12 in Diamond Flat Lap Disc with Magnetic Backing for Precision Grinding & Polishing

Overview

The 12 in Diamond Flat Lap Disc with Magnetic Backing is a heavy-duty, professional-grade electroplated diamond grinding disc engineered for 12-inch lapidary flat lap machines, rotary glass grinding units, and precision stone faceting equipment. Featuring a full-face precision electroplated diamond coating bonded to a rigid disc core with a magnetic or PSA backing system, this flat lap allows swift disc swaps and delivers exceptional flatness and uniform stock removal across glass, ceramics, gemstones, and hard minerals.

Key Features

• Full-Face Diamond Coverage: Evenly distributed, high-concentration diamond abrasive delivers uniform cutting action across the entire 12-inch surface without premature bald spots.
• Magnetic & PSA Backing Options: Designed for seamless integration with magnetic master laps or standard flat plates, enabling swift grit transitions during multi-stage lapidary workflows.
• Precision Flatness: Rigid machined disc base resists flexing under grinding pressure, ensuring flat facets, clean edges, and uniform bevels on large slabs and stones.
• Wide Grit Range (45 to 600 Grit): Covers aggressive material hogging, rough shaping, fine smoothing, and pre-polish preparation.
• Wet Grinding Durability: Engineered for continuous water-cooled operation to prevent heat build-up, prolong tool life, and eliminate airborne dust.

Applications

• Gemstone rough shaping, cabochon grinding, and facet pre-polishing
• Large art glass beveling, edge smoothing, bottle neck finishing, and cold glass fabrication
• Flattening and finishing ceramic, porcelain, and pottery bases
• Smoothing mineral specimens, large agate slabs, quartz, and petrified wood

Technical Specifications

• Disc Diameter: 12 inches (300 mm)
• Abrasive Type: Precision Electroplated Diamond
• Backing System: Magnetic Backing / Pressure Sensitive Adhesive (PSA)
• Available Grits: 45, 60, 80, 100, 140, 200, 270, 325, 600 Grit
• Machine Compatibility: 12-inch flat lap machines (Hi-Tech Diamond, Covington Engineering, Inland, Lortone, and Hans flat laps)

Operating Guidelines

• Always operate with adequate water coolant to lubricate the grinding zone and flush away swarf.
• 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.
• Ensure the master lap plate is clean and dry before applying magnetic or PSA discs to maintain absolute flatness.