8" Precision 1/4"-20 Left hand Screwback Master Lap

The 6" and 8" 1/4"-20 Right-Hand and Left-Hand Screwback Master Lap is a high-performance lapidary tool engineered for professional-grade surface finishing. Designed to work seamlessly with diamond polishing compounds, this master lap delivers consistent results across a wide range of materials. Available in both precision and economical variants, it caters to both hobbyists and professional seeking reliable, cost-effective solutions in gem cutting, jewelry making, and stonefinishing.

Application

This versatile screwback master lap is ideal for precision polishing and grinding applications involving:

• Gemstones
• Glass
• Ceramics
• Stone

It supports critical workflows such as shaping, pre-polishing, and final finishing in lapidary and jewelry workshops. Whether used by hobbyists or professional lapidists and jewelers, it ensures uniform material removal and superior surface quality on flat or contoured surfaces.

Key Features

• Dual-thread compatibility: Supports both Right-Hand and Left-Hand 1/4"-20 screwback mounts for universal machine integration.
• Two size options: 6-inch and 8-inch diameters provide broad, stable working surfaces for efficient coverage.
• Premium construction: Made from durable aluminum or composite materials for long service life and thermal stability.
• Optimized for diamond media: Fully compatible with diamond compounds, pastes, lapping powders, and flexible abrasive belts.
• Precision-ground flatness: Ensures even, consistent contact for smooth finishes, minimal vibration, and extended lap life.
• Ideal for multi-material use: Excels in gemstone shaping, glass and crystal finishing, and ceramic & stone polishing