Improved lint-cleaning cotton gin rollers feature protruding end shafts that may be removed and replaced without having to replace the entire roller, thereby saving considerable time and expense. A pair of hub components are configured for installation into respective open ends of an elongated cylindrical tube, and removeable and replaceable shaft components are configured for installation into the hub components. Each hub component may have a recess with a predetermined shape, and each shaft component has a peripheral shape that corresponds to the shape of each recess. The shafts that extend from the ends of hub components may terminate in a wrench-receiving geometry enabling manual rotation of the assembled roller. Each hub component may comprise at least one flange with an outer diameter that matches the inner diameter of the elongated cylindrical tube. The hub components may be configured to receive counterweights for operational balancing.

Improved lint-cleaning cotton gin rollers feature protruding end shafts that may be removed and replaced without having to replace the entire roller, thereby saving considerable time and expense. A pair of hub components are configured for installation into respective open ends of an elongated cylindrical tube, and removeable and replaceable shaft components are configured for installation into the hub components. Each hub component may have a recess with a predetermined shape, and each shaft component has a peripheral shape that corresponds to the shape of each recess. The shafts that extend from the ends of hub components may terminate in a wrench-receiving geometry enabling manual rotation of the assembled roller. Each hub component may comprise at least one flange with an outer diameter that matches the inner diameter of the elongated cylindrical tube. The hub components may be configured to receive counterweights for operational balancing.

Systems and methods for removing material, e.g., linters, from seeds, e.g., ginned cottonseeds, are provided. The systems and methods involve rotating the seeds in a rotatable drum having a plurality of longitudinal brushes. The centrifugal force created by the rotation of the drum and the plurality of longitudinal brushes urge the seeds against an interior surface of the drum that is lined with a brush insert. In this way, work is performed that removes the material from the exterior of the seeds. The material is removed using reduced pressure and the processed seeds are removed. The system may include a brush insert that is easily removed from the rotatable drum. Other systems and methods are disclosed.

The present disclosure discloses a method for producing raw cotton of machine-harvested long-staple cotton with a modal length of greater than or equal to 35 mm, including the steps: planting sea-island long-staple cotton and machining seed cotton, wherein planting the sea-island long-staple cotton includes preparation before machine harvesting, defoliation and ripening, choosing a cotton variety, etc.; and machining the seed cotton includes preparation before seed cotton ginning, mechanical separation of cotton seeds and raw cotton, and finishing the separated raw cotton. Raw cotton fibers obtained by the method of the present disclosure have main quality indexes that: a fiber length is 36.5-38.4 mm, a specific strength is 42.3-46.1 cN/tex, a uniformity is 86.2-87.0%, a foreign-fiber content is 0.2-0.4 g/t, and an impurity content is 2.6-3.4%. According to the method, not only can impurities and foreign fibers be effectively removed, but also mechanical damage to the raw cotton of the machine-harvested long-staple cotton with the modal length of greater than or equal to 35 mm is relatively small.

The present disclosure discloses a method for producing raw cotton of machine-harvested long-staple cotton with a modal length of greater than or equal to 35 mm, including the steps: planting sea-island long-staple cotton and machining seed cotton, wherein planting the sea-island long-staple cotton includes preparation before machine harvesting, defoliation and ripening, choosing a cotton variety, etc.; and machining the seed cotton includes preparation before seed cotton ginning, mechanical separation of cotton seeds and raw cotton, and finishing the separated raw cotton. Raw cotton fibers obtained by the method of the present disclosure have main quality indexes that: a fiber length is 36.5-38.4 mm, a specific strength is 42.3-46.1 cN/tex, a uniformity is 86.2-87.0%, a foreign-fiber content is 0.2-0.4 g/t, and an impurity content is 2.6-3.4%. According to the method, not only can impurities and foreign fibers be effectively removed, but also mechanical damage to the raw cotton of the machine-harvested long-staple cotton with the modal length of greater than or equal to 35 mm is relatively small.