Invented in England in 1780, the circular saw (also less-commonly known as the 'buzz saw' in the USA) is a metal disc or blade with saw teeth on the edge as well as the machine that causes the disk to spin. It is a tool for cutting wood or other materials and may be hand-held or table-mounted. Wikimedia Commons has media related to: England Travel guide to England from Wikitravel English language English law English (people) List of monarchs of England – Kings of England family tree List of English people Angeln (region in northern Germany, presumably the origin of the Angles for whom England is named) UK... 1780 was a leap year starting on Saturday (see link for calendar). ... Hot metal work from a blacksmith In chemistry, a metal (Greek: Metallon) is an element that readily forms ions (cations) and has metallic bonds, and metals are sometimes described as a lattice of positive ions (cations) in a cloud of electrons. ... In geometry, a disk is the region in a plane contained inside of a circle. ... A blade is the flat part of a bladed tool or weapon that (usually) has a cutting edge and/or pointed end typically made of a metal, such as steel used to cut, stab, slice, throw, thrust, or strike. ... Portable saw The article is about the cutting tool. ... Types of teeth Molars are used for grinding up foods Carnassials are used for slicing food. ... Wind turbines A machine is any mechanical or organic device that transmits or modifies energy to perform or assist in the performance of tasks. ... A modern hammer is directly descended from ancient hand tools A tool is a device that provides a mechanical or mental advantage in accomplishing a simple machine, or a combination of them. ... A tree trunk as found at the Veluwe, The Netherlands Wood derives from woody plants, notably trees but also shrubs. ... A human hand typically has four fingers and a thumb The hand (med. ... Furniture is the collective term for the movable objects which support the human body (seating furniture and beds), provide storage, and hold objects on horizontal surfaces above the ground. ...

While today they are almost exclusively powered by electricity, larger ones, such as those in "saw mills", were traditionally powered by water turning a large wheel. This article or section should be merged with Sawmill A saw mill is a machine used in forestry to cut trees into logs. ... Water (from the Old English word wæter; c. ... An overshot water wheel standing 42 feet high powers the Old Mill at Berry College in Rome, Georgia A water wheel (also waterwheel, Norse mill, Persian wheel or noria) is a hydropower system; a system for extracting power from a flow of water. ...

Most of these saws are designed to cut wood but may be equipped with blades designed to cut masonry, plastics or metal although there are purpose-made circular saws specially designed for particular materials. Masonry is the building of structures from individual units laid in and bound together by mortar. ... Plastic is a term that covers a range of synthetic or semisynthetic polymerization products. ... Hot metal work from a blacksmith In chemistry, a metal (Greek: Metallon) is an element that readily forms ions (cations) and has metallic bonds, and metals are sometimes described as a lattice of positive ions (cations) in a cloud of electrons. ...

In addition to hand-held circular saws, different saws that use circular saw blades include:

• Miter saws (or Chop saw or Cut-off saw)
• Radial arm saws
• Saw mills
• Table saws
• Panel saws
• Biscuit joiners

A miter saw (also called mitre saw) is a tool used to make accurate crosscuts and miters in a workpiece. ... A radial arm saw is a machine intended for cutting materials to length. ... This article or section should be merged with Sawmill A saw mill is a machine used in forestry to cut trees into logs. ... Powermatic® Model 1660791K 5 HP Cabinet Table Saw Bosch Model 4000-46 10 Bench Table Saw Laguna Tools TSS Sliding Tablesaw A table saw or sawbench is the most common piece of large woodworking equipment. ... Panel saw is a kind of woodworking machinery > panel line > panel dividing equipment that is intended to divide panel sheets into sized parts. ... A Biscuit joiner or sometimes plate joiner is a woodworking tool used to join two pieces of wood together. ...

Hand-held circular saws

Modern DeWalt "sidewinder" portable circular saw (Model DW369CSK)

The term circular saw is most commonly used to refer to a hand-held electric circular saw designed for cutting wood, which may be used less optimally for cutting other materials with the exchange of specific blades. Circular saws can be either left or right handed, depending on which side of the blade the motor sits. The article on electrical energy is located elsewhere. ...

The saw can be designed for the blade to mount directly to the motor's driveshaft (known coloquially as a sidewinder), or be driven indirectly by a perpendicularly-mounted motor via worm gears, garnering considerably higher torque (Worm-drive saws). A motor is a device that converts energy into mechanical power, and is often synonymous with engine. ... Cardan driveshaft with universal joints A driveshaft or driving shaft or Cardan shaft is a mechanical device for transferring power from the engine or motor to the point where useful work is applied. ... Worm and worm gear A worm gear, or worm wheel, is a type of gear that engages with a worm to greatly reduce rotational speed, or to allow higher torque to be transmitted. ... In physics, torque can be thought of informally as rotational force. Torque is measured in units of newton metres, and its symbol is Ï„. The concept of Torque, also called moment or couple, originated with the work of Archimedes on levers. ...

The worm-drive portable circular saw was invented in 1924 by the Michel Electric Handsaw Company which renamed itself Skilsaw Inc., today a subsidiary of Robert Bosch GmbH. Portable circular saws are often still called Skilsaws or Skil saws. Its successor is still sold by Skil as the model 77. To get around the Skil patents, Art Emmons of Porter-Cable invented the direct-drive sidewinder saw in 1928. Recently smaller cordless circular saws with rechargeable batteries have become popular. In business, a subsidiary is a company controlled by another, usually large—and often multinational—company or corporation. ... The Robert Bosch GmbH is a German company which was started in 1886 by Robert Bosch. ... Black & Decker (NYSE: BDK) is a corporation based in Towson, Maryland best known for power tools and home appliances. ... Rechargeable batteries are batteries that can be restored to full charge by the application of electrical energy. ...

Sawmill blades

Saw mills use very large circular saws, up to nine feet (3.6 meters) in diameter. They are either left or right handed, depending on which side of the blade the plank falls away from. Benching determines which hand the saw is. Saws of this size typically have a shear pin hole, off axis, that breaks if the saw is overloaded and allows the saw to spin free. The most common version is the ITCO (insert tooth cut-off) which has replaceable teeth. This article is about a foot as a unit of length. ... metre or meter, see meter (disambiguation) The metre is the basic unit of length in the International System of Units. ... Sawfiler benching a double cut saw A sawfiler is a person who maintains and repairs saws in a saw mill. ...

External links

• Skil circular saws
• History of the portable circular saw
• Porter-Cable history
• Skilsaw history

• Pacific/Hoe large circular saws
• Simonds large circular saws