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Vermeer invents the first machine to dig, transport and replace large trees in the 1960s. The first larger round hay baler was invented by Gary Vermeer in 1971. Allis Chalmers first introduced the small round rotobaler in 1947. Vermeer begins building large trenchers to lay underground pipelines in the 1980s.
Note the 40-ton CAT wheeled dozer at lower left for size comparison. A bucket-wheel excavator (BWE) is a large heavy equipment machine used in surface mining. Their primary function is that of a continuous digging machine in large-scale open-pit mining operations, removing thousands of tons of overburden a day.
A chain trencher cuts with a digging chain or belt that is driven around a rounded metal frame, or boom. It resembles a giant chainsaw. This type of trencher can cut ground that is too hard to cut with a bucket-type excavator, and can also cut narrow and deep trenches. The angle of the boom can be adjusted to control the depth of the cut.
Ed Malzahn riding an early Ditch Witch trencher. The Ditch Witch RT120 Ride-On Trencher Ditch Witch JT60 Horizontal Directional Drill The Ditch Witch FX60 Vacuum Excavator. Ditch Witch, a trade name of Charles Machine Works, is an American brand of underground utility construction equipment, principally trenchers, which has been in operation ...
Roller chain and sprocket The sketch of roller chain, Leonardo da Vinci, Codex Atlanticus. Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles.
Modern tracks are built from modular chain links which together compose a closed chain. The links are jointed by a hinge, which allows the track to be flexible and wrap around a set of wheels to make an endless loop. The chain links are often broad, and can be made of manganese alloy steel for high strength, hardness, and abrasion resistance. [42]
In addition, Honda changed the carburetor from a 42 mm Keihin butterfly type to a 40 mm Keihin FCR. This increased the power from about 33 horsepower (25 kW) in the first generation to over 41 horsepower (31 kW) in the second. The first generation engine had a 10.5:1 compression ratio while the second generation had a 12:1 compression ratio.
Size Location Christ in the House of Martha and Mary [6] 1654–55 or c. 1654–56 [7] or c. 1655 [8] Oil on canvas, 160 × 142 cm National Gallery of Scotland, Edinburgh: Saint Praxedis [9] 1655 [3] Oil on canvas, 101.6 x 82.6 cm Kufu Company Inc., Tokyo On loan to the National Museum of Western Art, Tokyo Diana and Her Companions [10] 1655–56