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3C Electronics
The 3C industry covers consumer electronics such as smartphones, laptops, tablets, smartwatches, TWS earbuds and chargers. Structural parts are mainly aluminum alloy frames, stainless steel bezels, glass covers and engineering plastics.The exterior surface quality directly shapes product texture and user experience, and is the core link of appearance processing.
After CNC machining, aluminum frames carry tool marks, parting lines and edge burrs that must be removed through multiple grinding and polishing steps before anodizing or coating. Stainless steel bezels require uniform fine hairline texture or a mirror finish.
3C products are mass-produced with zero tolerance for cosmetic defects. Any scratch, uneven grinding mark or edge collapse leads to complete unit rejection, placing extremely high demands on abrasive grit, grinding pressure and tool conformability.
Lean Abrasives's high-precision sanding belts cover the full grit range from coarse tool-mark removal to fine satin finishing. Coarse belts rapidly eliminate CNC tool marks and parting lines, while fine belts produce uniform hairline texture, serving as the main consumables for continuous grinding lines on phone frames and laptop shells.
Our flap wheels and abrasive discs conform to complex 3D contours such as frame corners, button openings and port edges. The flexible tools follow curved surfaces without over-cutting or edge collapse.Polishing wheels are used for final mirror finishing on premium frames and stainless steel decorative parts. Non-woven polishing brushes and nylon roller brushes gently remove edge burrs and polishing residue without damaging the finished exterior surface.Sanding paper, sanding discs and scouring pads cover rework stations and manual touch-up needs.
