thomas. Excavator. May 29th , 2018.
Before the 1990s all excavators had a long or conventional counterweight that hung off the rear of the machine to provide more digging force and lifting capacity. This became a nuisance when working in confined areas. In 1993 Yanmar launched the worlds first Zero Tail Swing excavator9 which allows the counterweight to stay inside the width of the tracks as it slews thus being safer and more user friendly when used in a confined space. This type of machine is now widely used throughout the world.
Attached to the end of the boom is the stick (or dipper arm). The stick provides the digging force needed to pull the bucket through the ground. The stick length is optional depending whether reach (longer stick) or break-out power (shorter stick) is required.
Excavators are also called diggers JCBs4 (a proprietary name in an example of a generic trademark) mechanical shovels or 360-degree excavators (sometimes abbreviated simply to "360"). Tracked excavators are sometimes called "trackhoes" by analogy to the backhoe.5 In the UK wheeled excavators are sometimes known as "rubber ducks.
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