jackscrew

jackscrew

a. A jack in which a screw is used for lifting or exerting pressure; also,#WORD ®48¯ ®56¯ screwjack ®13126¯ ®13127¯ the helical-screw part of a jackscrew. Syn: screwjackb. A heavy screw set in the base or frame of a drill machine for the purpose of leveling the drill. Long
Source: Dictionary of Mining, Mineral, and Related Terms

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