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Spike mauls are akin to sledge hammers, typically weighing from 8 to 12 pounds (4 to 5 kg) with handles 30 to 36 inches (80 to 90 cm) long. They have elongated double faced hardened steel heads. The head is typically over 12 inches (30 cm) long to allow the user to drive spikes on the opposite side of the rail without breaking the handle.
A A-grade Also aid climbing grade. The technical difficulty grading system for aid climbing (both for "original" and an adapted version for "new wave"), which goes: A0, A1, A2, A3, A4, A5 and up to A6 (for "new wave"). See C-grade. Abalakov thread Abalakov thread Also V-thread. A type of anchor used in abseiling especially in winter and in ice climbing. ABD Also assisted braking device. A term ...
A drilling hammer, [5] club hammer, lump hammer, crack hammer, mini-sledge or thor hammer is a small sledgehammer whose relatively light weight and short handle allow one-handed use. [6] It is useful for light demolition work, driving masonry nails, and for use with a steel chisel when cutting stone or metal. [ 7 ]
Shown here are: A. Ball-peen hammer B. Straight-peen hammer C. Cross-peen hammer The claw of a carpenter's hammer is frequently used to remove nails. A large hammer-like tool is a maul (sometimes called a "beetle"), a wood- or rubber-headed hammer is a mallet , and a hammer-like tool with a cutting blade is usually called a hatchet .
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The possibility of a steam hammer was noted by James Watt (1736–1819) in his 28 April 1784 patent for an improved steam engine. [12] Watt described "Heavy Hammers or Stampers, for forging or stamping iron, copper, or other metals, or other matters without the intervention of rotative motions or wheels, by fixing the Hammer or Stamper to be so worked, either directly to the piston or piston ...
An iron bloom just removed from the furnace: Surrounding it are pieces of slag that have been pounded off by the hammer. A bloomery consists of a pit or chimney with heat-resistant walls made of earth, clay, or stone. Near the bottom, one or more pipes (made of clay or metal) enter through the side walls.
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