Grader

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Grader

A grader, also commonly referred to as a road grader, a blade, a maintainer or a motor grader, is an engineering vehicle

Engineering vehicle

Engineering vehicles, known by the other terms: construction equipment, earth movers, heavy equipment or just plain equipment, are machines,vehicle machines, in the most basic form, are compound machines composed of simple machines....
with a large blade used to create a flat surface.

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Encyclopedia

A grader, also commonly referred to as a road grader, a blade, a maintainer or a motor grader, is an engineering vehicle

Engineering vehicle

Axle

An axle is a central shaft for a rotation wheel or gear. In some cases the axle may be fixed in position with a bearing or bushing sitting inside the hole in the wheel or gear to allow the wheel or gear to rotate around the axle....
s, with the engine

Engine

An engine is a mechanical device that produces some form of output from a given input.An engine whose purpose is to produce kinetic energy output from a fuel is called a Wiktionary:prime mover; alternatively, a motor is a device which produces kinetic energy from a preprocessed "fuel" ....
and cab

Cab

The word cab has a number of meanings, most of which are abbreviations. "Cab" means Porche in German:In transport:* Cabriolet , a horse-drawn carriage...
situated above the rear axles at one end of the vehicle and a third axle at the front end of the vehicle, with the blade

Blade

A blade is the flat part of a tool, weapon, or machine that normally has a cutting edge and/or pointed end typically made of a flaking stone, such as flint, or metal, most recently steel....
in between.

In civil engineering

Civil engineering

Civil engineering is a Professional Engineer discipline that deals with the design, construction and maintenance of the physical and naturally built environment, including works such as bridges, roads, canals, dams and buildings....
, the grader's purpose is to "finish grade" (refine, set precisely) the "rough grading" performed by heavy equipment or engineering vehicles such as scrapers

Wheel tractor-scraper

In civil engineering, a wheel tractor-scraper is a piece of heavy equipment used for Earthworks . The rear part has a vertically moveable hopper with a sharp horizontal front edge....
and bulldozer

Bulldozer

----A bulldozer is a Tractor crawler , equipped with a substantial metal plate , used to push large quantities of soil, sand, rubble, etc, during construction work....
s.

Graders can produce inclined surfaces and surfaces with cambered cross-sections for roads. In some countries they are used to produce drainage ditches with shallow V-shaped cross-sections on either side of highways.

Graders are commonly used in the construction and maintenance of dirt road

Dirt road

Dirt road is a common term for unpaved roads made from the native material of the land surface through which they pass, known to highway engineers as subgrade material....
s and gravel road

Gravel road

A gravel road is a type of Pavement road surfaced with gravel that has been brought to the site from a quarry or stream bed. They are common in less-developed nations, and also in the rural areas of developed nations such as Canada and the United States....
s. In the construction of paved roads they are used to prepare the base course

Base course

Base Course in pavements refers to the sub-layer material of an asphalt road and is placed directly on top of the undisturbed soil so as to provide a foundation to support the top layer of the pavement....
to create a wide flat surface for the asphalt

Asphalt

Asphalt is a sticky, black and highly viscosity liquid or semi-solid that is present in most crude petroleums and in some natural deposits sometimes termed asphaltum....
to be placed on. Graders are also used to set native soil

Soil

Soil is the naturally occurring, unconsolidated or loose covering on the Earth's surface. Soil is composed of particles of broken rock that have been altered by chemical and environmental processes including weathering and erosion....
foundation

Foundation (architecture)

A foundation is a structure that transfers loads to the earth. Foundations are generally broken into two categories: shallow foundations and deep foundations....
pads to finish grade prior to the construction of large buildings.

In some locales such as Northern Europe

Northern Europe

Northern Europe is the northern part or region of Europe. The United Nations defines Northern Europe as including the following countries and dependent regions:...
, Canada

Canada

Canada is a country occupying most of northern North America, extending from the Atlantic Ocean in the east to the Pacific Ocean in the west and northward into the Arctic Ocean....
and places in the United States

United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
, graders are often used in municipal and residential snow removal

Snow removal

Snow removal is the job of removing snow after a snowfall to make travel easier and safer. This is done by both individual households and by governments and institutions....
. In scrubland and grassland areas of Australia

Australia

Australia, officially the Commonwealth of Australia, is a country in the southern hemisphere comprising the Australia of the world's smallest continent, the major island of Tasmania, and numerous list of islands of Australia in the Indian Ocean and Pacific Oceans....
and Africa

Africa

Africa is the world's second-largest and second most-populous continent, after Asia. At about 30.2 million km? including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area....
, graders are often an essential piece of equipment on ranch

Ranch

A ranch is an area of landscape, including various structures, given primarily to the practice of ranching, the practice of raising grazing livestock such as cattle or sheep for meat or wool....
es, large farm

Farm

A farm is an area of land, including various structures, devoted primarily to the practice of producing and managing food , fibers and, increasingly, fuel....
s and plantation

Plantation

A plantation is usually a large farm or Estate , especially in a tropical or semitropical country, like Brazil or Nicaragua on which cotton, tobacco, lice coffee, sugar cane and the like are cultivated, usually by resident laborers....
s to make dirt tracks where the absence of rocks and trees means bulldozers are not required. A more recent innovation is the outfitting of graders with GPS technology, such as manufactured by Topcon Positioning Systems, Inc.

Topcon

Topcon Corporation is a Japan manufacturer of optical equipment for ophthalmology and surveying. Their headquarters are in Itabashi, Tokyo, Tokyo....
, Trimble Navigation, or [Mikrofyn www.mikrofyn.com] for precise grade control and (potentially) "stakeless" construction.

Capacities range from a blade width of 2.50 to 7.30 m and engines from 93–373 kW

kw or KW may refer to:* Kenworth* Kuwait* kW, kilowatt* Kw, the self-ionization of water* kw, the Cornish language * KW, Kitchener-Waterloo, Ontario, Canada...
(125–500 hp

Horsepower

Horsepower is the name of several non-International System of Units units of power . It was originally defined to allow the output of steam engines to be measured and compared with the power output of draft horses....
).

Education

The National Association of Heavy Equipment Training Schools

National Association of Heavy Equipment Training Schools

The National Association of Heavy Equipment Training Schools founded 2005, is an association of heavy equipment operator training schools in the United States....
(NAHETS), established 2002, uses grader training schools and curriculum as a method to test and train users in the ability of grader use.

Some grader-producing companies

John Deere
John Deere

John Deere was an American blacksmith and manufacturer who founded Deere & Company— the largest agricultural and construction equipment manufacturers in the world....
Caterpillar Inc.
Caterpillar Inc.

Caterpillar Inc. is a United States-based corporation headquartered in Peoria, Illinois. Caterpillar is, according to their corporate website, "the world's largest manufacturer of construction and mining equipment, diesel and natural gas engines, and industrial gas turbines."...
Case
Case Corporation

Case Corporation was a manufacturer of construction equipment and agricultural equipment. In 1999 it merged with New Holland to form CNH Global....
Grove
Grove

People, places, and things commonly known as grove include:* Grove , a small group of trees* Sacred grove, a small group of trees used as a place of pagan worship...
Komatsu
New Holland
New Holland

New Holland may refer to:...
Terex
Terex

Terex Corporation is a diversified global manufacturer of a broad range of heavy equipment for a variety of industries, including construction, infrastructure, quarrying, recycling, surface mining, shipping, transportation, refining, utility and maintenance....
Volvo Construction Equipment
Volvo Construction Equipment

Volvo Construction Equipment is a subsidiary and business area of Volvo. Volvo Construction Equipment develops, manufactures and markets equipment for the construction and related industries....
Mitsubishi Heavy Industries
Mitsubishi Heavy Industries

, or MHI, is a Japanese company. It is one of the core companies of Mitsubishi Group....
Galion
Galion Iron Works

Galion Iron Works is the name of the company that build Galion brand construction equipment. World famous for their graders that help shaped the roads of the world, a saying emerged that "All roads lead to Galion." They also manufactured rollers, cranes, asphalt millers and even riding sqeegees among other machines....

Grader

Education

Some grader-producing companies

See also