Usually, the most effective way to grind cylindrical surface is to cooperate with machine tools by hand. Cylindrical surface mainly includes external cylindrical surface and workpiece clamped and driven by lathe or drilling machine. When grinding, the workpiece must be evenly coated with abrasive, then the grinding ring is installed and the gap is adjusted. Its tightness is mainly controlled in the best degree that the grinding ring can be rotated by hand. By rotating the grinding ring with the workpiece and pushing the grinding ring by hand, the grinding ring reciprocates along the axis of the workpiece. After grinding for a period of time, the workpiece needs to be turned around before grinding, which can eliminate the taper that may occur during grinding, make the workpiece get an accurate geometric shape, and the wear of the grinding ring will be more uniform. When grinding with a double-sided grinder, it should be selected according to the diameter of the workpiece, generally less than 80 mm, and the reciprocating speed of the grinding ring can be controlled according to the mesh of the workpiece during grinding. The grinding methods of inner cylindrical surface and outer cylindrical surface are basically the same. When grinding, the grinding rod should be clamped on the lathe or drilling machine first, and then the workpiece should be ground after being sleeved. In this process, the length of the workpiece should be appropriate, otherwise it will eventually affect the grinding accuracy of the workpiece. When grinding, the abrasive extruded from both ends of the workpiece should be removed in time, otherwise the orifice position of the workpiece will be ground into a trumpet shape. If the requirements for the orifice of the workpiece are too high, both ends of the grinding rod can be reduced with emery cloth, which can effectively prevent the orifice from becoming larger. Another feature of the double-sided grinder is that it is very suitable for grinding this kind of barrel, that is, it can grind two barrels at the same time, which not only saves time, but also increases the parallelism and smoothness of double-sided grinding, which is equivalent to killing two birds with one stone in one grinding process. It is also an efficient production method widely used in the market now.