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无动力滚筒由以下及部分组成:
The unpowered drum is composed of the following parts:
1、筒体 一般由圆管制作。常用的有钢管、塑料管，高精度和高强度的可以用圆钢制作;
1. The cylinder is generally made of round pipe. Commonly used steel pipe, plastic pipe, high-precision and high-strength can be made of round steel;
2、内轴 一般由圆钢制作。直径小的可以用冷拉圆钢，直径大的精度高的可以车制;
2. The inner shaft is generally made of round steel. The small diameter can be made of cold drawn round steel, and the large diameter and high precision can be turned;
3、端盖 一般由碳钢制作。直径小的载重量不大的可以采用冲制的方式加工，直径较大的或者载重量大的采用车制加工;
3. The end cover is generally made of carbon steel. Those with small diameter and small load can be processed by punching, while those with large diameter or large load can be processed by turning;
4、轴承 根据筒体和端盖选择合适的标准轴承即可。
4. Bearing according to the cylinder and end cover to choose the appropriate standard bearing.