The roller shaft is made of high-precision cold-drawn steel, and the tubing is selected for its uniform wall thickness, high roundness, straightness, and precision from high-frequency welded pipes. These features effectively reduce radial runout, ensuring smooth and even rotation during operation. The bearings are sourced from reputable manufacturers such as Harbin Bearing Group Corporation, Wafangdian Bearing Co., Ltd., and Luoyang Bearing Group Co., Ltd. The bearing housings and dust covers are stamped from high-quality steel plates. Lubrication is provided by a one-time high-efficiency long-life lithium-based grease. A labyrinth seal structure is used to ensure excellent water and dust resistance.