8 in x 1/2 in Diamond Flat Lap Disc for Lapidary Grinding & Polishing

The 8" Diamond Flat Lap Disc is precision-engineered for professional gem cutters, lapidaries, and glass artists requiring exceptional flatness, durability, and aggressive grinding performance. Crafted with a heavy-duty balanced metal base plate and a precision-bonded electroplated diamond abrasive surface, this 8-inch flat lap ensures uniform material removal, minimal vibration, and true surface planes across all faceting, shaping, and pre-polishing operations.

Key Features

• Precision Diamond Coating: High-concentration industrial diamonds electroplated uniformly onto a flat metal plate for consistent cutting speed and extended service life.
• True Flat Surface: Engineered for tight dimensional tolerances to prevent crowning, rounded edges, or uneven facet junctions.
• Standard 1/2" Arbor: Compatible with standard 1/2" arbor shafts across popular 8" cabbing machines, flat lap grinders, and gemstone faceting units.
• Versatile Backing Options: Available in Plain (no backing), Pressure-Sensitive Adhesive (PSA), and Magnetic backing for quick grit changes on metal master laps.
• Wide Grit Range: Available from coarse 60 grit for rapid stock removal down to ultra-fine 3000 grit for pre-polish preparation.

Applications

• Gemstone Faceting & Cabochon Cutting: Ideal for roughing, pavilion and crown faceting, and pre-polishing sapphire, ruby, quartz, garnet, topaz, tourmaline, beryl, and agate.
• Glass & Crystal Cold Working: Beveling, edge grinding, and flattening glass slabs, optical components, and fused glass art.
• Ceramic & Mineral Polishing: Precision lapping and grinding of technical ceramics, geological core samples, and petrographic thin sections.

Technical Specifications

• Diameter: 8 inches (200 mm)
• Arbor Hole: 1/2 inch (12.7 mm)
• Abrasive Material: Premium Industrial Diamond
• Bond Type: Precision Electroplated Bond
• Available Grits: 60, 80, 100, 180, 260, 360, 600, 1200, 3000
• Backing Types: None / PSA Backing / Magnetic Backing / Master Lap Compatible

Operating Guidelines

• Always use an adequate continuous water drip or coolant supply during operation to prevent overheating, extend disc life, and ensure clean cuts.
• Operate at moderate speeds (800–1800 RPM) to maintain optimal grinding efficiency and control.
• Rinse thoroughly after each grit stage to prevent grit cross-contamination on workpieces and master laps.