6" x 1-1/2" 280 Grit Sintered Diamond Grinding Wheel (Metal Bonded)

The 6" x 1-1/2" 280 Grit Sintered Diamond Grinding Wheel (Metal Bonded) is a professional-grade continuous-rim grinding wheel engineered for high-precision lapidary work, cabochon preforming, and industrial glass cold working. Unlike electroplated wheels where diamond abrasive is limited to a single surface layer, this heavy-duty wheel features a full 5mm deep sintered metal-matrix cutting layer. As the bronze-metal matrix slowly wears during grinding, fresh sharp diamond crystals are continuously exposed, delivering consistent cutting performance and exceptional tool life across tens of thousands of workpieces.

Key Features

• 5mm Deep Solid Sintered Matrix: Diamonds are uniformly distributed throughout a 5mm thick metal bond layer, providing exceptional longevity that dramatically outperforms plated alternatives.
• Continuous Self-Sharpening Cutting Action: Controlled matrix erosion constantly exposes fresh, sharp monocrystalline diamond edges for consistent stock removal and scratch-free cabochon surfaces.
• Dressable Diamond Rim: Can be easily dressed with an aluminum oxide or silicon carbide dressing stick to true the profile or re-expose fresh diamond points.
• Precision-Balanced Core: Machined steel hub delivers smooth, vibration-free rotation at standard cabbing speeds (1400–1800 RPM), protecting motor bearings and improving workpiece precision.
• Standard 1" Arbor with Reducer Bushings: Includes precision bushing adapters to fit 3/4", 5/8", and 1/2" machine arbors seamlessly.

Applications

• Intermediate Pre-Polishing & Smoothing: Refining cabochon girdles and dome profiles on agate, jasper, quartz, jade, and sapphire following coarse shaping.
• Glass Cold Working & Beveling: Truing sawed glass borders, edge beveling, and smoothing cold-worked art glass components.
• Dense Mineral & Ceramic Grinding: High-precision stock reduction on technical ceramics, corundum, and dense mineral specimens.

Technical Specifications

• Diameter: 6 inches (152 mm)
• Width: 1-1/2 inches (38 mm)
• Grit: 280 Grit (Fine Shaping / Intermediate 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 operate with continuous, generous water cooling to flush sludge, maintain low temperatures, and prevent thermal diamond degradation.
• Apply light to moderate contact pressure; allowing the diamond to grind naturally preserves the wheel profile and extends tool longevity.
• If cutting speed slows due to stone glaze or loading, run a dressing stick against the face with water to reveal fresh diamond crystals.