Bobcat skid steer

Bobcat skid steer DEFAULT

Skid-steer loader

Bobcat S650 skid steer loader

A skid loader, skid-steer loader or skidsteer is a small, rigid-frame, engine-powered machine with lift arms that can attach to a wide variety of labor-saving tools or attachments.

Skid-steer loaders are typically four-wheeled or tracked vehicles with the wheels mechanically locked in synchronization on each side, and where the left-side drive wheels can be driven independently of the right-side drive wheels. The wheels typically have no separate steering mechanism and hold a fixed straight alignment on the body of the machine. Turning is accomplished by differential steering, in which the left and right wheel pairs are operated at different speeds, and the machine turns by skidding or dragging its fixed-orientation wheels across the ground. The extremely rigid frame and strong wheel bearings prevent the torsional forces caused by this dragging motion from damaging the machine. As with tracked vehicles, the high ground friction produced by skid steers can rip up soft or fragile road surfaces. They can be converted to low ground friction by using specially designed wheels such as the Mecanum wheel. Skid-steer loaders are capable of zero-radius, "pirouette" turning, which makes them extremely maneuverable and valuable for applications that require a compact, agile loader. Skid-steer loaders are sometimes equipped with tracks instead of the wheels, and such a vehicle is known as a compact track loader. [1]

Unlike in a conventional front loader, the lift arms in these machines are alongside the driver with the pivot points behind the driver's shoulders. Because of the operator's proximity to moving booms, early skid loaders were not as safe as conventional front loaders, particularly due to the lack of a rollover protection structure. Modern skid loaders have cabs, open or fully enclosed and other features to protect the operator. Like other front loaders, they can push material from one location to another, carry material in the bucket, load material into a truck or trailer and perform a variety of digging and grading operations.


The first three-wheeled, front-end loader was invented by brothers Cyril and Louis Keller in Rothsay, Minnesota, in 1957. The Kellers built the loader to help a farmer, Eddie Velo, mechanize the process of cleaning turkey manure from his barn. The light and compact machine, with its rear caster wheel, was able to turn around within its own length while performing the same tasks as a conventional front-end loader, hence its name.

The Melroe brothers, of Melroe Manufacturing Company in Gwinner, North Dakota, purchased the rights to the Keller loader in 1958 and hired the Kellers to continue refining their invention. As a result of this partnership, the M-200 Melroe self-propelled loader was introduced at the end of 1958. It featured two independent front-drive wheels and a rear caster wheel, a 12.9 hp (9.6 kW) engine and a 750-pound (340 kg) lift capacity. Two years later they replaced the caster wheel with a rear axle and introduced the M-400, the first four-wheel, true skid-steer loader. The M-440 was powered by a 15.5 hp (11.6 kW) engine and had an 1,100-pound (500 kg) rated operating capacity. Skid-steer development continued into the mid-1960s with the M600 loader. Melroe adopted the well-known Bobcat trademark in 1962.


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The conventional bucket of many skid loaders can be replaced with a variety of specialized buckets or attachments, many powered by the loader's hydraulic system. The list of attachments available is virtually endless. Some examples include backhoe, hydraulic breaker, pallet forks, angle broom, sweeper, auger, mower, snow blower, stump grinder, tree spade, trencher, dumping hopper, pavement miller, ripper, tillers, grapple, tilt, roller, snow blade, wheel saw, cement mixer, and wood chipper machine.

Some models of skid steer now also have an automatic attachment changer mechanism. This allows a driver to change between a variety of terrain handling, shaping, and leveling tools without having to leave the machine, by using a hydraulic control mechanism to latch onto the attachments. Traditionally hydraulic supply lines to powered attachments may be routed so that the couplings are located near the cab, and the driver does not need to leave the machine to connect or disconnect those supply lines. Recently, manufacturers have also created automatic hydraulic connection systems that allow changing attachments without having to manually disconnect/connect hydraulic lines

Loader-arm design[edit]

Lift mechanism of a skid loader of the powered-triad type

The original skid-steer loader arms were designed using a hinge at the rear of the machine to pivot the loader arm up into the air in an arc that swings up over the top of the operator. This is known as a radial lift loader.[3] This design is simpler to manufacturer, offers better rear visibility, greater reach at truck bed height, and tends to be preferred for users who do a lot of digging. The downsides are it limits the usable height to how long the loader arm is and the height of that pivot point. In the raised position the front of the loader arm moves towards the rear of the machine, requiring the operator to move extremely close to or press up against the side of a tall container or other transport vehicle to get the bucket close enough to dump accurately. At the highest arm positions the bucket may overflow the rear of the bucket and spill directly onto the top of the machine's cab, although this was mitigated greatly by automatic bucket leveling designs. Radial arm is still the most common design and preferred by many users.

Vertical lift designs use multiple hinges and parallel lifting bars on the loader arm, with the main pivot points towards the center or front of the machine. This allows the loader arm to have greater operating height while retaining a compact design, and allows the vertical movement almost completely straight-up vertical, to keep the bucket forward of the operator's cab, allowing safe dumping into tall containers or vehicles. The downside being added complexity and cost, reduced rear visibility, and reduced reach at typical truck bed height. Vertical lift designs are growing rapidly in popularity and now make up a significant proportion of new skid loader sales.


A skid-steer loader can sometimes be used in place of a large excavator by digging a hole from the inside. The skid loader first digs a ramp leading to the edge of the desired excavation. It then uses the ramp to carry material out of the hole. The skid loader reshapes the ramp making it steeper and longer as the excavation deepens. This method is particularly useful for digging under a structure where overhead clearance does not allow for the boom of a large excavator, such as digging a basement under an existing house. Several companies make backhoe attachments for skid-steers. These are more effective for digging in a small area than the method above and can work in the same environments. Other applications may consist of transporting raw material around a job site, snow removal, or assisting in the rough grading process.


See also[edit]



External links[edit]


The Complete Guide to Skid Steer Loaders

One of the main situations in which you might want to avoid using a skid-steer loader is if landscape maintenance is a concern. If it is, you’ll want to use a compact track loader, as the tracks will not damage the landscape.

How wide are Bobcat skid-steer loaders?

Depending on the model, Bobcat skid-steer loaders can range from 3 to 6 feet wide. If you’re trying to decide on a model, determine what you think you will be using the loader for. Will you need to maneuver the unit in and out of gates, fences or other narrow openings? Once you know how you will be using the machine, discuss your needs with one of the knowledgeable sales and rental experts at any of ournine convenient locations.

How much do skid-steer loaders weigh?

Skid-steer loaders are available in a number of size classes as determined by Associated Equipment Manufacturers:

  • Zero to 1,251 lbs.

  • 1,251 to 1,350 lbs.
  • 1,351 to 1,600 lbs.
  • 1,601 to 1,750 lbs.
  • 1,751 to 2,200 lbs.
  • 2,201 to 2,700 lbs.
  • 2,701 lbs. and above

As the size class increases, so does the unit’s horsepower.

Are skid-steer loaders hard to maneuver?

Skid-steer loaders are quite easy to maneuver — in fact, this is one of their main selling points. The smaller size, for instance, is designed to easily move around inside and fit through narrow gates or fences. Most units offer a choice of standard or joystick controls allowing the operator to choose which version they prefer.

How tall is a skid-steer loader?

Depending on the model, the height of a skid-steer loader can starts around 6 feet and goes up to about 8 feet.

What size skid-steer loader do you need?

The size of the skid-steer loader you need is dependent on the job at hand. If you’re going to be doing work in an enclosed space like a backyard, you’ll want to stick with a smaller loader. If the job requires heavy lifting, you’ll want to go bigger. You will also want to determine if a radial or vertical lift machine would be more useful.

Be sure to speak to one of our team’s rental and sales experts, who can help guide you to the perfect skid-steer loader and the best attachments for the job.

Stop by any of our nine convenient Bobcat branches and talk with a sales expert today.

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Bobcat S450 Skid Steer Loader, 2365 kg

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