8"x3" Expandable Rubber Drum Wheel for Lapidary Sanding & Polishing

The Expandable Rubber Drum Wheel is a professional-grade lapidary sanding and polishing accessory designed for use with diamond sanding belts and silicon  carbide belts. Engineered for true-running performance with no wobble or bounce, this Expandable rubber expands under rotation to hold belts securely in place, allowing fast grit changes and smooth, consistent results. Its durable rubber construction flexes to gemstone contours at low speeds for superior surface contact and acts like a hard rubber grinding wheel at high speeds, making it ideal for shaping, smoothing, and polishing gemstones, cabochons, glass, ceramics, and metals. The convex surface efficiently removes flats and scratches, while the slightly harder-durometer rubber minimizes cupping. Precision-machined hubs include bushings to fit 1”, 3/4”, 5/8”, and 1/2” arbors, ensuring compatibility with most lapidary machines. Available in multiple sizes and sold without belts, this expandable sanding drum is an essential tool for professional lapidary artists and hobbyists who need reliable control, quick belt changes, and a flawless pre-polish or polish finish. Maximum speed: 1800 RPM. Always use withbelts in place.