Presentation of a Presentation of a chainsawchainsaw

HistoryHistory

• The origin is debated, but the first The origin is debated, but the first chainsaw was probably made around 1830 chainsaw was probably made around 1830 by the German orthopaedist Bernard Heine by the German orthopaedist Bernard Heine

• Two important contributors to the modern chainsaw are Joseph Buford Cox and Andreas Stihl; the latter patented and developed a chainsaw in 1926 and a gasoline-powered chainsaw in 1929, and founded a company to mass-produce them

ConstructionConstruction

• Engine is almost always a two-stroke gasoline internal combustion engine or electric motor

• Drive mechanism : typically a clutch and sprocket.

• Guide bar: an elongated alloy steel bar with Guide bar: an elongated alloy steel bar with a round end typically 16 to 36 inches in a round end typically 16 to 36 inches in length. An edge slot guides the cutting length. An edge slot guides the cutting chain.chain.

UsabilityUsability

• In most cases, chainsaws are used In most cases, chainsaws are used for woodcuttingfor woodcutting

• Special chainsaws are used to cut Special chainsaws are used to cut concrete, brick and natural stone. concrete, brick and natural stone. These use similar chains to ordinary These use similar chains to ordinary chainsaws, but with cutting edges chainsaws, but with cutting edges made using diamond. made using diamond.

• In films and computer In films and computer games, the chainsaw often games, the chainsaw often features as a weapon or an features as a weapon or an instrument of murder or instrument of murder or torture.torture.

internal combustion engine internal combustion engine and electric motor and electric motor

chainsawchainsaw

… …AND SOME PICTURES AND SOME PICTURES

Big Gus - world's largest Big Gus - world's largest running chainsawrunning chainsaw

• And lastly one video And lastly one video

• http://http://www.youtube.comwww.youtube.com/watch?v=E9x8rBKC4BE&NR=1/watch?v=E9x8rBKC4BE&NR=1

SourcesSources

• WikipediaWikipedia• Google imagesearchGoogle imagesearch• YoutubeYoutube