Loaders are vastly utilized for civil engineering, construction and mineral projects for taking and carrying intended piles of materials (such as soil, gravel, sand and pieces of rocks and minerals) as well as excavation, loading and leveling grounds. They’re used alongside transport vehicles (trucks).
Loaders are available in rubber-wheeled and chain-wheeled models.
1. Rubber-wheeled Loaders:
Rubber-wheeled Loaders are more common than chain-wheeled ones which are used for most grounds except for swampy environment. For preventing damage and longer life span of Loader wheels against hard stones like silica which has sharp structure in mines, a chain cover protection is used for these wheels, causing increase height in wheels.
2. Chain-wheeled Loaders:
Considering special grounds such as swamps, certain options been designed and manufactured which uses two axle chains in these machines instead of rubber-wheels which not only doesn’t make it sink into the ground, but also it has much more maneuver power compared to rubber-wheeled ones considering embedded chain system in aforesaid ground type. Loaders can be divided into different groups according to their bucket size and the weight amount they’re able to carry. Rubber-wheeled buckets have capacity of six tenth cupid meters to twenty cupid meters and even more in accordance with customer’s need and SAE (Society of Automotive Engineers) standards. Chain-wheeled Loader’s bucket is designed and manufactured within range of six tenth to three and five tenth cupid meters. But the most commonly used and available model is rubber-wheeled Loaders with bucket size within range of seventy-six hundredth to four cupid meters. Loaders power are usually between 50 – 1250 horsepower.
3. Backhoe loader
This loader is the compilation of a rubber-wheeled loader and a crawler excavator. Just like loader, a bucket is embedded in its front and in rear, there’s an arm with 180-degree rotation ability for excavating holes and canals. This machine is smaller than loader and crawler excavator and its shape is similar to a tractor; back wheels bigger than front wheels and utilization in small projects. This machine is used for soil light cutting, small and medium canals cutting in accordance to shape 2-9-2, dredging, obstacles elimination, light cuttings and loading for trucks. Idea for this machine was a need for a machine capable of operating as loader and a crawler but at the same time reduced in size for small scaled projects which big machine operating is not possible in its area. This is why this machine is also called multi-purpose machine.
4. Mini loader (Bobcat)
In many road and building construction projects, presence of loaders in workshop area is not possible. There was also a need for machines with capabilities of a loader but in smaller scale, and this is where mini loaders come in; this machine due to its small frame, has more rotating and maneuver power. In mini loader design, many abilities for increasing machine’s performance was considered, which by adding these modifications (trencher, drill and hydraulic hammer) to the machine, its abilities are improved. One of the common traits of this machine, is the removal of steering wheel and replaced with using lever steer (Atari controller).
• Chain-wheeled loader
• Backhoe loader (Backhoe crawler)
• Mini loader (Bobcat)