4" Diamond Flat Lap Wheel 36–3000 Grit Lapidary Grinding Disc

4" Diamond Coated Flat Lap Wheel – Lapidary Polishing & Grinding Disc

Take your lapidary and precision grinding projects to the next level with this 4-inch (100mm) Diamond Coated Flat Lap Wheel. Available in single or double-sided diamond coating and a wide range of grits from coarse 36 to ultra-fine 3000, this versatile disc delivers consistent, professional-grade results on gemstones, glass, crystal, agate, jade, and more.

Made in Mainland China.

Key Features

• Diameter: 4 inch / 100mm
• Bore: 16mm — fits most standard angle grinders and power drills
• Thickness: 1mm
• Available Grits: 36 / 46 / 60 / 80 / 120 / 150 / 180 / 240 / 320 / 400 / 600 / 800 / 1000 / 1200 / 1500 / 2000 / 3000
• Diamond Coating: Single-side or double-side options available
• Wet & Dry Use: Flexible for both wet and dry grinding applications
• Material: Industrial-grade metal base with diamond coating

What Can You Use It For?

This flat lap wheel is ideal for a wide range of precision applications:

• Lapidary work — polishing and shaping gemstones, jade, agate, and crystals
• Glass and electronic tube grinding
• Arts and crafts — precious stones and decorative materials
• Precision machining and industrial surface finishing

How to Use

Simply mount the disc onto a compatible angle grinder or power drill using the 16mm bore. Select your grit based on your task — start with a coarser grit for shaping and material removal, then work progressively finer for polishing and finishing. Use wet or dry depending on your material and preference.

Package Includes

• 1 × 4" (100mm) Diamond Coated Flat Lap Grinding Disc

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Frequently Asked Questions

Q: What grits are available for this diamond flat lap wheel?

A: This diamond coated flat lap wheel is available in 17 grit options ranging from coarse to ultra-fine: 36, 46, 60, 80, 120, 150, 180, 240, 320, 400, 600, 800, 1000, 1200, 1500, 2000, and 3000 grit — covering every stage from rough shaping to mirror-finish polishing.

Q: Can this disc be used for lapidary work on gemstones and crystals?

A: Yes! This 4" diamond flat lap wheel is specifically designed for lapidary applications including grinding, shaping, and polishing jade, agate, crystal, precious stones, and glass. It works with both angle grinders and power drills for versatile use.

Q: Is this grinding disc compatible with wet and dry use?

A: Absolutely. The diamond flat lap wheel supports both wet and dry grinding. Wet use can extend the disc's life and reduce dust, while dry use offers convenience for quick tasks. Always ensure your tool is rated for wet use if you choose to use it with water.

Q: What is the difference between single-side and double-side diamond coating?

A: A single-side diamond coated disc has abrasive material on one face only, while a double-side disc is coated on both faces — effectively doubling its usable surface and extending its overall lifespan before replacement is needed.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.