Free-standing air hammers are an adaptation of the hand-held version. An air hammer can stretch or shrink (shape) a variety of metals, from thin aircraft aluminums, all the way down to 10-gauge steel. They are also used for smoothing metal that has already been roughed, shaped or formed. [2]

  3. Pile driver - Wikipedia

    en.wikipedia.org/wiki/Pile_driver

    Concrete spun pile driving using diesel hammer in Patimban Deep Sea Port, Indonesia. A modern diesel pile hammer is a large two-stroke diesel engine. The weight is the piston, and the apparatus which connects to the top of the pile is the cylinder. Piledriving is started by raising the weight; usually a cable from the crane holding the pile ...

  4. Breaker (hydraulic) - Wikipedia

    en.wikipedia.org/wiki/Breaker_(hydraulic)

    A breaker is a powerful percussion hammer fitted to an excavator for demolishing hard (rock or concrete) structures. It is powered by an auxiliary hydraulic system from the excavator, which is fitted with a foot-operated valve for this purpose.

  5. Core drill - Wikipedia

    en.wikipedia.org/wiki/Core_drill

    A modern core drill is a drill specifically designed to remove a cylinder of material, much like a hole saw. The material left inside the drill bit is referred to as the core. Core drills used in metal are called annular cutters. Core drills used for concrete and hard rock generally use industrial diamond grit as the abrasive material and may ...

  6. Jackhammer - Wikipedia

    en.wikipedia.org/wiki/Jackhammer

    The sound of the hammer blows, combined with the explosive air exhaust, makes pneumatic jackhammers dangerously loud, emitting more than 120 dB SPL near the operator’s ears. [23] Sound-blocking earmuffs and earplugs must be worn by the operator to prevent a form of hearing loss, of which tinnitus is the main symptom .

  7. Down-the-hole drill - Wikipedia

    en.wikipedia.org/wiki/Down-The-Hole_Drill

    The hammer body gives straight and stable guidance of the drill bit. There are three types of hammers, depending on the actuation fluid: Air hammers have first been developed to drill hard rock but are limited to shallow holes (< 200m); Water hammers have been developed by a swedish company called Wassara. [1] A lost water flow (between 55 and ...