Search results
Results from the WOW.Com Content Network
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.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
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.
Marais or Groupe Marais, founded in 1962 in France, is a manufacturer of trenchers.The head office and workshop buildings have been located in Durtal since 2001. Marais society via its founder, Jacques Marais is in 1962 behind the trenching wheel and the mechanized laying of cables or flexible pipes process.
A 6-inch wide trench with a digging depth of 30 inches was the goal. [4] The first production trencher rolled off the assembly line in 1949. Called the "endless conveyor ditch digging machine," It was the first mechanized, compact service-line trencher developed for laying underground water lines between the street main and the house.
Example (inch, coarse): For size 7 ⁄ 16 (this is the diameter of the intended screw in fraction form)-14 (this is the number of threads per inch; 14 is considered coarse), 0.437 in × 0.85 = 0.371 in. Therefore, a size 7 ⁄ 16 screw (7 ⁄ 16 ≈ 0.437) with 14 threads per inch (coarse) needs a tap drill with a diameter of about 0.371 inches.
British Standard Fine (BSF) is a screw thread form, as a fine-pitch alternative to British Standard Whitworth (BSW) thread. It was used for steel bolts and nuts on and in much of Britain's machinery, including cars, prior to adoption of Unified, and later Metric, standards.