Potter's wheel

The potter's wheel is a tool for shaping clay into round ceramic vessels, a process called throwing. It can also be used to trim excess clay from leather-hard ware—stiff but still malleable—and to add incised decoration or bands of color. While the wheel was common across the Old World, it was absent in the Pre-Columbian New World, where potters relied on hand-building methods like coiling and beating.

Before the wheel, ancient civilizations formed clay using techniques such as pinching, coiling, paddling, and shaping. Many of these methods continued to be used on or off the wheel for decoration or to create more rounded forms. Early pottery was often hand-built by coiling: rolling clay into long threads, then pinching and smoothing them together. This coiling process required all shaping energy to come from the potter's hands. Pots were frequently built on mats or leaves, which left impressions on the base and allowed the potter to rotate the vessel instead of walking around it.

The earliest potter's wheels, known as tourneys or slow wheels, likely evolved from this practice. Tournettes, in use around 3500 BC in the Near East, were turned slowly by hand or foot while coiling a pot. They produced only a limited range of vessels and were used by few potters, but they increased the efficiency of hand-powered production. By the mid-to-late 3rd millennium BC, the fast wheel emerged, operating on the flywheel principle. It stored energy in the rotating mass of a heavy stone wheel, which was kicked or pushed with a stick to build angular momentum. This enabled throwing: placing a lump of clay centrally, then squeezing, lifting, and shaping it as the wheel spun. The process left rings inside the pot and allowed for thinner walls and a wider variety of shapes, including stemmed vessels. Wheel-thrown pottery can thus be distinguished from handmade ware, and potters could produce many more pieces per hour—a step toward industrialization.

The exact origin of the potter's wheel remains unclear. Many scholars suggest the ancient Sumerians in Mesopotamia first developed it; a stone wheel from the Sumerian city of Ur, in modern-day Iraq, dates to about 3129 BC, though even earlier wheel-thrown fragments have been found nearby. However, southeastern Europe and China have also been proposed as origins. A wheel from the Cucuteni–Trypillia culture in western Ukraine, dating to the mid-5th millennium BC, is the oldest ever found, predating Mesopotamian use by several hundred years. Meanwhile, Egypt is considered a possible birthplace, where the turntable shaft was lengthened around 3000 BC and a flywheel added, kicked or pulled by hand, leading to the almost universal counterclockwise motion.

In the Iron Age, the common potter's wheel had a turning platform about one meter above the floor, connected by a long axle to a heavy flywheel at ground level. The potter kicked the flywheel with a foot to keep it spinning, leaving both hands free. This side-to-side foot motion was awkward, so an alternative using a crankshaft and lever to convert up-and-down motion into rotary motion was later invented.

In Japan, the potter's wheel appeared during the Asuka or Sueki period (552–710 CE), alongside more sophisticated wares and higher-temperature firing in rudimentary kilns. Industrialization continued through the Nara period (710–794) and into the Heian period (794–1185), bringing new glazes—green, yellowish brown, and white—and new glazing techniques. Chinese ceramic wares had a similar early development, beginning in the Neolithic era.

The techniques of jiggering and jolleying extend the potter's wheel. In jiggering, a shaped tool is lowered onto plastic clay placed on a rotating plaster mold; the tool shapes one face, the mold the other. This term is specific to flat ware like plates. A similar technique, jolleying, produces hollow ware such as cups. The potter's wheel is sometimes called a "potter's lathe," but that term is better reserved for a different machine used for turning, similar to shaping metal or wood.