Ava Monroe
Nails are essential for construction and manufacturing, with a history that dates back to ancient times. They are typically made from coils of metal wire, which are fed into a nail-making machine capable of producing up to 700 nails per minute. The wire is cut, formed, cleaned, finished, and packaged to create the final product. Nails come in a variety of shapes, sizes, and metals, each serving a specific purpose, from standard nails to specialized masonry nails. The manufacturing process has evolved from early blacksmithing techniques to modern rotary machines, making nails widely accessible and affordable.
| Characteristics | Values |
|---|---|
| Materials | Steel, stainless steel, iron, copper, aluminium, bronze |
| Manufacturing process | Feeding a thick, continuous steel wire into a machine; cutting to desired length; flattening one end into a head; cutting the other end into a point; smoothing, polishing or plating |
| Types | Common, finishing, box, casing, roofing, copper, D-head, double-headed, ring, spiral shank |
| Uses | Fastening objects together, especially pieces of wood; decorative use in folk art and sculpture; religious and mystical use |
| History | Nails were formerly made of bronze or wrought iron by blacksmiths and nailors; the slitting mill was introduced in England in 1590; the nail-making process was mechanised between 1790 and 1820 |
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What You'll Learn
Nail materials
Nails are typically made from low-carbon steel, but they were formerly made from bronze or wrought iron. In the past, blacksmiths and nailors would use a heated square iron rod, forging and hammering it to form a point. After reheating and cutting off, the nail would be inserted into an opening and hammered.
Today, the manufacturing process of iron wire nails involves several steps to ensure quality and consistency: raw material preparation, rolling, cutting, heading, and surface treating. The wire is drawn to the specified diameter and allowed to cool to room temperature. This controlled cooling process helps stabilize the wire's structure and properties. Monitoring instruments and gauges are used to measure the wire's diameter continuously during the drawing process. Adjustments are made as necessary to maintain accuracy.
The finished nails can be treated with polishing or galvanizing to improve their appearance and increase their resistance to corrosion. Anti-corrosion coatings are typically made of galvanic zinc. Nails can also be coated with thermoplastic to help lock them in place.
There are many different types of nails, each with a specific use. Common nails have a smooth shank and a heavy, flat head. Finishing nails have a narrow, tapered head that can be sunk below the surface of the material to produce a smooth finish. Casing nails have smoothly tapered heads, which allow for minimal damage to wood when being removed. Double-headed nails are used to fasten wood forms used in concrete pouring. The first head is driven in, leaving the second head protruding so that the nails can be easily removed once the concrete has hardened. Nails with serrations, annular grooves, spiral flutes, or helical threads are used when a stronger, more permanent grip is required.
Specialty nails are also being developed for new building materials, such as tile roofing, hardwood flooring, shingles, rain gutters, wallboard, sheet metal, and concrete.
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Nail-making machines
The first efforts to mechanise the nail-making process took place between 1790 and 1820 in England and the United States. Various machines were invented to automate and speed up the process of making nails from bars of wrought iron. For example, in the early 1700s, Christopher Polhem produced a nail-cutting machine as part of his automated factory in Sweden. These nails were known as cut nails because they were produced by cutting iron bars into rods.
Two early nail-making machines were patented by Ezekial Reed in the US in 1786 and Thomas Clifford in England in 1790. These machines cut tapered pieces from flat iron sheets, flattened the head, and formed the shank by wiggling the bar sideways. In the 1810s, iron bars were flipped over after each stroke while the cutter set was at an angle, allowing for an automatic grip of each nail, which also formed their heads. By the 19th century, the first machine to make nails from metal wire was introduced in the US, and this technique is now used to make most nails.
Today, ENKOTEC is a leading provider of high-performance nail-making machinery. Its high-speed rotary nail-making machines differ from conventional nail machines, which use a "cut-and-hammer" process to form each nail. ENKOTEC machines use a rotary principle, drawing wire into a wire-straightening section, cutting it to the desired size, and then forming the head of the nail in a continuous flow. This process allows more nails to be created per minute. ENKOTEC's ENKOnail+ series can produce up to 2,500 steel nails per minute, while the ENKOnail series runs at speeds of up to 1,000 nails per minute.
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Types of nails
There are thousands of varieties of nails, each designed for a specific use. Nails are categorised by their heads, shanks and points.
Common Nails
Common nails are the first choice for framing, construction and carpentry jobs. They have a heavy shank that provides sturdy support for framing and other rough work. The round head is visible on the surface. Common nails are used when strength and function are more important than appearance.
Box Nails
Box nails look like common nails but have a thinner shank. They are less likely to split thinner pieces of wood. Their slender shaft also means they aren't as strong, so they are not suitable for structural applications. They are often galvanised to help prevent corrosion.
Double-Headed Nails
Double-headed nails are used to fasten wood forms used in concrete pouring. The nail is driven in up to the first head, leaving the second head protruding. The protruding head allows the nails to be easily removed and the forms quickly dismantled once the concrete has hardened.
Casing Nails
Casing nails have a smoothly tapered head, in comparison to the "stepped" head of a finish nail. They are used to install casing around windows or doors. The tapered head allows the wood to be pried off later with minimal damage when repairs are needed, without the need to dent the face of the casing in order to grab and extract the nail.
Panel Board Nails
Panel board nails have small, round heads and are used for fastening wall panels to studs or furring. Some have ring shanks for holding power, and they are often available painted in different colours to match the panels being installed.
Flooring Nails
Flooring nails include nails designed for use in pneumatic nailers for installing some types of wood flooring, as well as short spiral nails that secure flooring trim and nails with longer, ringed shanks for installing underlayment or subflooring.
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Uses of nails
Nails are used extensively in construction and carpentry. They are most commonly used to fasten pieces of wood together, but they are also used with plastic, drywall, masonry, and concrete.
Nails are available in different sizes, materials, and shaft configurations, with each type serving a specific purpose. Common nails, for instance, are used for general construction, especially for framing and other structural work. They have a thick shaft, a wide head, and a diamond-shaped point. Box nails, on the other hand, have thinner shafts and are used for lighter projects. Finishing nails have a smaller, narrower head that is driven in below the material's surface, resulting in a neater appearance. They are often used for interior panelling and cabinetwork.
Roofing nails have large, flat heads that can securely hold down materials such as roofing felt, fibreboard, shingles, and sheet metal. Nails with specially worked shanks, such as ring nails and spiral shank nails, provide greater holding power and are used in subflooring to prevent floors from squeaking.
Nails are also used in temporary construction, such as formwork for pouring concrete. Double-headed nails are used for this purpose, allowing for easy removal once the concrete has set.
In the past, nails were valuable and standardised, sometimes even used as an informal medium of exchange. They were often made from bronze or wrought iron and crafted by hand by blacksmiths and nailors. Today, nails are mass-produced using modern rotary principle nail machines, making them widely available and affordable. This affordability has led to the use of nails in art, such as in folk art and sculpture, and they have even been inscribed with incantations for religious or mystical purposes.
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History of nail-making
The history of nail-making is a long and varied one, with the use of nails being deeply intertwined with human civilisation and providing essential support for building and crafting. Nails are believed to have originated in ancient Egypt, with archaeologists uncovering bronze nails in Egyptian sites dating back to around 3400 BC. These early nails were used in shipbuilding and furniture construction, showcasing their importance in creating durable structures.
In the Middle Ages, there was an increase in iron nail production, with specialised nail makers, or nailers, emerging as a distinct trade. These artisans used forges to create strong and reliable nails, which were highly valued and often reused or even used as a form of currency in barter economies. By the 12th century, blacksmiths in the Middle East had developed advanced ironworking techniques, improving the quality of nails. In the 14th century, German craftsmen further refined the process, leading to the production of standardised nails. These nails played a crucial role in the rapid expansion of European cities during the Renaissance.
During the American Revolution, England was the largest manufacturer of nails in the world. However, the American colonies experienced a nail shortage due to their independence from England, which had previously supplied them with nails. This led to an increase in nail-making within the colonies, with families even setting up small nail-manufacturing operations in their homes. Thomas Jefferson, who would become the third president of the United States, wrote in a letter: "In our private pursuits it is a great advantage that every honest employment is deemed honorable. I am myself a nail maker."
The first efforts to mechanise the nail-making process occurred between 1790 and 1820, with various machines being invented in England, the United States, and Sweden to automate and speed up production. These machines cut tapered pieces from flat iron sheets, then flattened the head. The slitting mill, pioneered in the 19th century, allowed for the mass production of nails without the need for skilled nailers. In the rural United States, blacksmiths continued to make nails from wrought iron well into the 20th century. The first machine to make nails from metal wire was introduced in the US around 1850, and this technique is now used to make most nails today.
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Frequently asked questions
Nails are slender metal shafts that are pointed at one end and flattened at the other and are used for fastening objects together.
Nails are usually made of steel but can also be made of stainless steel, iron, copper, aluminium, or bronze.
Blacksmiths and nailors used a heated square iron rod that they forged and hammered the sides of to form a point. After reheating and cutting off, the hot nail would be inserted into an opening and hammered.
Nails are made by feeding a thick, continuous steel wire into a machine where the wire is gripped, cut to the desired length, and flattened into a head by a mechanized hammer. The nail is then ejected from the machine and may be smoothed, polished, or plated.
Until the late 18th century, nails were imported from England, which was the largest manufacturer of nails in the world at the time of the American Revolution.
