reamer

reamer
/ree"meuhr/, n.
1. any of various rotary tools, with helical or straight flutes, for finishing or enlarging holes drilled in metal.
2. any bladelike pick or rod used for scraping, shaping, or enlarging a hole: a pipe reamer.
3. a kitchen utensil for extracting and collecting juice from fruits, having a deep saucerlike base and in the center a grooved cone on which the fruit half is pressed down by hand.
4. Dentistry. a drill with a spiral blade, for enlarging root canals.
[1815-25; REAM2 + -ER1]

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Rotary cutting tool of cylindrical or conical shape, used for enlarging and finishing to accurate dimensions holes that have been drilled, bored, or cored.

A reamer cannot be used to start a hole. All reamers have lengthwise flutes or grooves; either the sides of the tool or the tip may be used for cutting. Reamers are made from high-carbon steel, high-speed steel, or cemented carbides.

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▪ tool
      rotary cutting tool of cylindrical or conical shape used for enlarging and finishing to accurate dimensions holes that have been drilled, bored, or cored. A reamer cannot be used to originate a hole. All reamers are provided with longitudinal flutes or grooves (eight are commonly used) that may be straight or helical; cutting may be done on the sides of the tool, using the sharpened edges of the apexes between the flutes, or cutting may take place on chamfered edges at the reamer's tip. The flutes permit passage of chips and allow cooling and lubricating fluid to reach the cutting edges. The two main classes of reamers are machine, or chucking, reamers and hand reamers. Machine reamers are used on machine tools such as drill presses, lathes, and screw machines. They have either straight or tapered shanks; hand reamers are slightly tapered to facilitate entry of the reamer and have a straight shank with a square end to fit a wrench. When it is necessary to enlarge reamed holes slightly, expansion reamers are available. These are split longitudinally, and their diameter can be adjusted by turning an end screw that expands internal cones. Reamers are made from high-carbon steel, high-speed steel, and cemented carbides.

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Universalium. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Reamer — Ream er ( [ e]r), n. One who, or that which, reams; specifically, an instrument with cutting or scraping edges, used, with a twisting motion, for enlarging a round hole, as the bore of a cannon, etc. [1913 Webster] …   The Collaborative International Dictionary of English

  • reamer — [rēmər] n. a person or thing that reams; specif., a) a sharp edged tool for enlarging or tapering holes b) JUICER c) an implement for scraping out the caked lining of a pipe bowl …   English World dictionary

  • Reamer — otheruses4|the metalworking tool|the kitchen utensil|Lemon reamerA reamer or ream is a tool used in machining to make existing holes dimensionally more accurate and to improve surface finish. Reamers are used mostly in the metalworking areas of… …   Wikipedia

  • reamer — A conically or cylindrically shaped tool with longitudinally cut teeth for manual or machine operation, used for precision finishing of bores. See terminal reamer tubing reamer valve guide reamer …   Dictionary of automotive terms

  • reamer — ream•er [[t]ˈri mər[/t]] n. 1) mel any of various rotary tools, with helical or straight flutes, for finishing or enlarging holes drilled in metal 2) cvb any bladelike pick or rod used for scraping, shaping, or enlarging a hole: a pipe… …   From formal English to slang

  • reamer — noun 1. a squeezer with a conical ridged center that is used for squeezing juice from citrus fruit • Syn: ↑juicer, ↑juice reamer • Derivationally related forms: ↑ream • Hypernyms: ↑squeezer 2. a drill that is used to shape or enlarge holes …   Useful english dictionary

  • reamer — noun Date: 1825 one that reams: as a. a rotating finishing tool with cutting edges used to enlarge or shape a hole b. a fruit juice extractor with a ridged and pointed center rising from a shallow dish …   New Collegiate Dictionary

  • reamer — noun a) A tool for boring a hole wider. b) A device for rendering citrus juice …   Wiktionary

  • reamer — A rotating finishing or drilling tool used to shape or enlarge a hole in bone or a tooth. [A.S. ryman, to widen] engine r. an engine mounted spirally bladed instrument, used for enlarging the root canals of teeth. intramedullary r. a rasp used… …   Medical dictionary

  • reamer — Смотри Развертка …   Энциклопедический словарь по металлургии

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