8" x 1.5" 280 Grit Diamond Hard Flat Grinding Wheel for Hard Materials

The 8" x 1.5" 280 Grit Diamond Hard Flat Grinding Wheel features a heavy-duty seamless solid steel core and a precision electroplated diamond rim. Built for ultra-fine smoothing, complete removal of intermediate grinding scratches, and pre-polish prep on materials including gemstones, rocks, glass, ceramics, and porcelain. Delivers true concentric rotation and vibration-free performance on standard 8" cabbing machines.

Key Features

• Solid Seamless Steel Core: Heavy-duty steel body ensures true-running concentricity and eliminates wheel vibration.
• Precision Electroplated Diamond Rim: Uniform 280-grit diamond plating bridges hard wheel grinding and resin wheel polishing with consistent, scratch-free results.
• True Flat Profile: Perfectly flat grinding face prevents dishing or crowning during shaping and faceting pre-forming.
• Universal 1" Arbor: Standard 1-inch inner bore fits standard lapidary cabbing machines (compatible with 3/4", 5/8", and 1/2" reducer bushings).

Applications

• Lapidary & Gemstones: Final hard-stage smoothing and pre-polishing of agate, jasper, quartz, jade, and petrified wood cabochons.
• Glass Cold Working: Fine edge beveling, satin surface smoothing, and scratch elimination on art glass and thick crystal slabs.
• Ceramic & Porcelain: Delicate surface smoothing, edge finishing, and pre-polish preparation of dense technical ceramics and mineral specimens.

Technical Specifications

• Diameter: 8 inches (200 mm)
• Width: 1.5 inches (38 mm)
• Grit: 280 Grit (Fine Pre-Polishing / Surface Refinement)
• Bond Type: Electroplated Diamond
• Core Material: Solid Steel
• Arbor Size: 1 inch (compatible with reducer bushings)
• Recommended Operating Speed: 1400–1800 RPM

Operating Guidelines

• Continuous Water Coolant Required: Always operate with adequate water flow to flush grinding swarf and keep diamond particles cool.
• Apply light, consistent workpiece pressure across the wheel face to prevent localized grooving.