8" x 1-1/2" 4-Grit Set Diamond Nova Resin Grinding Wheel for Lapidary & Glass

The 8" x 1-1/2" 4-Grit Set Diamond Nova Resin Soft Grinding Wheels is an extra-large diameter pre-polishing and fine-smoothing collection designed for lapidary cabochon makers, gemstone cutters, and studio glass artisans. Featuring an expanded 8-inch diameter for greater surface speed and grinding efficiency, this matched 4-wheel set contains premium industrial diamond abrasives embedded in cushioned resin matrices to provide smooth, flat-spot-free transitions from rough shaping to a flawless high-luster polish across large slabs, cabochons, and glassware.

Set Inclusions & Progressive Grit Sequence

• 280 Grit (Initial Smoothing): Rapidly removes coarse diamond scratches, flat spots, and tool marks left by hard electroplated or sintered wheels.
• 600 Grit (Fine Smoothing): Refines cabochon curvature, eliminates fine scratches, and imparts an even satin finish.
• 1200 Grit (Pre-Polish): Produces a silky, translucent finish on mineral slabs and prepares glass edges for final polishing.
• 3000 Grit (High-Luster Pre-Polish): Delivers an exceptional glossy finish on hard gemstones and studio glass, readying them for final buffing.

Key Features

• High-Velocity 8" Diameter: Delivers higher SFPM (surface feet per minute) and a larger grinding surface, speeding up workflow on large mineral slabs and glass pieces.
• Resilient Shock-Absorbing Matrix: Soft flexible resin layer conforms to curved cabochon crowns, preventing flat-spotting, chipping, and micro-faceting.
• Uniform Diamond Dispersion: Homogeneously dispersed diamond matrix wears evenly, constantly revealing sharp cutting facets throughout wheel life.
• Universal 1" Arbor with Reducer Bushings: Each wheel features a 1-inch precision arbor hole and includes reducer bushings to fit 3/4", 5/8", and 1/2" shafts.
• Complete 4-Wheel Workflow Kit: Cost-effective professional progression covering every essential stage from initial smoothing to brilliant pre-polish.

Applications

• Lapidary Cabbing & Finishing: Smoothing and pre-polishing large cabochons of agate, jasper, turquoise, quartz, opal, jade, and petrified wood.
• Glass Cold Working: Blending ground edges, smoothing fire-polished edges, and polishing studio art glass.
• Mineral Specimen Preparation: Pre-polishing curved surfaces and display faces on large mineral slabs and fossils.

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 per wheel)
• Set Quantity: 4 Wheels (280, 600, 1200, 3000 Grit)
• Hub Construction: High-Impact Balanced Composite Core with Resilient Foam Cushion
• Bond Type: Resilient Resin Bond Diamond Matrix
• Recommended Operating Speed: 1400–1800 RPM

Operating Guidelines

• Always operate with continuous, steady water coolant to lubricate the wheel face, flush mineral swarf, and prevent heat buildup in the resin bond.
• Apply light to gentle hand contact; excessive pressure causes premature resin wear without improving cutting speed.
• Never dig sharp gemstone corners or points into the wheel face to prevent gouging the flexible resin layer.