8" x 1-1/2" Diamond Radius Spherical Grinding Wheel for Lapidary & Glass

The 8" x 1-1/2" Diamond Radius Spherical Grinding Wheel is an expanded-diameter, precision-engineered convex radius grinding wheel designed for shaping cabochons, contouring curved gemstone surfaces, and cold-working art glass. Manufactured with a seamless, balanced steel rim electroplated with premium monocrystalline diamond abrasives, its crowned spherical profile eliminates flat spots and facet ridges, allowing lapidary artists and glass crafters to achieve smooth, flowing curves with exceptional surface uniformity.

Key Features

• Crowned Radius & Spherical Surface Profile: Precision-contoured outer face effortlessly creates smooth, uniform dome radiuses on cabochons and lenses without creating faceting ridges or flat facets.
• Expanded 8" Diameter: Provides higher surface cutting speeds (SFPM) and a broader contact area than 6" wheels, accelerating material removal on larger gemstone slabs and glass vessels.
• Seamless Balanced Steel Rim: Heavy-duty solid steel rim core delivers vibration-free rotation, zero deflection, and reduced operator hand fatigue during extended shaping sessions.
• High-Density Electroplated Diamond: Uniformly coated with sharp monocrystalline diamond particles for fast, cool-cutting stock removal and prolonged abrasive longevity.
• Universal 1" Arbor with Reducer Bushings: Precision 1-inch center arbor hole includes standard bushings to fit 3/4", 5/8", and 1/2" machine shafts.
• Comprehensive Grit Range: Available from coarse 60 grit for aggressive roughing and glass beveling down to 600 grit for fine pre-polish finishing.

Applications

• Lapidary & Gemstone Cabbing: Doming, contouring, and refining round, oval, and freeform cabochons in agate, jasper, quartz, jade, and opal.
• Glass Art & Lens Finishing: Grinding punties, shaping round vessel rims, beveling cold glass sculptures, and profiling optical glass curves.
• Ceramic & Porcelain Detailing: Radiusing sharp edges, smoothing sculpted ceramic contours, and precision pottery trimming.

Technical Specifications

• Diameter: 8 inches (203 mm)
• Width: 1-1/2 inches (38 mm)
• Arbor Size: 1 inch (includes 3/4", 5/8", 1/2" reducer bushings)
• Rim Material: Seamless Precision-Balanced Steel
• Surface Profile: Radius Spherical (Convex Crown)
• Bond Type: Precision Electroplated Diamond
• Available Grits: 60, 80, 100, 180, 220, 320, 600
• Recommended Operating Speed: 1400–1800 RPM

Operating Guidelines

• Always operate with adequate water coolant to wash away mineral swarf and prevent thermal micro-fracturing in gemstones and glass.
• Apply light, continuous sweeping pressure across the curved face to ensure even abrasive wear and maintain the spherical profile.
• Rinse thoroughly after each use and dry completely before storage to protect the steel wheel and diamond bond.