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A Bobcat compact excavator. A compact or mini excavator is a tracked or wheeled vehicle with an approximate operating weight from 0.7 to 8.5 tonnes. [1] It generally includes a standard backfill blade and features independent boom swing.
After WWI, demand for excavators increased and in 1924 they reached an agreement to build Marion draglines from 1 to 8 cubic yards capacity. In 1927, they built Type-7 1-yard and Type-460 1.5-yard models. The deal to build Marion machines ended in 1936. R&R began building their own designs with the Type-4120 followed by the 4140 of 3.5 cubic yards.
A stone picker (or rock picker) is an implement to sieve through the top layer of soil to separate and collect rocks and soil debris from good topsoil. It is usually tractor-pulled. [1] A stone picker is similar in function to a rock windrower (rock rake); a stone picker generally digs to greater depths to remove stones and rocks.
Crawler excavators come in a wide range of sizes, from compact excavators weighing just a few tons up to massive mining-class machines weighing hundreds of tons. The size and power of the excavator is typically selected based on the specific application and job requirements. Some key size and configuration options for crawler excavators include ...
For example, Caterpillar's smallest mini-excavator weighs 2,060 pounds (930 kg) and has 13 hp; [8] their largest model is the largest excavator available (developed and produced by the Orenstein & Koppel, Germany, until the takeover 2011 by Caterpillar, named »RH400«), the CAT 6090, which weighs in excess of 2,160,510 pounds (979,990 kg), has ...
Richard Smalley is credited with being the inventor of the world’s first mini excavator in 1959, although now superseded by tracked derivations of the compact excavator at the concept was highly successful in allowing a compact and cost effective machine, with these 'walking' or 'tow-behind' excavators having been sold into more than forty ...
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