Diamond Sanding Grinding Disc 12in Grit 80 - Flat Lap Polishing Disk

In this review the uxcell Diamond Sanding Grinding Disc is evaluated as a utilitarian abrasive for hobbyists and small shops working with hard materials. The bottom line: this 12in, grit 80, diamond-coated flat lap disc delivers aggressive, controlled material removal on glass, stone and ceramics, and its A3 steel backing keeps the disc flat under load. For anyone needing a single-sided electroplated diamond wheel for bench lapidary or tile shaping, this disc is a practical choice rather than a precision finishing tool.

Key Features

• 12in diameter and grit 80: Provides a large working surface with a coarse grit for fast material removal on hard surfaces.
• 1.2mm steel thickness: The A3 steel base gives rigid support that reduces warping during heavy grinding tasks.
• Electroplated diamond coating: Diamond particles are bonded on one side to deliver durable, wear-resistant performance for extended use.
• Flat lap design: Produces an even grinding surface for controlled, repeatable removal ideal for lapidary and tile work.
• Wet or dry use: Can be used with water for better results and dust control, then wiped and dried to prevent rust.

Who It's For

This disc is aimed at lapidary hobbyists, tile and porcelain fabricators, and anyone who needs to shape or remove material from glass, stone, jade, agate and similar hard substrates. The coarse grit and large diameter make it especially useful for initial shaping and aggressive stock removal rather than fine polishing.

Those seeking a final polish or mirror finish should plan to follow up with finer grits or polishing pads. If a consumer needs a center-hole-mounted wheel for common bench grinders, this no-center-hole flat lap disc may not suit that specific mounting style.

Pros & Cons

Pros

• Large 12in surface speeds up grinding of bigger pieces and spreads wear for longer life.
• Sturdy A3 steel base maintains flatness and resists bending under pressure.
• Electroplated diamond layer is wear-resistant and stays attached for sustained cutting action.

Cons

• Only one side is coated with diamond, so users must orient the disc correctly for work.
• No center hole restricts mounting options on some standard grinders or spindles.

Specifications

Diameter	300mm / 12in
Grit	80
Thickness	1.2mm / 3/64in
Backing material	A3 steel
Coating	Electroplated diamond, one side
Usage	Wet or dry for glass, stone, ceramic, metal

Our Verdict

The uxcell 12in grit 80 diamond sanding disc is a solid, value-oriented choice for users who need aggressive, reliable stock removal on hard materials. Its rigid A3 steel base and electroplated diamond face deliver durability and flatness for lapidary and tile work, but plan to follow with finer abrasives for final polishing and confirm mounting compatibility since there is no center hole.

Frequently Asked Questions

Can this disc be used wet?
Yes; water grinding generally improves results and reduces dust, but dry thoroughly after use to prevent rust.

Is the diamond on both sides?
No; the diamond is electroplated on only one side, so that side must face the work.

Will this fit a standard bench grinder?
Not directly if your grinder requires a center hole; this is a no-center-hole flat lap disc and may need a compatible mounting system.