This invention belongs to the technical field of tobacco
processing equipment, and provides a modified nylon idler roller for a tobacco
processing belt conveyor and its manufacturing process. The idler roller includes a roller shaft, a three-section roller, a positioning sleeve, and a sealing end cap. The three-section roller is integrally formed from modified
nylon material, and has an axially extending sleeve groove inside, with friction texture on its outer circumference. The positioning sleeve is embedded in the sleeve groove, and its outer ring has a guide rail that cooperates with the sleeve groove. The three-section roller and the positioning sleeve are axially limited by a snap-fit structure. A
brass sleeve is fixed to the inner ring of the positioning sleeve, and the
brass sleeve has a bearing housing cavity that rotatably cooperates with the reduced
diameter shaft section. The outer wall of the
brass sleeve slides in contact with the inner wall of the sleeve groove. The sealing end cap is fixedly connected to the end of the three-section roller and together with the roller shaft and the positioning sleeve, forms a
closed chamber. This invention enables oil-free, low-resistance, and sealed rotation, and is suitable for the harsh working conditions of tobacco
processing workshops.