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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.
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.
BWEs built since the 1990s, such as the Bagger 293, have reached sizes as large as 96 m (315 ft) tall, 225 m (738 ft) long, and as heavy as 14,200 t (31,300,000 lb). The bucket-wheel itself can be over 21 m (70 ft) in diameter with as many as 20 buckets, each of which can hold over 15 m 3 (20 cu yd) of material. BWEs have also advanced with ...
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]
At 2,500 pounds (1.1 t), the 9N could plow more than 12 acres (4.9 hectares) in a normal day pulling two 14-inch (360 mm) plows, [3] outperforming the tractive performance of the heavier and more expensive Farmall F-30 model. [3] The hitch's utility and simplicity have since made it an industry standard.
A quarter chain, or 25 links, measures 16 feet 6 inches (5.03 m) and thus measures a rod (or pole). Ten chains measure a furlong and 80 chains measure a statute mile. [1] Gunter's chain reconciled two seemingly incompatible systems: the traditional English land measurements, based on the number four, and decimals based on the number 10.