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An anvil is a basic tool, a block with a hard surface on which another object is struck. The block is as massive as is practical, because the higher the inertia of the anvil, the more efficiently it causes the energy of the striking tool to be transferred to the work piece. In most cases the anvil is used as a forging tool. Before the advent of modern welding technology, it was a primary tool of metal workers.
The great majority of modern anvils are made from steel, though other types exist.
Because anvils are very ancient tools and were at one time very commonplace, they have acquired symbolic meaning beyond their use as utilitarian objects.
The principle of the anvil also is of particular interest in biology and in ethology; the anvil being in principle one of the most basic forms of tool, its application occurs particularly widely in living organisms.
The primary work surface of the anvil is known as the face. It is generally made of hardened steel and should be flat and smooth with rounded edges for most work. Any marks on the face will be transferred to the work. Also, sharp edges tend to cut into the metal being worked and may cause cracks to form in the workpiece. The face is hardened and tempered to resist the blows of the smith's hammer so the anvil face does not deform under repeated use. A hard anvil face also reduces the amount of force lost in each hammer blow. Hammers tools and work pieces of hardened steel should never directly strike the anvil face with full force, as they may damage it, this can result in chipping or deforming of the anvil face.
The horn of the anvil is a conical projection used to form various round shapes, and is generally unhardened steel or iron. The horn is used mostly in bending operations. It also is used by some smiths as an aid in "drawing down" stock, (making it longer and thinner). Some anvils, mainly European, are made with two horns, one square and one round. Also, some anvils are made with side horns or clips for specialized work.
The table, is that area of the anvil between the "horn" and the "face". It is soft and is used for cutting; its purpose is to prevent damaging the steel fave of the anvil by conducting such operations there and so as not to damage the cutting edge of the chisel, many smiths shun this practice, as it will damage the anvil over time.
The hardie hole is a square hole into which specialized forming and cutting tools, called hardie tools, are placed. It is also used in punching and bending operations.
The pritchel hole is a small round hole that is present on most modern anvils. Some anvils have more than one. It is used mostly for punching. At times, smiths will fit a second tool to this hole to allow the smith more flexibility when using more than one anvil tool.
An anvil needs to be placed upon a sturdy base made from an impact and fire resistant material. It requires being fastened firmly to the base so it will not move when struck with a hammer. A loose anvil is extremely unsafe, as it can fall off the base and an ineffective forging tool. Common methods of attaching an anvil are spikes, chains, steel or iron straps, clips, bolts where there are holes provided, and cables. A smith would use whatever was at hand, as long as it held the anvil firmly in place. It is incorrect practice to weld an anvil to a base or drill holes into it, as many anvils are antiques; when properly used and cared for, they can last generations. The anvil should be placed as near to the forge as is convenient, generally no more than one step from the forge to prevent heat loss in the work piece.
The most common base traditionally was a hard wood log or large timber buried several feet into the floor of the forge shop floor. This was done to make the anvil immobile when heavy forging and bending were done upon the anvil. In the industrial era cast iron bases became available. They had the advantage of adding additional weight to the anvil, making it more stable while making the anvil movable. These bases are highly sought after by collectors today. When concrete became widely available, there was a trend to make steel reinforced anvil bases by some smiths, though this practice has largely been abandoned. In more modern times many anvils have been placed upon bases fabricated from steel, oftentimes a short thick section of large I-Beam. In addition, bases have been made from dimensional lumber bolted together to form a large block or steel drums full of oil-saturated sand to provide a damping effect. In recent times times tripod bases of fabricated steel have become popular with some smiths.
There are many designs for anvils, which are often tailored for a specific purpose or to meet the needs of a particular smith. For example there were anvils specifically made for farriers, general smiths cutlers, chain makers, armorers, saw tuners, coach makers, coopers, and many other types metal workers. Such designs have originated in diverse geographic locations. The common blacksmith's anvil is made of either forged or cast steel, tool steel, or wrought iron (cast iron anvils are generally shunned, as they are too brittle for repeated use, and do not return the energy of a hammer blow like steel). Historically, some anvils have been made with a smooth top working face of hardened steel welded to a cast iron or wrought iron body, though this manufacturing method is no longer in use. It has at one end a projecting conical bick (beak, horn) used for hammering curved work pieces. The other end is typically called the heel. Occasionally the other end is also provided with a bick, partly rectangular in section. Most anvils made since the late 18th century also have a hardy hole and a pritchel hole where various tools, such as the anvil-cutter or hot chisel, can be inserted and held by the anvil. Some anvils have several hardy and pritchel holes, to accommodate a wider variety of hardy tools and pritchels. An anvil may also have a softer pad for chisel work.
An anvil for a power hammer is usually supported on a massive anvil block, sometimes weighing over 800 tons for a 12-ton hammer; this again rests on a strong foundation of timber and masonry or concrete.
An anvil may have a marking indicating its weight, manufacturer, or place of origin. American-made anvils were often marked in pounds. European anvils are sometimes marked in kilograms. English anvils were often marked in hundredweight, the marking consisting of three numbers, indicating hundredweight, quarter hundredweight and pounds. For example, a 3-1-5, if such an anvil existed, would be 3x112 lb + 1x28 lb + 5 lb = 369 lb ≈ 168 kg.
Cheap anvils made from inferior steel or cast iron, which are unsuitable for serious use, have been derisively referred to as "ASOs", or "Anvil Shaped Objects". Amateur smiths have used a piece of railroad rail as a makeshift anvil.
Top quality modern anvils are made of cast or forged tool steel and are heat treated for optimum hardness and toughness.
A metalworking vise may have a small anvil integrated in its design.
Early anvils were first made of stone as a lithic stone tool, then bronze, and later wrought iron. As steel became more readily available, anvils were faced with it. This was done to give the anvil a hard face and to stop the anvil from deforming from impact. Many regional styles of anvils evolved through time from the simple block that was first used by smiths. The majority of anvils found today in the US are based on the London pattern anvil of the mid-19th century.
The wrought iron steel faced anvil was produced up until the early 20th century. Through the 19th and very early 20th centuries, this method of construction evolved to produce extremely high quality anvils. The basic process involved forge welding billets of wrought iron together to produce the desired shape. The sequence and location of the forge welds varied between different anvil makers and the kind of anvil being made. At the same time cast iron anvils with steel faces were being made in the United States. At the dawn of the 20th century solid cast steel anvils began to be produced, as well as two piece forged anvils made from closed die forgings. Modern anvils are generally made entirely from steel.
Anvils have since lost their former commonness, along with the smiths who used them. Mechanized production has made cheap and abundant manufactured goods readily available. The one-off handmade products of the blacksmith are less economically viable in the modern world, while in the past they were an absolute necessity. However, anvils are still used by blacksmiths and metal workers of all kinds in producing custom work. They are also essential to the work done by farriers.
Anvils in ethology and general biology 
Application of the principles of the anvil predate historical human practice, there being a fair number of examples among various species of animals. Some of the most thoroughly documented ethological examples of tool use by animals in the wild were of chimpanzees observed using hammers of wood or stone to crack nuts, with logs or rocks serving as anvils. Less formally, birds such as some species of thrush have been known for centuries to crack the shells of the snails they feed on, by striking them on rocks. Other species of birds have similar habits, notably some of the tropical pittas, and individual birds of many such species have their own particular anvils where their discarded shell middens accumulate.
Anvils being by some definitions "‘proto’ or ‘borderline’ tools..., ... not directly manipulated and not detached from the substrate", some workers argue that their use is less demanding of brain power than more sophisticated tools, and they accordingly are likely to be used by organisms of a wider range of organisation of the central nervous system than say, probes, hammers, hooks and scoops. The latter would be limited to species with correspondingly advanced mental powers. Certainly anvil use occurs very widely in nature, ranging from fishes that break open the shells of molluscs much as thrushes do, to sea otters that bring stones to the surface and drift on their backs, holding the stones on their chests as anvils on which they break open clams and similar hard-shelled prey. Gulls of various species, some crows, and large birds of prey smash open hard food items, such as bones and tortoises, by dropping them onto rocks.
Anvils in art and entertainment 
Anvil firing is the practice of firing an anvil into the air using gunpowder. It has been popular in California, the eastern United States and the southern United States, much like how fireworks are used today. There is a growing interest in re-enacting this "ancient tradition" in the USA, which has now spread to England.
The African Methodist Episcopal Church (AME) has the anvil in its coat of arms. The AME's first services were held in a blacksmith's shop.
Television and film 
A typical metalworker's anvil, with horn at one end and flat face at the other, is a standard prop for cartoon gags, as the epitome of a heavy and clumsy object that is perfect for dropping onto a villain. This visual metaphor is common, for example, in Warner Brothers' Looney Tunes and Merrie Melodies shorts, such as those with Wile E. Coyote and Road Runner. Animaniacs made frequent gags on the topic throughout its run, even having a kingdom named Anvilania, whose sole national product is anvils.
Anvils and ASOs were mentioned and shown in the Mythbusters episode on trying to see if hammers would shatter if made brittle enough. The Mythbusters spoke of the distinction between anvils and anvil shaped objects.
Musical instruments 
- Louis Andriessen: De Materie (Part I), which features an extended solo for two anvils
- Daniel Auber: opera Le Maçon
- Arnold Bax: Symphony No. 3
- The Beatles: "Maxwell's Silver Hammer" makes prominent use of the anvil. Ringo Starr played the anvil.
- Benjamin Britten: The Burning Fiery Furnace
- Aaron Copland: Symphony No. 3
- Don Davis: The Matrix trilogy
- Fear Factory: "Body Hammer", which features the sound of a hammer striking an anvil as percussion.
- Brad Fiedel: The Terminator
- Neil Finn: "Song of the Lonely Mountain," written for the end credits of The Hobbit: An Unexpected Journey
- Gustav Holst: Second Suite in F for Military Band, which includes a movement titled "Song of the Blacksmith"
- Nicholas Hooper: Harry Potter and the Half-Blood Prince
- James Horner: Used it extensively in Aliens, and his other films such as Flightplan, The Forgotten and Titanic
- Jean Michel Jarre: On the overture of the disc "Revolutions".
- Judas Priest: "Between The Hammer And The Anvil", which features the sound of a hammer striking an anvil for dramatic effect.
- Kansas: "On the Other Side" featured some use of the anvil. Violinist Robby Steinhardt played the anvil on the track.
- Carl Orff: Antigone
- Albert Parlow (de): "Anvil Polka"
- Howard Shore: The Lord of the Rings film trilogy
- Juan María Solare: Veinticinco de agosto, 1983 and Un ángel de hielo y fuego
- Josef Strauss: Feuerfest!, op. 269 (1869). The title means "fireproof". This was the slogan of the Wertheim fireproof safe company, which commissioned the work.
- Edgard Varèse: Ionisation
- Giuseppe Verdi: Il Trovatore, featuring the famous "Anvil Chorus"
- Richard Wagner: Der Ring des Nibelungen in Das Rheingold in scene 3, using 18 anvils tuned in F in three octaves, and Siegfried in act I, notably Siegfried's "Forging Song" (Nothung! Nothung! Neidliches Schwert!)
- William Walton: Belshazzar's Feast
- John Williams: Jaws, Star Wars Episode III: Revenge of the Sith
Wagner's Der Ring des Nibelungen is notable in using the anvil as pitched percussion. The vast majority of extant works use the anvil as unpitched. However tuned anvils are available as musical instruments, albeit unusual. These are not to be confused with the "sawyers' anvils" used to "tune" big circular saw blades. Steel anvils are used for tuning for use as musical instruments, because those based partly on cast iron and similar materials give a duller sound; this is actually valued in industry, as pure steel anvils are troublesomely noisy, though energetically more efficient.The hammer and anvil have enjoyed varying popularity in orchestral roles. Robert Donington pointed out that Sebastian Virdung notes them in his book of 1510, and Martin Agricola includes it in his list of instruments (Musica instrumentalis deudsch, 1529) largely as a compliment to Pythagoras. In pre-modern or modern times anvils occasionally appear in operatic works by Berlioz, Bizet, Gounod, Verdi, and Wagner for example. Commonly pairs of anvils tuned a third apart are used.
In practice modern orchestras commonly substitute a steel bar or other suitable steel structure that is easier to tune than an actual anvil, although a visibly convincing anvil-shaped prop may be shown as desired. In Das Rheingold Wagner scored for six little, six mid-sized, and six large anvils, but orchestras seldom can afford instrumention on such a scale.
See also 
- Hahn, Robert. Archaeology and the Origins of Philosophy. Publisher: State University of New York Press 2010. ISBN: 978-1438431659
- King James Version ISAIAH 41:7
- "Ebay Fraud: Purchasing an ASO (Anvil Shaped Object)". Anvilfire.com.
- Boesch, Christophe and Boesch, Hedwige. Optimization of Nut-Cracking with Natural Hammers by Wild Chimpanzees. Department of Ethology and Wildlife Research, University of Zurich, Switzerland 1982. Pub: Behaviour 83 pp. 265-286 1983
- Boswell, James. The Scots Magazine, Volume 43 1781 pp. 348-349
- The Quarterly Journal of Agriculture. VOL. VII. JUNE 1836— MARCH 1837. William Blackwood & Sons, Edinburgh. May be downloaded from archive.org
- Burton, Maurice; Burton, Robert. The International Wildlife Encyclopedia - Volume 19 - Page 2679 Marshall Cavendish 2002 ISBN: 978-0761472858
- Lefebvre, Louis. Reader, Simon M. Sol, Daniel. Brains, Innovations and Evolution in Birds and Primates. Brain Behav Evol 2004;63:233–246 DOI: 10.1159/000076784
- Bernardi, G. The use of tools by wrasses (Labridae). Coral Reefs (2012) 31:39 DOI 10.1007/s00338-011-0823-6
- Jones AM, Brown C, Gardner S (2011) Tool use in the tuskfish Choerodon schoenleinii? Coral Reefs. doi:10.1007/s00338-011-0790-y
- Perry, Jessica A. Variation in the frequency of tool use across and within sea otter (Enhydra lutris) populations. UC Santa Cruz Electronic Theses and Dissertations. MA thesis
- Paul V. Switzer and Daniel A. Cristol. Avian prey-dropping behavior. I. The effects of prey characteristics and prey loss Behavioral Ecology (1999) 10(3): 213-219 doi:10.1093/beheco/10.3.213
- Daniel A. Cristol and Paul V. Switzer. Avian prey-dropping behavior. II. American crows and walnuts Behavioral Ecology (1999) 10(3): 220-226 doi:10.1093/beheco/10.3.220
- "St Clements Day Celebrations".
- Scott, Derek B. (2008). Sounds of the metropolis: the nineteenth-century popular music revolution in London, New York, Paris, and Vienna, p. 139. Oxford University Press, New York. ISBN 978-0-19-530946-1.
- Donington, Robert (1970). "Music and its Instruments". University Paperbacks Third edition.
Further reading 
- Andrews, Jack (1994). New Edge of the Anvil. ISBN 1-879535-09-2.
- Hrisoulas, Jim (1987). The Complete Bladesmith: Forging Your Way to Perfection. Boulder, Colorado: Paladin Press. ISBN 0-87364-430-1.
- Postman, Richard (1998). Anvils In America. ISBN 0-9663256-0-5.
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