The Struers Paper-4000 GRIT Polishing Cloth is a silicon carbide abrasive disc engineered for fine finishing and wet grinding in materialographic sample preparation. Supplied in 8-inch (200 mm) diameter format with 50 pieces per pack, this product delivers the ultra-fine abrasive action required for final-stage polishing of materials spanning Vickers hardness 30 to 400 HV. The 4000 grit designation (US #1200) removes fine scratches left by coarser abrasives and produces the high-quality surface finishes essential for microscopic examination and specialized analysis.

Technical Specifications

• Grit Size: 4000 (US #1200)
• Abrasive Material: Silicon Carbide (SiC)
• Diameter: 8 inches (200 mm)
• Quantity: 50 pieces per pack
• Backing Type: Plain back
• Hardness Range: HV 30 to 400
• Process Type: Wet grinding

– Key Features

• Silicon carbide construction provides sharp cutting edges and sustained hardness for consistent fine polishing performance.
• Ultra-fine 4000 grit eliminates scratches from preliminary grinding stages and prepares surfaces for final analysis.
• Wet grinding compatibility allows water-based cooling, lubrication, and swarf removal, reducing clogging and extending cloth life.
• Plain back design requires mounting to a compatible backing plate via mechanical fastening or adhesive application.
• Circular format matches standard 8-inch polishing heads and machines.

– Typical Applications

Final-stage polishing of metallographic samples across ferrous and non-ferrous alloys, composites, and engineering materials. Used with appropriate polishing solutions and lubricants to achieve defect-free surfaces required for microscopy, surface analysis, and quality control workflows.

– Compatibility & Integration

• Compatible with 8-inch (200 mm) diameter polishing machines and rotating heads.
• Integrates with liquid and paste abrasive delivery systems.
• Requires backing disc for secure mounting during wet grinding operations.