3 Inch Convex Curve Diamond Grinding Wheel 30mm Height - Edge Grinding

In this review of the 3 inch convex curve diamond grinding wheel the bottom line is simple: it is a purpose-built disc for shaping and grinding stone edges, and it delivers reliable, coarse cutting where material removal matters. The reviewer found it most useful for craftspeople and stone fabricators who need a durable tool to grind marble, granite, rock and shell, especially when working on concave or curved edge profiles. Its 30mm diamond height and coarse 60 grit provide aggressive performance, and the wheel can be used dry or wet with a compatible angle grinder.

Key Features

• Convex curve profile: The curved shape makes it easier to grind consistent concave edges and rounded profiles on stone and tile.
• 30mm diamond height: The deep diamond layer gives long wear life and sustained cutting ability on hard materials like granite.
• 60 grit coarse diamonds: Coarse abrasive cuts quickly for shaping and edge work rather than fine polishing.
• Fits common angle grinders: The 22.23mm (7/8 in) arbor is compatible with 4 in, 4.5 in and 5 in angle grinders for workshop use.
• Dry or wet use: Usable with or without water depending on the task, which adds flexibility for different jobs and working conditions.

Who It's For

The wheel is aimed at stoneworkers, tile installers, lapidary hobbyists and small fabrication shops that need a robust tool for shaping and grinding the edges of marble, granite, rock and similar materials. It is particularly helpful when working on concave edge profiles, sink drain shoulders or decorative curved trims where a consistent curve is required.

Those who need fine polishing or a finished shine should look elsewhere or follow this wheel with finer grits, since the 60 grit is intentionally coarse and optimized for material removal rather than final polish. It also assumes the user has a compatible 4 in to 5 in angle grinder and basic safety equipment.

Pros & Cons

Pros

• Aggressive cutting power from the coarse 60 grit diamonds speeds shaping work on hard stone.
• Deep 30mm diamond layer extends usable life compared with thinner segments.
• Convex curve profile simplifies grinding consistent rounded edges and concave features.
• Works dry or wet, giving flexibility for different tasks and environments.

Cons

• Coarse grit means additional steps are required to achieve a polished finish.
• Limited to grinders with a 22.23mm (7/8 in) arbor, so an adapter may be needed for some tools.

Specifications

Diameter	3 in / 75mm
Arbor	22.23mm (7/8 in)
Grit	60 (coarse)
Diamond height	30mm
Compatible machines	4 in, 4.5 in, 5 in angle grinder
Use	Dry or wet

Our Verdict

The 3 in convex curve diamond wheel is a practical, value-minded choice for anyone needing fast, reliable edge shaping on marble, granite and similar materials. Its coarse 60 grit and 30mm diamond height make it durable and effective for heavy material removal and curved profiles, though users should expect to follow up with finer abrasives for a polished finish.

Frequently Asked Questions

Can this wheel be used wet and dry?
Yes, the wheel is designed for both dry and wet use so it can be used according to the job and working conditions.

What grinders will fit this arbor?
The wheel has a 22.23mm (7/8 in) arbor and fits most 4 in, 4.5 in and 5 in angle grinders; an adapter may be required for other sizes.

Is this suitable for polishing stone?
Not by itself; the 60 grit is coarse and best for shaping and edge grinding, followed by finer grits for polishing.