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Many people have heard of drive rollers; they are very useful conveying devices that enable efficient transfer while also ensuring the integrity of the transferred material. For people, the integrity of conveying equipment is very important, as damage may occur during transportation; therefore, to ensure that goods are delivered intact, it is essential to choose the right equipment. A power-free roller is a highly effective device that delivers optimal results during transportation. Such power-free rollers are now widely used; they can be employed in various industries as well as in different situations, which shows that their applications are quite extensive. Before using a power-free roller, we need to understand its structure so that we can use it more effectively. So, how is a power-free roller structured? Let’s take a look below. A non-powered drum is primarily composed of four components, all of which are essential. The first component is the drum body; as we know, the drum body is the most important part of a non-powered drum. It is made of steel pipes or plastic pipes, though other materials such as round steel and iron steel can also be used. These two types are not particularly common, but they are still very effective. The materials used for the inner shafts are generally of two types: one with a slightly larger diameter and the other with a slightly smaller diameter. When using a roller with a larger diameter, it can be used to transport larger objects such as vehicles; whereas using an inner shaft with a smaller diameter allows for the transportation of smaller items, which makes things more convenient and reduces the risk of errors. Carbon steel is mainly used for making the rear cover, and its production process is relatively complex, involving stamping and turning. These processes must be carried out in a proper environment; attempting to carry them out privately will not yield the best results. End covers manufactured in a proper environment are safer. The last type is bearings, which are also a very common material. They are selected based on the dimensions of the cylinder, and people can use this method as a guide when making their choices. These are the four components of a power-free roller. Overall, these four components are not very complex, but they are all necessary. Therefore, it is important to check them before use to ensure their proper functioning, so as to avoid any mistakes or errors during transportation.