Water Dispenser Faucet,Hot Cold Water Dispenser Faucet,Kitchen Faucet With Water Dispenser,Hot And Cold Water Dispenser Faucet AIHUI Sanitary Ware , https://www.aihuisanitary.com 1. Grinding process As shown in Figure 1, the aluminum piston has a pin hole of φ45_(+0.004)~(+0.015)mm which can be ground with a cast iron rod. 1. Pay attention to the following problems during grinding: (1) The grinding rod is preferably made of the fine-tunable structure shown in Figure 2, so that the outer diameter of the grinding rod can be compensated in time, and the gap between the grinding and the workpiece can be controlled within an appropriate range. . It is generally 0.02 to 0.05 mm and is controlled by the operator's hand.