Using a coarse grit at low pressure will result in inefficient cutting, while using fine grit at high pressure can over-clean and warp thin sheet metal. Selecting the correct blasting grit size is the foundational decision that dictates the outcome of any abrasive media process.
Blasting Grit Sequence Step Chart Guide
While grit (such as aluminum oxide or silicon carbide) has sharp edges that cut into the surface for aggressive cleaning, steel shot relies on deformation to create a peened, hardened surface. Understanding Grit Size Standards The blasting grit size chart operates on a numerical system that can appear counterintuitive to the uninitiated.
Impact on Surface Profile Surface profile is the texture or roughness left on a substrate after blasting, and it is directly dictated by the blasting grit size chart. Medium Grit (40–60 Mesh): The workhorse for general industrial maintenance, offering a balance between removal speed and surface refinement for preparation before painting.
Blasting Grit Sequence Step Chart Guide
Whether the goal is to strip old paint, prepare a substrate for coating, or create a uniform matte finish, understanding the precise correlation between grit number and physical dimension is critical for efficiency and quality control. 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.
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