drop hammer

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English

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Noun

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drop hammer (plural drop hammers)

  1. (mechanical engineering) A heavy weight that is raised and then allowed to drop, as used for piledriving and drop-forging.
    • 1961 November, “Talking of Trains: The North Eastern's new rail-mounted piling unit”, in Trains Illustrated, page 646:
      On embankments these troughs are supported by piles driven into the ground and recent practice has been to drive them in by a drop hammer, manually operated from a railway wagon, [...].

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