8 in Diamond Dot Magnetic Backing Disc for High-Precision Lapidary Polishing

Overview

The 8 in Diamond Dot Magnetic Backing Disc is a high-precision electroplated diamond patterning disc engineered for 8-inch lapidary flat laps, rotary glass bevelers, and gemstone faceting equipment. Featuring a pattern of raised electroplated diamond dots bonded onto a rust-resistant spring steel core with a magnetic backing, this disc maximizes slurry evacuation, eliminates hydroplaning, and enables swift, tool-free disc changes during multi-stage lapidary and glass workflows.

Key Features

• Diamond Dot Matrix: Raised dot patterning creates continuous channels for instant swarf and water slurry evacuation, preventing disc loading, hydroplaning, and premature glazing.
• Magnetic Backing System: Effortlessly mounts to magnetic master laps without adhesives, screws, or clamping rings, enabling rapid grit transitions.
• Rust-Resistant Spring Steel Core: Flexible yet resilient spring steel base ensures flat, vibration-free contact across the entire 8-inch grinding surface.
• Multi-Stage Grit Progression (60 to 1200 Grit): Accommodates aggressive material hogging, precision shaping, intermediate smoothing, and high-precision pre-polishing.
• Wet Grinding Durability: Engineered for continuous water-cooled operation to prevent heat build-up, prolong diamond life, and eliminate airborne dust.

Applications

• Gemstone pre-forming, cabochon grinding, and facet pre-polishing
• Stained glass edge smoothing, cold glass beveling, and bottle neck leveling
• Flattening ceramic, porcelain, and pottery bottoms
• Fine smoothing of mineral specimens, agate slabs, quartz, and petrified wood

Technical Specifications

• Disc Diameter: 8 inches (200 mm)
• Abrasive Pattern: Electroplated Diamond Dots
• Backing: Magnetic Backing
• Core Material: Flexible Spring Steel Plate
• Available Grits: 60, 80, 180, 320, 600, 800, 1200 Grit
• Machine Compatibility: 8-inch flat lap machines (Hi-Tech, Covington, Inland, Lortone, and Hans flat laps)

Operating Guidelines

• Always operate with adequate water coolant to lubricate the grinding zone and flush away swarf through the dot channels.
• Apply light, steady, and uniform hand pressure; let the diamonds do the cutting to maximize disc longevity.
• Rinse the disc thoroughly after each stage before stepping up to a finer grit to prevent cross-contamination.
• Wipe dry and store flat after use to maintain magnetic backing strength and plate flatness.