There isn’t a definitive answer to whether sandblasting or shotblasting is better for surface abrasion, as various factors influence both processes.

Sandblasting:

• It’s a gentler operation with less aggressive surface abrasion.
• The pressure of particles and other impactful parameters in sandblasting is more controllable, leading to less risk of part destruction. However, there’s still a slight risk of accidental damage, especially when blasting sensitive surfaces with materials like sand or glass beads.

Shot Blasting:

• Typically used for more industrial tasks and high-volume parts production, as well as large flat surfaces like ship hulls and factory floors.
• Ideal for situations where parts have greater thickness and surface contaminants with higher adhesion.
• More suitable for high-efficiency surface abrasion of some steel and sensitive parts like gears and shafts, especially when time constraints are a factor.

Choosing between sandblasting and shot blasting depends on the specific requirements of the task at hand. If more delicate cleaning is needed or if the parts are particularly sensitive, sandblasting is often the preferred method. On the other hand, for more robust and industrial applications, especially where time efficiency is crucial, shot blasting is generally more suitable. Each method has its unique strengths and appropriate applications.