mr.wicks Drilling, 2017-08-20 16:35:13. RAB drilling is used primarily for mineral exploration, water bore drilling and blast-hole drilling in mines, as well as for other applications such as engineering, etc. RAB produces lower quality samples because the cuttings are blown up the outside of the rods and can be contaminated from contact with other rocks.
mr.wicks excavator, 2017-12-18 12:08:19. Modern hydraulic excavators come in a wide variety of sizes. The smaller ones are called mini or compact excavators. For example, Caterpillarás smallest mini-excavator weighs 2,060 pounds (930 kg) and has 13 hp; their largest model is the largest excavator available (a record previously held by the Orenstein & Koppel RH400), the CAT 6090, which weighs in excess of 2,160,510 pounds (979,990 kg), has 4500 hp, and a bucket as large as 52.0 m³.
dakota excavator, 2017-12-19 16:33:53. 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 worldás first Zero Tail Swing excavator, 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.
mr.wicks excavator, 2017-12-18 11:32:40. 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.
mr.wicks excavator, 2017-12-18 11:53:00. The fundamental mechanism of an excavator consists of the undercarriage that includes the tracks, track frame, blade and the finalexcavator track (components) drive. The final drive has a hydraulic motor and gears that provide drive to the tracks. The operators cabin, engine, counterweights, hydraulic and fuel tanks are attached to the undercarriage, enabling the excavator to swing 360° without any hindrance.
mr.wicks excavator, 2017-12-18 12:10:40. The main function of the excavator engine is to drive the hydraulic pumps that provide oil at a high pressure to the slew motor, rams, track motors, and several accessories. Mostly, the boom can move only up and down, or in addition also shift towards the left and right of the machine. An arm is attached to the boom end that imparts the force for digging into the ground. A bucket is fixed at the arm end for carrying the soil. In addition, there are numerous other categories of attachments with the excavator that are used for boring, crushing, lifting, and ripping.
mr.wicks excavator, 2017-12-18 12:09:38. There are two main types of "Control" configuration generally use in excavators to control the boom and bucket, both of which spread the four main digging controls between two x-y joysticks. This allows a skilled operator to control all four functions simultaneously. The most popular configuration in the US is the SAE controls configuration while in other parts of the world, the ISO control configuration is more common. Some manufacturers such as Takeuchi have switches that allow the operator to select which control configuration to use.
mr.wicks excavator, 2017-12-18 12:08:27. An excavator is extremely useful for the construction industry, and can perform gigantic tasks that may not be possible by the human effort. Thus, the excavator has increased the speed of work to a great extent. Efforts are being made to reduce the excavator weight, and make it a quiet function.
mr.wicks excavator, 2017-12-18 11:53:08. Hydraulic excavators usually couple engine power to (commonly) three hydraulic pumps rather than to mechanical drivetrains. The two main pumps supply oil at high pressure (up to 5000 psi) for the arms, swing motor, track motors and accessories while the third is a lower pressure (~700 psi) pump for pilot control of the spool valves; this third circuit allows for reduced physical effort when operating the controls. Generally, the 3 pumps used in excavators consist of 2 variable displacement piston pumps and a gear pump. The arrangement of the pumps in the excavator unit changes with different manufacturers using different formats.
mr.wicks excavator, 2017-12-18 11:32:45. On the end of the stick is usually a bucket. A wide, large capacity (mud) bucket with a straight cutting edge is used for cleanup and levelling or where the material to be dug is soft, and teeth are not required. A general purpose (GP) bucket is generally smaller, stronger, and has hardened side cutters and teeth used to break through hard ground and rocks. Buckets have numerous shapes and sizes for various applications. There are also many other attachments which are available to be attached to the excavator for boring, ripping, crushing, cutting, lifting, etc.
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