8 in Diamond Channel Faceting Lap for Gemstone Faceting & Precision Polishing

The 8 in Diamond Channel Faceting Lap is an expanded-diameter lapidary lap designed specifically for precision gemstone faceting, high-efficiency stock removal, and fine pre-polishing. Engineered with an innovative interrupted-surface channel pattern, diamond abrasive plateaus are separated by dedicated recessed channels that actively channel away swarf and coolant during wet grinding. Pre-mounted on a precision-machined aluminum master lap, it delivers maximum surface area, rock-solid stability, and true, wobble-free rotation on standard 1/2" arbor faceting machines.

Key Features

• Continuous Slurry Clearance: Recessed channel pattern continuously whisks away mineral slurry and cutting debris, preventing wheel loading and glazing while sustaining maximum cutting speed.
• Expanded 8" Working Surface: Delivers significantly greater surface area and higher peripheral speed than 6" laps, accelerating facet cutting on larger stones and production batches.
• Pre-Mounted Aluminum Master Base: Bonded directly to a balanced, rigid aluminum master lap for maximum stability, flat reference planes, and true running without flex.
• Precision Electroplated Diamond: High-density, uniformly distributed industrial diamond grit provides aggressive material removal and predictable, repeatable facet finishes.
• Full Progressive Grit Range: Available from coarse 60 grit for fast roughing and pre-forming down to ultra-fine 3000 grit for smooth, scratch-free pre-polish facet alignment.
• Standard 1/2" Arbor: Compatible with all standard 8-inch gemstone faceting machines, flat lap grinders, and precision lapidary arbors.

Applications

• Gemstone Faceting: Roughing, pavilion and crown cutting, facet placement, and pre-polishing on corundum (sapphire, ruby), beryl (emerald, aquamarine), quartz, tourmaline, and garnets.
• Hard Mineral Shaping: Shaping and surface leveling of tough lapidary cabochons, mineral specimens, and synthetics.
• Optical & Technical Glass: Precision beveling, planar edge prep, and chamfering on optical components and crystal blanks.

Technical Specifications

• Diameter: 8 inches (203 mm)
• Arbor Size: 1/2 inch (12.7 mm)
• Abrasive Material: Premium Industrial Diamond
• Bond Type: Precision Electroplated Bond
• Base Plate: Solid Aluminum Master Lap
• Surface Design: Channel Grooved Interrupted Surface
• Available Grits: 60, 80, 120, 180, 220, 280, 360, 600, 1200, 3000
• Recommended Operating Speed: 350–1200 RPM

Operating Guidelines

• Always operate with adequate water drip or recirculating coolant to flush swarf through channels and maximize diamond lifespan.
• Use light to moderate hand pressure; let the sharp diamond points cut cleanly without bogging down the faceting spindle.
• Rinse the channels thoroughly after use with clean water and allow to dry before storage to prevent residue accumulation.