Verbos Irregulares

Lathe
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Not to be confused with Lath, a thin piece of wood.
For other uses, see Lathe (disambiguation).

A metalworking lathe from 1911 showing component parts.
a = bed, b = carriage (with cross-slide and toolpost), c = headstock, d = back gear (other geartrain nearby below drives leadscrew), e = cone pulley for belt drivefrom an external power source, f = faceplate mounted on spindle, g = tailstock. h = leadscrew.
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A lathe ( /ˈleɪð/) is a machine tool which rotates the workpiece on its axis to perform variousoperations such as cutting, sanding, knurling, drilling, or deformation with tools that are applied to the workpiece to create an object which has symmetry about an axis of rotation.
Lathes are used in woodturning, metalworking, metal spinning, Thermal spraying/ parts reclamation, and glass-working. Lathes can be used to shape pottery, the best-known design being the potter's wheel. Most suitablyequipped metalworking lathes can also be used to produce most solids of revolution, plane surfaces and screw threads or helices. Ornamental lathes can produce three-dimensional solids of incredible complexity. The material can be held in place by either one or two centers, at least one of which can be moved horizontally to accommodate varying material lengths. Other work-holding methods includeclamping the work about the axis of rotation using a chuck or collet, or to a faceplate, using clamps or dogs.
Examples of objects that can be produced on a lathe include candlestick holders, gun barrels, cue sticks, table legs, bowls, baseball bats, musical instruments (especially woodwind instruments), crankshafts, and camshafts.
Contents[hide] * 1 History * 2 Description * 2.1 Parts* 2.2 Accessories * 2.3 Modes of use * 2.4 Varieties * 3 Major categories * 3.1 Woodworking lathes * 3.2 Metalworking lathes * 3.3 Cue lathes * 3.4 Glass-working lathes * 3.5 Metal spinning lathes * 3.6 Ornamental turning lathes * 3.7 Reducing lathe * 3.8 Rotary lathes * 3.9 Watchmaker's lathes * 4 Gallery * 4.1 Examples of lathes* 4.2 Examples of work produced from a lathe * 5 See also * 6 References * 7 Further reading * 8 External links |
[edit] History
The lathe is an ancient tool, dating at least to ancient Egypt and known and used in Assyria and ancient Greece.
The origin of turning dates to around 1300 BC when the Ancient Egyptians first developed a two-person lathe. One person would turn the wood workpiece with a rope while the other used a sharp tool to cut shapes in the wood. Ancient Rome improved the Egyptian design with the addition of a turning bow. In the Middle Ages a pedal replaced hand-operated turning, freeing both the craftsman's hands to hold the woodturning tools. The pedal was usually connected to a pole, often a straight-grained sapling. The system today is called the "springpole" lathe. Spring pole lathes were in common use into the early 20th century.
During the Industrial Revolution, mechanized power generated by water wheels or steam engines was transmitted to the lathe via line shafting, allowing faster and easier work. Metalworking lathes evolved into heavier machines with thicker, more rigid parts. Between the late 19th and mid-20th centuries, individualelectric motors at each lathe replaced line shafting as the power source. Beginning in the 1950s, servomechanism were applied to the control of lathes and other machine tools via numerical control, which often was coupled with computers to yield computerized numerical control. Today manually controlled and CNC lathes coexist in the manufacturing industries.
[edit] Description
[edit] Parts

Parts of...