8" x 1-1/2" 360 Grit Sintered Diamond Grinding Wheel (Metal Bonded)

The 8" x 1-1/2" 360 Grit Sintered Diamond Grinding Wheel (Metal Bonded) is a fine pre-polishing lapidary wheel designed for 8-inch vertical cabbing units and precision glass beveling stations. Engineered with a continuous 5mm solid sintered diamond rim suspended in a wear-resistant bronze alloy, this wheel bridges intermediate smoothing and ultra-fine polishing. It effaces remaining grinding lines with delicate precision, providing an exceptionally smooth, uniform semi-gloss ground finish on chalcedony, agate, jasper, quartz, jade, and artistic glass.

Key Features

• Continuous 5mm Solid Sintered Matrix: Fully saturated with fine 360-grit monocrystalline diamonds across the entire 5mm bronze depth, ensuring extraordinary durability and consistent cutting performance over years of heavy use.
• Precision Fine Pre-Polishing: Removes 220-grit scratches effortlessly, imparting a smooth, non-directional matte-to-semi-gloss surface that prepares gemstones perfectly for resin sanding or cerium oxide polishing.
• Self-Sharpening Cutting Action: Continuous controlled erosion of the bronze bond steadily uncovers fresh, pristine diamond facets during wet operation.
• Precision-Balanced Steel Core: Machined to strict tolerances to ensure completely vibration-free, smooth operation at 1400–1800 RPM, maintaining arbor bearing health.
• Standard 1" Arbor with Reducer Bushings: Includes precision reducing bushings to accommodate 3/4", 5/8", and 1/2" machine spindles securely.

Applications

• Fine Cabochon Pre-Polishing: Smoothing preformed gemstone crowns and calibrating uniform girdles on agate, jasper, petrified wood, and jade before resin sanding.
• Glass Cold Work Finishing: Fine smoothing and seam refinement on cut glass edges, bevels, and art glass components without chipping.
• Mineral Specimen Surface Prep: Eliminating visible scratches on flat display faces, fossil slabs, and crystal geodes.

Technical Specifications

• Diameter: 8 inches (200 mm)
• Width: 1-1/2 inches (38 mm)
• Grit: 360 Grit (Fine Pre-Polish)
• Diamond Layer Depth: 5 mm
• Arbor Size: 1 inch (includes 3/4", 5/8", 1/2" reducer bushings)
• Bond Type: Sintered Metal (Bronze Matrix)
• Recommended Operating Speed: 1400–1800 RPM

Operating Guidelines

• Always run with generous, continuous water lubrication to flush mineral swarf and prevent thermal stress.
• Use gentle, consistent pressure; allowing the diamond to grind naturally preserves the flat face and prolongs wheel lifespan.
• When swarf glaze develops on the wheel face, dress lightly with an aluminum oxide stick under running water to revive cutting bite.