High-speed grinding lines in automotive body shops run at temperatures that soften paint and filler while generating fine abrasive dust. Inside the robotic finishing cells, a fan-shaped grinding wheel with a tapered end is mounted on a lightweight pneumatic or electric angle grinder. Its flared profile spreads the contact area across the panel surface, preventing deep gouges when the robot follows complex curves around door handles, wheel arches, or roof rails. The tapered tip reaches into tight radii where standard wheels would jam, allowing the same tool to deburr laser-welded seams and blend spot-weld nuggets without tool changes. Operators swap the wheel only when the grit wears smooth, typically after two or three body-side assemblies, keeping cycle times under 45 seconds per vehicle. On the final line, the same wheel removes overspray from door edges and tailgate flanges before the car enters the paint booth, ensuring a uniform surface that accepts primer without fisheyes. In adjacent sectors, the same wheel is occasionally fitted to handheld grinders for prototype trimming, where its fan shape prevents heat buildup on thin aluminum panels.