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McCulloch Motors Corporation is an American manufacturer of chainsaws and other outdoor power tools. The company was founded in Milwaukee , Wisconsin, in 1943 by Robert Paxton McCulloch as a manufacturer of small two-stroke gasoline engines and introduced its first chainsaw in 1948, the Model 5-49.
The saw chain, or cutting chain, is a key component of a chainsaw. It consists of steel links held together by rivets, and superficially resembles the bicycle-style roller chain, although it is closer in design to a leaf chain. Its key differences are sharp cutting teeth on the outside of the chain loop, and flat drive links on the inside, to ...
A macuahuitl ([maːˈkʷawit͡ɬ]) is a weapon, a wooden sword with several embedded obsidian blades. The name is derived from the Nahuatl language and means "hand-wood". [ 2 ] Its sides are embedded with prismatic blades traditionally made from obsidian , which is capable of producing an edge sharper than high quality steel razor blades.
The chain has to be properly matched to the guide bar and the saw. Chainsaw manufacturers specify a selection of suitable chains for each model of saw. Best safety requires that the chain is properly sharpened. One key sharpening parameter is the depth gauge setting. The depth gauge is the small steel protuberance in front of each cutting tooth.
The underside of each link features a small, metal finger called a "drive link", which locates the chain on the bar, helps to carry lubricating oil around the bar, and engages with the engine's drive sprocket inside the body of the saw. The engine drives the chain around the track by a centrifugal clutch, engaging the chain as engine speed ...
The McCulloch MAC-101, also called the MC-101 and MC101, is a two-stroke, single cylinder engine that was designed and produced by McCulloch Motors Corporation for kart racing use, being introduced in 1967. It was also used in the late 1970s and early 1980s as an ultralight aircraft engine. [1] [2] [3] [4]
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In the case of bicycle chains, it is possible to modify the overall gear ratio of the chain drive by varying the diameter (and therefore, the tooth count) of the sprockets on each side of the chain. This is the basis of derailleur gears. A multi-speed bicycle, by providing two or three different-sized driving sprockets and up to 12 (as of 2018 ...
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