There are many kinds of sandblasting media for automatic sandblasting machines. The following are some common sandblasting media:

1. Metal abrasive: such as steel sand, steel balls, steel wire cut balls, etc., often used to remove rust, oxide and other pollutants on the metal surface to increase the roughness and adhesion of the metal surface.

2. Non-metallic abrades: including quartz sand, brown corundum, white corundum, glass sand, ceramic sand, etc., these abrades are usually used to remove dirt, coating and burr from non-metallic surfaces, and can also be used for surface engraving and frosting treatment.

3. Plastic abrasives: such as nylon sand, polyester sand, etc., with lower hardness and better elasticity, suitable for sandblasting of softer materials, such as plastic, rubber, etc.

4. Plant abrasives: such as walnut shell, corncob, etc., is a natural environmentally friendly abrasive, often used for sandblasting treatment with mild surface requirements, such as wood, stone and so on.

When selecting the sandblasting medium, it is necessary to consider factors such as the nature of the material to be treated, the purpose of sandblasting and the requirements for surface roughness. Different sandblasting media will produce different sandblasting effects, so it is necessary to choose according to the specific situation in practical application.