Monday, November 16, 2009

Thursday, November 5, 2009

BULLDOZER: Facts & Figures Bulldozer

The bulldozer, so called because of its pushing power, is a track-wheeled, driver-operated heavy equipment machine fitted with a broad flat blade. Its main purposes are for pushing large, heavy objects or piles, and for flattening and grading. Properly speaking, a bulldozer whose blade has been replaced with a hydraulic scoop is a tracked loader, not a bulldozer.

The origin of the name "bulldozer" is uncertain, but it is interesting to note that in the 1880s a "bull-dose" was a large amount of medicine suitable for a bull, and a "bulldozer" was a large calibre pistol and the person who wielded it (ie., someone who intimidates others).

Bulldozers were developed by the Holt company (today known as Caterpillar) from tractors used to plough fields. The tires were replaced with a rotary track system, allowing these vehicles to move effectively over soft and muddy ground. A military application was also recognized, and the first armoured tanks with rotary tracks rolled across Europe toward the end of World War I. Today, bulldozers themselves may be armoured for construction in a military environment, as they are in Israel.

The blade of a bulldozer comes in three main varieties: the Straight blade, a short blade with no lateral curve or sidewings, used for fine grading; the Universal blade, a tall curved blade with sidewings used for gathering and moving more material; and a combination blade, called the "S-U" blade, which is less curved and has smaller sidewings, and is used for pushing boulders and rock piles. Bulldozers may also be fitted with either a single- or multi-shank ripper on the back, useful for breaking up hard surfaces either into rubble for removal or ploughable land.

While demolition companies or companies specializing in road construction may find it practical to purchase bulldozers for regular use, smaller companies or those with more diversified services may find it more practical to rent or lease their heavy equipment, depending on the project size. Prices for new bulldozers can range anywhere from $100,000 to $600,000, depending upon the manufacturer, size, and features of the machine. Rental costs may vary from $1800/$2500 per week/month to $2500/$7600 per week/month, or even more, again depending on size and features.

Source : heavyequipment.com

CRANE: Facts & Figures Crane

The crane is a construction devise comprised of an arm, a winch, and a wire rope to create mechanical advantage and lift heavy objects. The arm may be hydraulically controlled and connected to a pivot point, or may consist of a vertical mast and a horizontal boom. Many different types of cranes exist, each tailored for a specific purpose, but they all work on the same general principles, particularly leverage.

Cranes may be thought of as the oldest of heavy-equipment machines, having been invented by the Ancient Greeks for the building of temples. Those cranes, right up until the Industrial Revolution, utilized human or animal power to turn the winch or move the crane, though sometimes they could be connected to a water or wind mill. The first mechanically powered cranes utilized steam engines in the late 18th or early 19th Centuries. Modern cranes are powered by either electric or internal combustion engines, and use hydraulics to create even more lifting power.

There are many types of cranes. The one seen most obviously along the skyline is the tower crane, which has a fixed base and is constructed on site and dismantled once a project is complete. These cranes employ a counter balance on the short end of the boom, while the long end does the lifting. Because of their height and their slender base, they must be engineered to withstand forces that would cause them to tip, and are often braced by the very structure they are building. Truck mounted mobile cranes , known as boom trucks, generally employ a telescopic crane mechanism, allowing them to minimize their size for travel to and from job sites. Floating cranes are constructed upon pontoons, and are used mainly in the construction of bridges and ports, though they are sometimes also used to move awkward loads off of ships, and in salvage operations. Some floating cranes have lift capacities of 10,000 tonnes.

Large construction companies may have several cranes among their heavy equipment. For companies which are not regularly using cranes on their projects, many industrial equipment rental stores exist. Rental prices run at about $4000 per week or $11,000 per month for a 5-ton boom truck with a 110-foot reach, while a taller Potain self-erecting crane may run upwards of $8500 per month, though rentals of these are often for a minimum of three months.

Source : heavyequipment.com

Facts & Figures Motor Grader

A motor grader, sometimes called a blade or simply a "grader", is a heavy equipment engineering vehicle used to create a finish grade for roads, airstrips, or other large, flat surfaces such as soil foundation pads for building construction. They prepare and maintain gravel roads, which can degrade into a "washboard" after rains. In paving construction, they prepare the base course for asphalt. In colder climates they may be used for snow removal, while in grasslands they may be used for creating dirt tracks where the absence of trees means there is no need of a bulldozer. In some countries they may also be used to create shallow v-shaped ditches along roadways.

Typical models have three axles. The engine and cab rest over the section between the rear two axles, while the blade for grading is suspended from the section between the hinge in front of the middle wheels and the front wheels. Steering is accomplished by the movement of the front wheels on the turning of the hinge.

Early graders were known as "pull-type" graders, horse-drawn modified carriages with a small gasoline-powered motor to drive the conveyor. Invented in 1903 by two entrepreneurs, the Russell grader was eventually pulled by a tractor. In 1928, Caterpillar, whose engines were already being used on Russell graders, bought Russell Grader Manufacturing, and in the 1930s new grader lines were developed, the forerunners of today's modern motor graders.

Major manufacturers of motor graders now also include Case, Grove, Hitachi, Ingersoll-Rand, Komatsu, New Holland, Veekmas-Oy, and Volvo.

Blade sizes range from 2.5 to 7.3 meters, and engine sizes from 125 to 500 horsepower. Some companies may choose to lease or rent motor graders, depending on the size or duration of the project. Rental prices range from around $13,000 per month ($4,300 per week) for a smaller model such as the CAT 140H, to $24,500 per month ($8,200 per week) for a larger model such as the CAT 16H. As with other heavy equipment, the rental price can in most cases count as equity towards purchase, if the contractor decides there will be enough work to justify buying the machine outright.

Source : heavyequipment.com

How to Choose to Mobile Light Towers

Have you wondered How to Choose Mobile Light Towers? One of the first areas you should give careful Baldor Diesel Generatorsconsideration to is who the manufacturer of your mobile light tower will be. Our site, Mobile Light Towers, features two excellent mobile light tower producers, Baldor and Winco. Both Baldor and Winco have an extensive history in the power source industry and are pioneers as well as innovators. To learn more about both of these excellent companies, we've listed a brief synopsizes below.

* Baldor is an outstanding company with a 90 year history in the generator industry. Baldor's company mission is to be defined as the "best" as judged by their customers and they continue to meet that expectation year after year. Baldor delivers superior generators designed with their customers' needs in mind. Baldor is an efficient, clean power solution for virtually any application.
* Winco just celebrated it’s 80th anniversary and still continues to produce one of the largest and most diverse generator lines in the power source industry. When it comes to quality and dependability, Winco has consistently met and exceeded industry standards for over eight decades. Winco has a following of very loyal customers who continually look to them for top-of-the-line product offerings they can trust and rely on.

Source : mobilelighttowers.us

Wheel Loaders Buying Guide


Wheel loaders are a core component of many construction fleets. For digging, hauling, and scooping, they offer outstanding power and reliability. Here's what you need to know before purchasing a wheel loader.

What size do you need?
Wheel loaders come in a very large range of sizes. Most BuyerZone users choose either small loaders, around 50 to 80 horsepower (hp) with operating capacities of 2,000 to 5,000 lbs, or mid-sized wheel loaders that provide 100 to 300 hp and operating capacities up to 30,000 pounds or more.

The upper end of the wheel loader market consists of huge machines designed for use in mining or other large-scale hauling activities. These loaders can range from 500 to almost 1,500 hp and boast operating capacities measured in tons – 20 to 40 tons in a single scoop. In most cases, mid-sized loaders can get the job done.

Often, the physical size of the machine will limit you: if you need it to fit into a garage or through narrow passages, make sure you know what those size limits are before you choose a specific model.

What do you need it to do?
Full-sized wheel loaders can handle many different jobs thanks to a range of available attachments. The most common choice is a bucket: these can range from smaller, tougher rock buckets to huge buckets for scooping up light fill.

Wheel loaders can handle more than just buckets, though. They're popular in scrap yards, where they can lift large bundles of junk metal with grapples, and lumber yards, where they can handle massive logs with ease.

If you plan to regularly switch between attachments, a quick coupler makes switching more efficient. However, a coupler can also reduce overall capacity and breakout force, so it may not be worthwhile if you rarely change attachments.

Other considerations

* Older loaders use hand and foot levers to control the various functions – newer models feature much easier-to-use “pilot controls:” dual joysticks that provide full control with less stress on the operator.
* Cabs are becoming more like automobile interiors: they’re larger, provide better sight lines, and can include extras like suspension seats, climate control, and 12-volt outlets for cell phones or other accessories. These aren’t just frills: keeping the operator comfortable increases productivity.
* New wheel loaders are required to meet Tier-3 emissions standards set by the EPA. This makes them less polluting and can help reduce your average operating costs, as well.

Choosing a dealer
Buying a wheel loader is a significant investment – you can expect to pay anywhere from $50,000 to $150,000 for a new small to mid-sized loader. Due to this investment, you'll want to choose a dealer who will be around to support your purchase for years to come.

Look for dealers with significant experience in construction equipment. Find out how long they've been in business, how many manufacturers they work with, and if they offer a full range of accessories such as additional attachments, trailers, and replacement tires and parts.

Need to find dependable, experienced dealers in your area? Try our free request for wheel loader quotes service. Just fill out one simple form, and we'll connect you with qualified dealers in your area.
Source : buyerzone.com

Tuesday, November 3, 2009

Wheel Loader




Welder



Telehandler



Scissor Lift



Motor Grader




Lighting Tower




Lift Truck




Integrated Toolcarrier



Backhoe Loader




Boom Lift




Popular Posts

Loading...