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The idler roller is one of the rollers in conveyor equipment and one of its key components. In the practical manufacturing process of cylindrical roller bearings using the unpowered roller method, manual drive conveyor systems have been replaced, allowing other driven conveyor belts to change the direction of the conveying operation. They call it a non-powered roller. A power-free roller conveyor is a conveying method in which production workers manually push the materials during the actual production process to achieve the purpose of transporting them. The power-free drum is not only reasonably equipped and features smooth rotation, but also has excellent load-bearing capabilities when transporting raw materials. In addition to its attractive design, it also features stain resistance, low noise levels, smooth production and transportation processes, as well as sufficient capacity to carry the raw materials being transported. Its features are a large capacity and a long service life. The connection and filtration in the middle of the unpowered drum are very simple. You can choose to manufacture several conveyor belts, and combine them with other conveying devices or specialized equipment to create a complex logistics transportation system, thereby meeting the requirements of various processes. A non-powered drum is composed of the following parts: 1. The cylinder of a non-powered drum is generally made of round steel tubes. Seamless steel pipes and plastic hoses are generally used. High-precision, high-toughness seamless steel pipes can be made from round steel. 2. The inner shaft of a non-powered roller is generally made of round steel. For small diameters, cold-drawn round steel can be used; for larger diameters, highly precise processing is possible ； 3. The end caps of non-powered roller bearings are generally made of carbon steel. Assuming the diameter is small and the load-bearing capacity is not high, it is possible to rely on stamping for processing, while the diameter or load-bearing capacity can be increased through milling. 4. Rolling bearings can be selected based on the engine block and bearing end caps. Powerless rollers have a high degree of reliability, and they are very convenient to use as well as easy to maintain throughout the production, manufacturing, and transportation processes. Therefore, idler rollers are widely used in light industry, mechanical equipment, electronics, food processing, the metallurgical industry, medical treatment, and other manufacturing fields.