Conversely, fine grit produces a shallow, satin finish that is ideal for cosmetic applications where a smooth, non-reflective surface is required but heavy corrosion protection is not. Coarse Grit (10–30 Mesh): Reserved for heavy-duty operations such as stripping thick rust, mill scale, or old industrial coatings from steel beams and structural metal.
Understanding Grit Size Selection for Different Materials and Finishes
The choice between metallic, ceramic, or synthetic grit depends on the base material and the required finish. Medium Grit (40–60 Mesh): The workhorse for general industrial maintenance, offering a balance between removal speed and surface refinement for preparation before painting.
Fine Grit (80–120 Mesh): Used for final cleaning and light surface refinement, suitable for achieving a smooth finish on delicate substrates or preparing surfaces for high-gloss paints. Grit It is important to distinguish between sharp-edged blasting grit and spherical steel shot when consulting the chart.
Choosing Abrasive Media Grit Size Chart
Optimizing Blast Parameters True mastery of the blasting grit size chart involves understanding that size alone does not determine performance; it must be paired with the correct air pressure and nozzle distance. The grit size chart must be cross-referenced with the material compatibility chart to avoid using a grit that shatters prematurely or damages the substrate through excessive aggression.
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