In the High Middle Ages, harbour cranes were introduced to load and unload ships and assist with their construction-some were built into stone towers for extra strength and stability. Larger cranes were later developed in the Roman Empire, employing the use of human treadwheels, permitting the lifting of heavier weights. Construction cranes later appeared in ancient Greece, where they were powered by men or animals (such as donkeys), and used for the construction of buildings. The first known crane machine was the shadouf, a water-lifting device that was invented in ancient Mesopotamia (modern Iraq) and then appeared in ancient Egyptian technology. Cranes are commonly employed in transportation for the loading and unloading of freight, in construction for the movement of materials, and in manufacturing for the assembling of heavy equipment.
The device uses one or more simple machines to create mechanical advantage and thus move loads beyond the normal capability of a human.
It is mainly used for lifting heavy things and transporting them to other places. Depending upon your old axle, this would be why we previously mentioned you may need a different Leaf Spring U-Bolt Kit.Manual crane from the late 19th century used for unloading small loads (bales, crates, etc.) from ships at the Port of Barcelona, Spain.Ī crane is a type of machine, generally equipped with a hoist rope, wire ropes or chains, and sheaves, that can be used both to lift and lower materials and to move them horizontally. These axles can be 1 3/4" Round, 1 1/2" Square, or 2" Square. A common capacity that is converted over to the 2,200 lb 2 inch Square axle is the 1,400 lb Axle, which would use the 1" inner diameter wheel bearings. As long as you find the correct length that works for both your Leaf Spring Center and Hub Face, these 2,200 lb Axles will work, all that is additionally needed would be Hubs that will include the 1 1/16" Inner diameter wheel bearings, and possibly a larger U Bolt kit to re-mount your axle back to your leaf springs. It might be possible that your current trailer axle is using 1" Inner diameter wheel bearings, and you are looking to replace the axle. If you are feeling overwhelmed about which axle length to select, check out our How To Measure and Axle Video, which will walk you through the process. These axles are common with both 4 Lug and 5 Lug wheels, typically using tire sizes ranging from 8" to 13".
All of our 2,200 lb Axles feature 1 1/16" Straight Spindles. Axles with a 2,200 lb Capacity have Straight Spindles, meaning the same size inner and outer bearing. The most definitive way to determine axle capacity is to check your trailer bearings. If you are at all questioning the capacity of your axle, we would be happy to assist you.
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