8" x 1-1/2" Diamond Plastic Hub Flat Grinding Wheel for Lapidary & Glass

The 8" x 1-1/2" Diamond Plastic Hub Flat Grinding Wheel is a lightweight, vibration-dampening electroplated hard wheel designed for commercial lapidary cabbing machines, gemstone preforming, and precision glass cold working. Built with a high-impact, precision-molded balanced plastic core and an electroplated multi-layer monocrystalline diamond face, this wheel delivers aggressive stock removal, rapid beveling, and flat contour shaping across agates, jaspers, quartz, petrified wood, and art glass while minimizing machine spindle load.

Key Features

• Precision-Molded High-Impact Plastic Hub: Lightweight core significantly reduces rotational inertia, easing startup torque on cabbing machine motors while running true without rotational wobble.
• Dense Monocrystalline Diamond Coating: Uniformly electroplated diamond particles deliver fast, consistent cutting action and extended tool life across Mohs 5 to 9 gemstones.
• Rigid Flat Grinding Face: Maintains a true, flat reference surface across its full 1-1/2" width, ideal for flattening cabochon backs, squaring preforms, and facet beveling.
• Standard 1" Arbor with Reducer Bushings: Includes precision bushings to adapt seamlessly to 3/4", 5/8", and 1/2" standard machine arbors.
• Complete Grit Progression: Available from coarse roughing (45, 60, 80 Grit) through intermediate smoothing (100, 180, 220 Grit) to fine pre-polish preparation (320, 600 Grit).

Applications

• Lapidary Cabbing & Preforming: Rapid rough shaping, contouring, and back flattening on agate, jasper, quartz, jade, and petrified wood.
• Glass Cold Working & Beveling: Edge grinding, facet grinding, and rapid stock removal on art glass, thick crystal, and fused glass slabs.
• Ceramic & Mineral Specimen Shaping: Precision flattening and squaring of technical ceramics, geode halves, and mineral collector display pieces.

Technical Specifications

• Diameter: 8 inches (200 mm)
• Width: 1-1/2 inches (38 mm)
• Arbor Size: 1 inch (includes 3/4", 5/8", 1/2" reducer bushings)
• Hub Material: High-Impact Precision-Molded Engineered Composite/Plastic
• Bond Type: High-Strength Nickel Electroplated Diamond
• Available Grits: 45, 60, 80, 100, 180, 220, 320, 600 Grit
• Recommended Operating Speed: 1400–1800 RPM

Operating Guidelines

• Always operate with continuous, generous flood water coolant to lubricate the wheel, suppress dust, and flush rock swarf.
• Apply light to moderate hand contact; allow the diamond abrasive to grind naturally without excessive pushing.
• Store dry and clean after use to keep the diamond abrasive face in optimal cutting condition.