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8 inch Lapidary Cabbing Grinder

8 inch Lapidary Grinder Unit_edited.jpg

Our 8" Lapidary Cabochon Cabbing Grinder, a high-quality machine designed for use in the glass, ceramic, crystal, and superhard material industries. This cabbing machine boasts a 1" stainless steel shaft with ball bearings, 7pcs aluminum spacers and flanges, and a locknut for secure operation. The thermal protected ball bearing motor is 3/4HP and provides reliable power for all your grinding and polishing needs. The hood is made of durable 304 stainless steel for long-lasting use.
One of the standout features of this cabbing machine is the adjustable drip water system with 8 shut off valves for each wheel. This system ensures that your wheels stay cool and lubricated during use, resulting in smoother, more efficient grinding and polishing. The shaft is tapped for a ¼-20 spin-on polish head on the right end and a 1/2" aluminum lap or diamond facet laps on the left end, providing versatility for a range of applications. The machine accepts silicon carbide or diamond wheels or rubber expandable drums, making it suitable for a variety of materials.
Compared to other lapidary cabbing machines on the market, such as the Cab King Lapidary, EZ Cab Machine, Lortone Cabbing Machine, and Diamond Pacific Cabbing Machine, our 8" Lapidary Cabochon Cabbing Grinder offers several advantages. Firstly, our machine features a larger work space, allowing for more efficient processing of larger pieces. Additionally, the 3/4HP motor provides more power than some comparable models, while the adjustable drip water system ensures consistent cooling and lubrication. Finally, our machine is competitively priced and offers exceptional value for the quality and features it provides.
In summary, our 8 Lapidary Cabochon Cabbing Grinder is a versatile and reliable machine that is ideal for use in a range of industries. With its sturdy construction, powerful motor, and adjustable drip water system, it is a top choice for professionals and hobbyists alike.


The performance of metal bonded diamond grinding wheels is influenced by various factors, including the wheel's design, the diamond grit size and concentration, the material being ground, and the grinding parameters. key performance aspects of these grinding wheels:

  1. Material Removal Rate: Metal bonded diamond grinding wheels are known for their high material removal rates. They can remove material quickly and efficiently, making them suitable for applications where productivity is critical.

  2. Precision Grinding: These wheels offer exceptional precision in grinding operations. They can achieve tight tolerances and fine surface finishes, making them ideal for applications that require accuracy and surface quality.

  3. Longevity: Metal bonded diamond grinding wheels are durable and have a long service life compared to other types of abrasive wheels. Their robust construction allows them to withstand heavy use without significant wear.

  4. Cooling: Metal bonds provide good heat dissipation during grinding, which helps prevent overheating and reduces the risk of thermal damage to the workpiece. This is especially important when grinding materials like ceramics and glass.

  5. Versatility: They are versatile and can be used for grinding a wide range of materials, including hard metals, ceramics, glass, stone, composites, and more. This versatility makes them suitable for various industries and applications.

  6. Edge Retention: Metal bonded wheels maintain their cutting edges well, ensuring consistent performance throughout their lifespan. This is crucial for maintaining part geometry and achieving precise dimensions.

  7. Reduced Dressing Frequency: Metal bonded diamond grinding wheels require less frequent dressing or truing compared to some other types of wheels, saving time and ensuring consistent wheel geometry.

  8. Low Vibration: Properly balanced metal bonded wheels exhibit minimal vibration during operation, contributing to stable and controlled grinding processes.

  9. Customization: Manufacturers can tailor metal bonded wheels to meet specific application requirements by adjusting factors such as diamond grit size, concentration, and bond hardness.

  10. Surface Finish: These wheels can achieve fine surface finishes, reducing the need for additional finishing processes in many applications.

  11. Workpiece Quality: Metal bonded diamond wheels contribute to the quality of the finished workpiece by producing precise and dimensionally accurate components.

  12. Consistency: They offer consistent performance from wheel to wheel, ensuring uniformity in the final products.

  13. Safety: Properly used and maintained metal bonded grinding wheels contribute to a safer working environment by reducing the risk of wheel breakage and overheating.

Grit Range

Metal bonded diamond grinding wheels are available in various grit sizes to accommodate different grinding and surface finish requirements. The grit size determines the coarseness or fineness of the abrasive particles on the wheel's surface. Here are the typical grit size classifications for metal bonded diamond grinding wheels:

  1. Coarse Grits (e.g., 60, 80, 100):

    • Coarse grit wheels are used for rapid material removal and are suitable for rough grinding applications.

    • They are often used when the initial shape and dimension of the workpiece need significant adjustment.

    • Coarse grit wheels leave a rougher surface finish.

  2. Medium Grits (e.g., 180, 220):

    • Medium grit wheels strike a balance between material removal and surface finish.

    • They are suitable for general-purpose grinding tasks where both removal rates and surface quality are important.

    • Medium grit wheels produce a moderate surface finish.

  3. Fine Grits (e.g., 360, 600):

    • Fine grit wheels are used for precision grinding applications where surface finish is critical.

    • They excel at producing smooth and fine surface finishes while still removing material effectively.

    • Fine grit wheels are commonly used for applications that require high precision and tight tolerances.


Metal bonded diamond grinding wheels are versatile tools used in various applications across different industries. Their exceptional hardness and durability make them suitable for precise and aggressive material removal. Here are common applications for metal bonded diamond grinding wheels:

  1. Precision Grinding: These wheels are used for precision grinding operations that require tight tolerances and fine surface finishes. Industries such as aerospace, automotive, and tool manufacturing rely on them for grinding components to exact specifications.

  2. Tool Sharpening: Metal bonded diamond wheels are used to sharpen a wide range of cutting tools, including carbide and high-speed steel (HSS) tools, drills, end mills, and turning inserts. They ensure tools maintain their cutting edges for improved performance.

  3. Glass and Ceramic Grinding: Diamond grinding wheels are essential in the glass and ceramics industries for shaping, edging, and grinding glass panes, lenses, optical components, and ceramic parts with precision.

  4. Stone and Concrete Grinding: These wheels are commonly used in the construction and masonry industries to grind and shape natural and engineered stone, concrete, and terrazzo. They are used for leveling, smoothing, and preparing surfaces for finishing.

  5. Metal Grinding: While primarily used for non-metallic materials, metal bonded diamond grinding wheels can also be employed for grinding hard and brittle metals such as tungsten carbide, titanium, and stainless steel.

  6. Semiconductor and Electronics: Metal bonded diamond wheels play a crucial role in the semiconductor industry for precision grinding and dicing of silicon wafers, gallium arsenide, and other semiconductor materials.

  7. Optical Lens Manufacturing: In optical lens manufacturing, these wheels are used to grind and shape lenses and optical components to achieve the desired curvature and optical properties.

  8. Composite Materials: Industries involved in manufacturing composite materials, such as aerospace and automotive, use metal bonded diamond wheels for grinding and shaping composite parts made of carbon fiber and epoxy resin.

  9. Jewelry Making: Jewelry artisans and manufacturers use these wheels for grinding and shaping gemstones, diamonds, and precious metals. They enable the creation of intricate jewelry designs.

  10. Woodworking: In some woodworking applications, metal bonded diamond grinding wheels are used to shape and sharpen cutting tools, such as planer blades and router bits.

  11. Saw Blade Maintenance: They are used for resharpening and maintaining the cutting edges of diamond saw blades, ensuring efficient cutting performance.

  12. Ceramic Tile Manufacturing: Metal bonded diamond grinding wheels are employed in the ceramic tile industry for shaping and profiling tiles before firing.

  13. Edge Grinding and Beveling: These wheels are used for edge grinding and beveling applications, such as beveling the edges of glass panels and mirrors.

  14. Surface Preparation: In surface preparation applications, they are used to remove coatings, adhesives, and uneven surfaces from concrete and other substrates.

  15. Medical and Dental: In the medical and dental fields, metal bonded diamond grinding wheels are used for grinding and shaping various materials, including dental prosthetics and orthopedic implants.

  16. Lapidary and Gem Cutting: Enthusiasts and professionals in the lapidary and gem cutting industry use these wheels to shape and polish gemstones and minerals.


The 8-inch Lapidary Cabbing Grinder comes with several features and components that make it suitable for lapidary work.

  1. Durable Motor: It is equipped with a direct drive 3/4HP motor capable of running at 1500 and 1800 RPM. This motor provides reliable power for grinding and polishing tasks.

  2. Voltage Options: The grinder offers voltage options of 220/240/110V, providing flexibility for various power sources.

  3. Cooling System: The independently controlled drip water cooling system helps keep the grinding and polishing wheels and the material being worked on cool during operation.

  4. Stainless Steel Hood: The grinder features a stainless steel, removable hood that helps contain debris and water splash, making it durable and easy to clean.

  5. Drip Pans: The grinder includes rust-free drip pans that can be set up for forward or rear drainage, helping to keep your workspace clean.

  6. Water Pump: It comes with a separate, mute submersible water pump to supply water for cooling and lubrication.

  7. Water Drainage System: An efficient water drainage system is designed to eliminate the need for constantly draining drip pans, enhancing convenience during use.

  8. Splash Guards: Two hood splash guards and four wheel splash guards are included to protect the user from debris and water spray.

  9. Accessories: The grinder comes with various accessories, including plastic stone boxes, a waterproof pinafore, a hand rest, a water pipe, and an LED lamp to facilitate your lapidary work.

  10. Shaft and Bearings: It features 1" shafts and ball bearings.

  11. Diamond Grinding Wheels: The grinder includes a set of 8"x1.5" diamond soft grinding wheels in different grits (280, 600, 1200, 3000), an 8"x1.5" diamond hard grinding wheel (80, 220), and an 8"x1/2" 360-grit diamond standard faceting lap. These diamond wheels and laps are essential for grinding and polishing gemstones.

  12. Prepolishing Pad: A 14000-grit diamond prepolishing pad is included for achieving a high-quality surface finish on your gemstones.

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Q: How do you use a diamond pad?

A diamond hand pad is a handheld abrasive tool with a flexible surface coated with diamond particles. It is used for grinding, smoothing, and polishing various materials, including stone, concrete, glass, and metal.

Q: How do I choose the right grit size for my project?

Select the grit size based on the initial condition of your workpiece and the desired level of surface finish. Coarse grits are suitable for rough grinding, while finer grits are used for smoothing and polishing.

Q: What safety precautions should I take when using diamond hand pads?

Wear safety goggles, a dust mask, and gloves to protect yourself from dust and debris. Additionally, work in a well-ventilated area or wear a respirator if working with fine dust particles.

Q: How do I maintain and clean my diamond hand pad?

After use, rinse the diamond hand pad with clean water to remove debris and residues. Gently pat it dry or allow it to air dry. Proper maintenance can prolong the pad's lifespan.

Q: What are some common applications for diamond hand pads?

Wear safety goggles, a dust mask, and gloves to protect yourself from dust and debris. Additionally, work in a well-ventilated area or wear a respirator if working with fine dust particles.

Q: What are the common grit sizes for diamond hand pads?

Diamond hand pads come in a range of grit sizes, from coarse (e.g., 50 grit) to fine (e.g., 3000 grit). The choice of grit depends on the specific task, with coarser grits used for material removal and finer grits for polishing.

Q: Do I need to use water or lubricant with a diamond hand pad?

Yes, using water or a specific lubricant is often necessary. It helps keep the surface cool, prevents overheating, and improves the effectiveness of the diamond particles in grinding and polishing. Some materials require dry grinding, so it's essential to check the manufacturer's recommendations.

Q: Can I use a diamond hand pad for dry grinding and wet grinding?

The suitability of a diamond hand pad for dry or wet grinding depends on the material and the pad itself. Some diamond hand pads are designed for wet use, while others are suitable for dry grinding. Check the manufacturer's specifications for guidance.

Q: Can diamond hand pads be used on curved or irregular surfaces?

Yes, diamond hand pads are versatile and can be used on flat, curved, or irregular surfaces. Their flexibility allows for contouring and shaping of various workpieces.

Q: Can I achieve a high-polish finish with a diamond hand pad?

Yes, with the right technique and progression through finer grits, you can achieve a high-polish finish on various materials using diamond hand pads. The finest grits are typically used for the polishing stage.

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