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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.
The buckets were attached in sequence onto an endless moving chain that carried them down a ladder type mechanism to chew out chunks of soil, then upward to dump the spoil in neat piles on the ground as they began the downward descent to bring up more dirt. A 6-inch wide trench with a digging depth of 30 inches was the goal. [4] The first ...
A chain trencher cuts with a digging chain or belt that is driven around a rounded metal frame, or boom which 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.
Caterpillar Inc. does not manufacture a military version of the D9 per se, but the attributes that make the D9 popular for major construction projects make it desirable for military applications, as well, and with Israeli modifications and armor, it has been particularly effective for the Israel Defense Forces [3] and also used by KBR [citation needed] in Iraq.
The arm provides the up-and-down and closer-and-further (or digging movement) movements. Arms typically consist of a boom, stick and bucket with three joints between them and the house. The principle of a hydraulic excavator. The boom attaches to the house and provides the up-and-down movement. It can be one of several different configurations:
A Cat 420F In Arlington Massachusetts USA. A backhoe [a] is a type of excavating equipment, or excavator, consisting of a digging bucket on the end of a two-part articulated arm. It is typically mounted on the back of a tractor or front loader, the latter forming a "backhoe loader" (a US term, but known as a "JCB" in Ireland and the UK). [1]