Phenolic Polishing Laps

The 150mm x 1/2" Phenolic Star Cab Polishing Grinding Laps you described are a high-quality, specialized tool widely used by commercial cutters, particularly for polishing and final shaping of gemstones like sapphire, ruby, and garnet. These laps are not designed for faceting, but for cabochon (rounded or shaped stone) work, offering precise and efficient results. Here's a breakdown of the features:

Key Features:

  • Material: Made from hard fiber phenolic, these laps are known for their durability and ability to retain diamond compounds efficiently.

  • Grooved Design: The special grooved surface enhances the polishing process, improving the effectiveness of the diamond charge and allowing for better shaping.

  • Thickness and Precision: The laps are 10mm (7/16") thick, and they are ground flat and parallel to stringent standards, ensuring consistent and even results during polishing.

  • Size: The laps are 150mm in diameter, with a 12.5mm (1/2") center hole, which makes them compatible with many polishing machines.

  • Application: They are specifically designed for final shaping and polishing of stones like sapphire, ruby, and garnet, which are harder materials that require specialized tools to achieve a smooth, reflective finish.

Benefits for Users:

  • Durability: The phenolic material is tough and long-lasting, capable of withstanding extensive use without degrading quickly.

  • Efficiency: The grooves help to distribute the diamond compound more effectively, allowing the lap to hold the abrasive charge longer and providing more consistent results.

  • Precision: The flatness and parallel grind of the lap ensure that your polishing is even, reducing the risk of uneven wear or surface flaws on the gemstone.

  • Commercial-Grade Quality: Since these laps are used by professional cutters worldwide, they meet rigorous standards and are capable of handling high-demand commercial applications.