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A crowbar, also called a wrecking bar, pry bar or prybar, pinch-bar, or occasionally a prise bar or prisebar, colloquially, in Britain and Australia sometimes called a jemmy or jimmy (also called jemmy bar), gooseneck, or pig foot, is a
A crowbar, also called a wrecking bar, pry bar or prybar, pinch-bar, or occasionally a prise bar or prisebar, colloquially, in Britain and Australia sometimes called a jemmy or jimmy (also called jemmy bar), gooseneck, or pig foot, is a tool
A tool is an object that can extend an individual's ability to modify features of the surrounding environment or help them accomplish a particular task. Although many animals use simple tools, only human beings, whose use of stone tools dates ba ...
consisting of a metal bar with a single curved end and flattened points, often with a small fissure on one or both ends for removing nails or to force apart two objects. Crowbars are commonly used to open nailed wooden crates or pry apart boards.
The design can be used as any of the three lever classes. The curved end is usually used as a first-class lever, and the flat end as a second-class lever.
Designs made from thick flat steel bar are often referred to as utility bars.
Materials and construction
Normally made of medium-carbonsteel
Steel is an alloy made up of iron with added carbon to improve its strength and fracture resistance compared to other forms of iron. Many other elements may be present or added. Stainless steels that are corrosion- and oxidation-resistant ty ...
, crowbars can alternatively be made from titanium
Titanium is a chemical element with the symbol Ti and atomic number 22. Found in nature only as an oxide, it can be reduced to produce a lustrous transition metal with a silver color, low density, and high strength, resistant to corrosion in ...
, which has the advantage of being lighter.
Commonly crowbars are forged from long steel products In steel industry terminology long steel products or long products refers to steel products including wire, rod, rail, and bars as well as types of steel structural sections and girders.
Overview
The term long products may include hot rolled bar, c ...
, either hexagonal or sometimes cylindrical stock. Alternative designs may be forged with a rounded I-shaped cross-section shaft. Versions using relatively wide flat steel bar are often referred to as ''Utility bar''s.
Etymology and usage
The acceptedetymology
Etymology ()The New Oxford Dictionary of English (1998) – p. 633 "Etymology /ˌɛtɪˈmɒlədʒi/ the study of the class in words and the way their meanings have changed throughout time". is the study of the history of the Phonological chan ...
identifies the first component of the word ''crowbar'' with the bird-name "crow", perhaps due to the crowbar's resemblance to the feet or beak of a crow. The first attestation of the word is dated back to circa 1400. They also were called simply ''crows'', or ''iron crows''; William Shakespeare
William Shakespeare ( 26 April 1564 – 23 April 1616) was an English playwright, poet and actor. He is widely regarded as the greatest writer in the English language and the world's pre-eminent dramatist. He is often called England's nation ...
used the term ''iron crow'' in many places, including his play ''Romeo and Juliet
''Romeo and Juliet'' is a Shakespearean tragedy, tragedy written by William Shakespeare early in his career about the romance between two Italian youths from feuding families. It was among Shakespeare's most popular plays during his lifetim ...
'', Act 5, Scene 2: "Get me an iron crow and bring it straight unto my cell."
In Daniel Defoe
Daniel Defoe (; born Daniel Foe; – 24 April 1731) was an English writer, trader, journalist, pamphleteer and spy. He is most famous for his novel ''Robinson Crusoe'', published in 1719, which is claimed to be second only to the Bible in its ...
's 1719 novel '' Robinson Crusoe'', the protagonist uses crowbars as pickaxes but refers to these tools as iron crows: "As for the pickaxe, I made use of the iron crows, which were proper enough, though heavy."
Types
Other types of crowbar: *Alignment pry bar, also referred to as Sleeve bar *Cat’s claw pry bar, more simply known as Claw bar *Digging pry bar *Flat pry bar *Gooseneck pry bar *Heavy-duty pry bar *Molding pry bar *Rolling head pry barSee also
* Digging bar * Halligan bar *Tire iron
A tire iron (also tire lever or tire spoon) is a specialized metal tool used in working with tires. Tire irons have not been in common use for automobile tires since the shift to the use of tubeless tires in the late 1950s.
Bicycle tire irons ...
References
{{DEFAULTSORT:Crowbar (Tool) Hand tools Woodworking hand tools Mechanical hand tools Half-Life (series)