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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.
Gradually Universal Excavators designed by Bucyrus-Erie replaced Ruston & Hornsby designed models. The original range of standardised rope-operated machines included 10RB, 17RB, 19RB, and 33RB and were upgraded through some intermediate models including the 54RB to a main selling range in the 1960s of 22RB, 30RB, 38RB, 61RB, and 71RB.
The Caterpillar 345C L is a large hydraulic excavator manufactured by Caterpillar Inc. The 345C L, with 345 hp (257 kW) of net flywheel power, is classified as a large excavator by Caterpillar. In Caterpillar's naming conventions, the last two digits indicate the excavator's weight in metric tonnes. The 345C L is not named after its horsepower.
Page modernized its draglines further with the 700 series in 1954. Page's largest dragline was the Model 757 delivered to the Obed Mine near Hinton, Alberta in 1983. It featured a 75-yard bucket on a 298-foot boom and an operating weight of 4,500 tons. In 1988, Harnischfeger Corporation (P&H Mining Equipment) purchased Page Engineering Company.
They manufactured over 55,000 hydraulic excavators; more than 700 of those were rated at over 100 tons' service weight. O&K also manufactured the world's largest hydraulic excavator, [citation needed] at 900 tons' service weight with a shovel capacity of over 52 cubic metres (68 cu yd) and an engine output of 2,984 kilowatts (4,055 HP).
[7] [8] The bucket wheel excavator reaches 30 m digging height with a cutting depth of -10 meters. [ 5 ] Although construction of the Type SRs 2000 began in 1989 with one of the first batches being sent to Ekibastusz in then Kazakh SSR ( USSR ), [ 5 ] [ 2 ] it only began official global commissioning and serialization in 2008, [ 1 ] with the ...
1935: RD8 (132 hp [98 kW]) introduced. 1937: The "R" prefix dropped, D8 debuts. 1940s: D8 2U Series (148 hp [110 kW]) introduced; 1950: D8 new front-rounded grill that would last until D8K was replaced by D8L in 1982.
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 ...
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