
[Middle English sawe, from Old English sagu.]
sawer saw'er n.
[Middle English sawe, from Old English sagu, speech.]

For more information on saw, visit Britannica.com.
Background
A saw is a hand tool with a toothed blade used to cut hard materials such as wood or bone. They are among the oldest known tools. Innovations made over thousands of years are still present in modern, mass-produced examples.
The first flint saws appeared during the early Paleolithic Era, between 60,000 and 10,000 B.C. Stone saws and composite saws made of stone bladelets or "microliths" set into a bone handle also were made during this time. The first metal blades were made possible by the discovery of copper about 4,000 years ago.
As the Iron Age began, the weaker copper and bronze were discarded and raked teeth were finally made possible. Eventually it became apparent that increasing the number of teeth in a saw increased the efficiency of its use. Small saws were used for carpentry, with the Asian style of pull-saws being specifically used by the Ancient Egyptians. Hieroglyphics discovered in Egyptian monuments record the Egyptians' use of the saw in their methods of furniture making. Adjustments in saw design were made according to a saw's intended application. For example, spaced teeth allowed the saw to double as a rake after the cutting stroke, removing sawdust from the developing "kern" or cut.
Saws continued to be improved as innovations in metallurgy were developed. Leonardo da Vinci invented a marble saw during the fifteenth century, and many developers in Europe and abroad took advantage of improvements in steel to create a better cutting edge. Throughout the seventeenth century, the strongest blades were still the narrowest. The bow saw—named for its structural similarity to the bow and arrow—continued to be popular because of this limitation. The popularity of the wooden frame saw among the early European settlers in America has been attributed to the scarcity of metal in the colonies at that time, as well as to the lack of wide-rolled steel.
With the advent of the Industrial Revolution, stronger, more durable saws were produced. For example, various forms of the circular saw were being made during the early eighteenth century, though the first patent in the United States was granted to Benjamin Cummins of New York in 1814. Today, a wide variety of manual and power saws are produced for consumer as well as commercial use.
Raw Materials
Tempered, high-grade tool steel, alloyed with certain other metals, is the main material used to manufacture the saw blade. Handles used to be made solely of wood, but modern tools can also be made with molded plastic.
Design
There are three major types of hand-held saws: the hacksaw, the bucksaw, and the iconically familiar crosscut or ripsaw.
The crosscut saw cuts across the grain, while the ripsaw cuts along the grain. The teeth of a saw are formulated differently to fulfill different needs. If the angle is too extreme, the teeth will catch on the wood. If the angle is too shallow, the teeth will be unable to cut at all. The teeth of a crosscut saw are angled more obtusely than those of a ripsaw, to slice into the wood grain without chiseling it. Conversely, the cutting edge of the ripsaw is set at right angles to the actual blade, so the teeth act like little chisels. A hardwood saw's teeth are optimally angled at 60 degrees, while softer woods must be cut with teeth set at a more acute angle, generally 45 degrees. Seasoned and green woods also call for differently shaped blades. A coarse saw has about five teeth per inch (two per cm), which is best when cutting green or soft wood. A fine saw, with at least eight teeth per inch (two per cm), can make smooth cuts in seasoned hardwood intended for show, or for more intricate constructions like dove-tailing.
The Manufacturing
Process
Quality Control
The American National Standard is intended to regulate the set of blades for safety as well as optimal use, since a badly made saw can be a hazard. Hacksaw blades with 24-32 teeth per inch (10-13 teeth per cm) must be set wavy. Other types of saws require a "raker set" in which every third tooth is left unset. The composite of the metal used is also regulated. A standard steel blade, in order to be called that, cannot be more than 1.25% alloy. For industrial and high-power saws, a high-speed steel blade must be able to withstand a temperature up to 1,000°F (537.78°C).
The Future
Thanks to such user-friendly optimization software as computer aided design (CAD), refinements are being experimented with that may retard the effects of repetitive motion on the handsaw user. "Cumulative Trauma Disorders," as they are known in the field, must be counteracted by ergonomic research. Goals include spreading the impact of using a saw over a larger area, reducing the need for sharp corrective movements, and improving the fit of the handle to avoid uncomfortable hand and arm positions. Volunteer test groups are used to gauge consumer needs and professional users test prototypes of products under development.
The same approach is being made towards improving both large and small scale power tools. Computer-aided manufacturing (CAM), computer-integrated manufacturing (CIM), and numerical control (NC) techniques allow saw manufacturers to cut waste and improve efficiency. Circle saws in the lumber industry have been reinvented with the help of finite element analysis. The Saw Paw Corporation of Pennsylvania holds patents on a recyclable, one-piece carbide saw shank and bit. The streamlined design is geared towards improving efficiency, while lengthening life expectancy, in order to lower the long-term cost of use.
Where to Learn More
Books
Armentrout, Patricia and David. The Saw. Rourke Publishers Group, 1995.
Disston, Henry. The Saw In History. H. Disston & Sons, Inc., 1922.
Goodman, W. L. The History of Woodworking Tools. G. Bell and Sons, Ltd., 1964.
Saws. Miller Freeman Publishers, 1990.
Periodicals
Christianson, Rich. "Computer Advances Drive Panel Saws Forward." Wood & Wood Products, October 1996, pp. 83-90.
[Article by: Jennifer Swift Kramer]
A cutting tool having a thin, flat metal blade, band, or stiff plate with cutting teeth along the edge; worked either by a reciprocating motion (as in a handsaw) or by a continuous motion (as in a band saw).
n.
A trite popular saying, or proverb. (Figurative and colloquial.) So called because it makes its way into a wooden head. Following are examples of old saws fitted with new teeth.
A penny saved is a penny to squander.
A man is known by the company that he organizes.
A bad workman quarrels with the man who calls him that.
A bird in the hand is worth what it will bring.
Better late than before anybody has invited you.
Example is better than following it.
Half a loaf is better than a whole one if there is much else.
Think twice before you speak to a friend in need.
What is worth doing is worth the trouble of asking somebody to
do it.
Least said is soonest disavowed.
He laughs best who laughs least.
Speak of the Devil and he will hear about it.
Of two evils choose to be the least.
Strike while your employer has a big contract.
Where there's a will there's a won't.
My dad let me use the saw to cut the wood for the doghouse.
LearnThatWord.com is a free vocabulary and spelling program where you only pay for results!
| savvy, sav, sausage balloon | |
| sawbones, sawbuck, sawn |
Multi-toothed cutting instrument.
A cutting blade with a toothed edge used to cut material too hard to slice with a knife.

A crosscut hand saw about 620 mm (24 inches) long |
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| Classification | Cutting |
|---|---|
| Types | Hand saw Back saw Bow saw Circular saw Reciprocating saw Bandsaw |
| Related | Milling cutter |
A saw is a tool that uses a hard blade, wire, or chain with a toothed edge to cut through softer materials. A saw may be worked by hand, or powered by steam, water, electricity or other power. An abrasive saw uses a powered circular blade for cutting metal.
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Contents
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In a modern serrated saw, each tooth is bent to a precise angle called its set. The set of the teeth is determined by the kind of cut the saw is intended to make. For example, a rip saw has a tooth set that is similar to the angle used on a chisel. The idea is to have the teeth rip or tear the material apart. Some teeth are usually splayed slightly to each side of the blade so that the cut width (kerf) is wider than the blade itself and the blade does not bind in the cut. The kerf of the blade is adjusted with a tool called a saw tooth setter.
An abrasive saw uses an abrasive disc or band for cutting, rather than a serrated blade.
In ancient Egypt, saws made of copper are documented as early as the Early Dynastic Period, circa 3,000–2,800.[1][page needed] Examples of saws and models of saws have been found in many contexts throughout Egyptian history. Particularly useful are tomb wall illustrations of carpenters at work that show sizes and the use of different types. Egyptian saws were set with the teeth projecting only on one side, rather than in the modern fashion with the more advantageous alternating set.
According to Chinese tradition, the saw was invented by Lu Ban.[2] In Greek mythology, as recounted by Ovid,[3] Talos, the nephew of Daedalus, invented the saw. In archeological reality, saws date back to prehistory and most probably evolved from Neolithic stone or bone tools. "[T]he identities of the ax, adz, chisel, and saw were clearly established more than 4,000 years ago."[4]
Until at least the mid-19th century, saws were made laboriously by hand. The teeth were filed out individually, then "set" by striking alternate teeth with a hammer against a "stake" or small anvil. Due to risk of breaking teeth, beginners were given saw set pliers which set even more slowly.[5]
In early English North America, the pit saw was one of the principal industrial tools. It was a two-man saw, generally operated over a pit across which the logs to be cut into boards were mounted. The saw was "a strong steel cutting-plate, of great breadth, with large teeth, highly polished and thoroughly wrought, some eight or ten feet in length"[6] with a handle on either end. The pit saw took at least two men to operate. The "pitman" stood in the pit— to raise the saw for the backstroke—and the "sawyer", standing above, guided the cut. Pit-saw workers were among the best paid in early colonial North America.
The pit saw is also known as a whipsaw.[7]
Hand saws use the blade thickness to remain stiff. The pull stroke also reduces the amount of stiffness required. Some examples are:
The second category of hand saws utilize a thinner blade by reinforcing it with a steel or brass back. Back saws are differentiated by the length of the blade. Some examples are:
Blade teeth are of two general types: Tool steel or carbide. Carbide is harder and holds a sharp edge much longer.
There are several materials used in saws, with each of its own specifications.
Plainsawing: Lumber for structural uses is typically plainsawn (also called flatsawn), a method of dividing the log that produces the maximum yield of useful pieces and therefore the greatest economy.
Quarter sawing: This sawing method produce edge-grain or vertical gain lumber, in which annual growth rings run more consistently perpendicular to the pieces' wider faces.
| Look up saw in Wiktionary, the free dictionary. |
| Wikimedia Commons has media related to: Saws |
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This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)
Dansk (Danish)
1.
n. - sav
v. tr. - save, save brænde
v. intr. - fægte med armene
2.
n. - mundheld, sentens
Nederlands (Dutch)
zagen, zaag, gezegde, cliché
Français (French)
1.
n. - scie
v. tr. - scier
v. intr. - scier
idioms:
2.
n. - adage
Deutsch (German)
1.
n. - Säge
v. - sägen, sah
idioms:
2.
n. - Sprichwort
Ελληνική (Greek)
n. - πριόνι, απόφθεγμα
v. - πριονίζω, κόβω με πριόνι, (μτφ.) κουτσουρεύω
Italiano (Italian)
segare, detto, sega
Português (Portuguese)
n. - serra (f), ditado (m)
v. - serrar
Русский (Russian)
пила, полотно пилы, изречение, афоризм, пословица, распиливать, пиликать
Español (Spanish)
1.
n. - sierra, serrucho
v. tr. - serrar, aserrar
v. intr. - serrar, aserrar, cortar, serrarse, aserrarse, tocar el violín
idioms:
2.
n. - dicho, refrán, proverbio, máxima
Svenska (Swedish)
n. - såg, ordstäv, talesätt, visdomsord
v. - såga, vifta med armarna
中文(简体)(Chinese (Simplified))
1. 锯子, 锯齿状部, 锯条, 锯, 锯成, 锯开, 拉锯般来回移动, 用锯, 拉锯
2. 格言, 谚语
中文(繁體)(Chinese (Traditional))
1.
n. - 鋸子, 鋸齒狀部, 鋸條
v. tr. - 鋸, 鋸成, 鋸開, 拉鋸般來回移動
v. intr. - 用鋸, 拉鋸, 鋸開
2.
n. - 格言, 諺語
한국어 (Korean)
1.
n. - 톱, 톱니 모양의 부분
v. tr. - 톱으로 켜다, (책의 등 부분에) 칼자국을 내다
v. intr. - 톱질하다, 톱으로 켜지다, 현악기를 연주하다
2.
n. - 속담, 격언, 10 달러
日本語 (Japanese)
n. - のこ, 鋸, 鋸歯状部, ことわざ, 格言
v. - 動かす, のこでひく, 木をひく, のこでひける, のこぎりでひく
العربيه (Arabic)
(الاسم) منشار (فعل) ينشر ألخشب
עברית (Hebrew)
n. - מסור, משור
v. tr. - ניסר
v. intr. - הניע כמסור
n. - פתגם, מימרה
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