The Bitzer HE piston can only obtain a good finish after polishing. Because the main function of polishing is to increase the surface finish and reduce the coefficient of friction. The polishing mainly refers to a processing method that uses mechanical, chemical or electrochemical effects to reduce the surface roughness to obtain a bright and smooth surface. So what aspects should be paid attention to when polishing Bitzer HE piston?

The Bitzer HE piston should pay attention to the following aspects when polishing:

　　 1. Wipe and clean the surface particles and contaminants attached to the surface of the Bitzer HE piston before polishing, and solve some serious oxidation, fine scratches and surface problems.

　　2. When polishing, you should adhere to the principle of "prefer slower rather than fast, lighter than heavy".

　　3. When starting polishing, the corners, corners and rounded corners of the Bitzer HE piston should be dealt with first.

　　4. The polishing step is to further level the paint surface after grinding, so the residual stripes of grinding should be removed first, and then the polishing agent can be used to make the gloss of the paint surface appear naturally.

　　5. Polishing must be carried out in a clean and dust-free room. Otherwise, the hard dust particles will contaminate the abrasive material and affect the surface of the Bitzer HE piston that is nearly completed.