Ratchet drill

Ratchet drill
Ratchet Ratch"et (-[e^]t), n. [Properly a diminutive from the same word as rack: cf. F. rochet. See 2d {Ratch}, {Rack} the instrument.] 1. A pawl, click, or detent, for holding or propelling a ratchet wheel, or ratch, etc. [1913 Webster]

2. A mechanism composed of a ratchet wheel, or ratch, and pawl. See {Ratchet wheel}, below, and 2d {Ratch}. [1913 Webster]

{Ratchet brace} (Mech.), a boring brace, having a ratchet wheel and pawl for rotating the tool by back and forth movements of the brace handle.

{Ratchet drill}, a portable machine for working a drill by hand, consisting of a hand lever carrying at one end a drill holder which is revolved by means of a ratchet wheel and pawl, by swinging the lever back and forth.

{Ratchet wheel} (Mach.), a circular wheel having teeth, usually angular, with which a reciprocating pawl engages to turn the wheel forward, or a stationary pawl to hold it from turning backward. [1913 Webster] [1913 Webster]

Note: In the cut, the moving pawl c slides over the teeth in one direction, but in returning, draws the wheel with it, while the pawl d prevents it from turning in the contrary direction. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • ratchet drill — noun : a hand drill in which the drill holder is revolved intermittently by a lever through a ratchet wheel and pawl * * * ratchet drill, a drill rotated by a ratchet wheel moved by a pawl and lever …   Useful english dictionary

  • Ratchet — Ratch et ( [e^]t), n. [Properly a diminutive from the same word as rack: cf. F. rochet. See 2d {Ratch}, {Rack} the instrument.] 1. A pawl, click, or detent, for holding or propelling a ratchet wheel, or ratch, etc. [1913 Webster] 2. A mechanism… …   The Collaborative International Dictionary of English

  • Ratchet brace — Ratchet Ratch et ( [e^]t), n. [Properly a diminutive from the same word as rack: cf. F. rochet. See 2d {Ratch}, {Rack} the instrument.] 1. A pawl, click, or detent, for holding or propelling a ratchet wheel, or ratch, etc. [1913 Webster] 2. A… …   The Collaborative International Dictionary of English

  • Ratchet wheel — Ratchet Ratch et ( [e^]t), n. [Properly a diminutive from the same word as rack: cf. F. rochet. See 2d {Ratch}, {Rack} the instrument.] 1. A pawl, click, or detent, for holding or propelling a ratchet wheel, or ratch, etc. [1913 Webster] 2. A… …   The Collaborative International Dictionary of English

  • Drill bit shank — The shank is the part of a drill bit grasped by the chuck of a drill. The cutting edges of the drill bit are at one end, and the shank is at the other. Different styles of shank/chuck combination deliver different performance, such as allowing… …   Wikipedia

  • drill — Synonyms and related words: SOP, accustom, aculeus, acumination, application, apprentice, apprenticeship, athletics, auger, basic training, bed, bit, bite, bone, boning, bore, bore bit, borer, brace and bit, brainwork, break, break in, breaking,… …   Moby Thesaurus

  • Drill — For other uses, see Drill (disambiguation). Drill scheme A drill or drill motor is a tool fitted with a cutting tool attachment or driving tool attachment, usually a drill bit or driver bit, used for drilling holes in various materials or… …   Wikipedia

  • Drill bit — For the fictional character, see Drill Bit (Transformers). For the cancelled skyscraper nicknamed Drill bit, see Chicago Spire. For the types used in drilling wells, see Well drilling. From top to bottom: Spade, lip and spur (brad point), masonry …   Wikipedia

  • auger — Synonyms and related words: aculeus, acumination, bit, bore, bore bit, borer, brace and bit, breast auger, breast drill, broach, burr, chamfer bit, corkscrew, cross bit, cusp, diamond drill, drill, drill press, gimlet, hand drill, keyway drill,… …   Moby Thesaurus

  • ручной перфоратор — перфоратор с трещоткой — [http://slovarionline.ru/anglo russkiy slovar neftegazovoy promyishlennosti/] Тематики нефтегазовая промышленность Синонимы перфоратор с трещоткой EN ratchet drill …   Справочник технического переводчика

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”