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

Overview

The 18 in Diamond Flat Lap Disc with Magnetic Backing is a heavy-duty, industrial-scale electroplated diamond grinding disc engineered for 18-inch lapidary flat laps, commercial glass grinding units, and precision stone faceting equipment. Featuring a full-face electroplated diamond matrix bonded to an ultra-rigid disc core with a magnetic or PSA backing system, this flat lap allows swift disc changeovers, dependable stability, and uniform stock removal across large glass sculptures, ceramic slabs, gemstones, and hard minerals.

Key Features

• Full-Face Diamond Coverage: Evenly distributed, high-concentration electroplated diamonds deliver consistent cutting action and uniform wear across the broad 18-inch surface.
• Magnetic & PSA Backing Options: Designed for rapid magnetic mounting onto steel master laps or adhesive backing plates, streamlining multi-stage grinding and smoothing workflows.
• Heavy-Duty Rigid Disc Core: Precision-ground base resists warping and 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

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

Technical Specifications

• Disc Diameter: 18 inches (450 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: 18-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.