4” Diamond Grinding Cup for Porcelain & Granite (Angle Grinder) | DISTAR DGM-S

Professional 4" Diamond Grinding Cup for Tile & Stone

The DISTAR DGM-S 4" Diamond Grinding Cup is a professional edge grinding tool for porcelain tile and granite, designed for smooth, controlled material removal and precise finishing.

Built with a thin steel core and high-quality diamond segments, this angle grinder grinding cup delivers clean, chip-free results for both 90° edge shaping and 45° bevel grinding.

Achieve Smooth, Chip-Free Edges on Porcelain & Granite

Grinding dense materials like porcelain and granite can cause:

• Edge chipping
• Uneven finishes
• Excessive material removal
• Poor control

This diamond grinding cup for tile and stone helps:

• Maintain smooth edge quality
• Reduce chipping
• Improve control during grinding
• Deliver consistent results

👉 Ideal for professional finishing work

Designed for Both 90° and 45° Edge Grinding

This tile and stone grinding cup supports:

• 90° edge grinding → straight edge refinement
• 45° bevel grinding → miter edge preparation

👉 Perfect for modern tile installations and stone fabrication

Thin Steel Core for Controlled Grinding Performance

The thin steel core design provides:

• Softer, more controlled grinding
• Improved stability
• Better surface finish
• Reduced vibration

👉 Enhances both precision and finish quality

Choose the Right Grit for Your Application

Available in two grit options:

• 60/70 grit (Coarse) → Fast material removal and shaping
• 100/120 grit (Fine) → Smooth edge finishing

👉 Covers both aggressive grinding and final refinement

Dry Grinding for Jobsite Efficiency

This diamond grinding cup is optimized for:

• Dry operation
• No water required
• Cleaner, more convenient use

👉 Ideal for on-site and indoor work

High-Speed Performance for Efficient Grinding

Compatible with speeds up to 11,000 RPM, this angle grinder grinding cup delivers:

• Fast material removal
• Consistent performance
• Reliable durability

Universal Fit for Angle Grinders

This 4" grinding cup features a 5/8"-11 thread, making it compatible with:

• 5" angle grinders
• Most major grinder brands

👉 Easy installation and reliable performance

Tile & Stone Finishing Workflow

The DGM-S 4" fits naturally into a 3-step edge finishing process:

1. Cut — use a diamond blade for the initial cut
2. Grind — refine with the DGM-S 4" (90° or 45°)
3. Polish — finish with a polishing pad for a mirror edge

Common Applications

This diamond grinding cup for porcelain and granite is ideal for:

• Edge finishing porcelain tile
• Granite edge refinement
• 45° bevel grinding
• 90° edge shaping
• Surface preparation before polishing

Designed for Professionals

Perfect for:

• Tile installers
• Stone fabricators
• Granite countertop specialists
• Remodeling contractors
• Flooring professionals

Product Specifications

Specification	Detail
Diameter	4" (100 mm)
Thread	5/8"-11
Grit Options	60/70 (coarse), 100/120 (fine)
Max Speed	11,000 RPM
Cooling	Dry use
Application	Porcelain gres, granite, stone
Build	Thin steel core design
Brand	DISTAR

When Should You Use a 4" Diamond Grinding Cup?

Use this tile and stone grinding tool when:

• Refining tile edges after cutting
• Preparing bevel edges
• Smoothing granite edges
• Removing small imperfections
• Preparing surfaces for polishing

Grinding Cup vs Standard Grinding Wheels

Method	Result
Standard wheels	Rough finish, less control
Diamond grinding cup	Smooth, precise, durable

👉 This tool delivers professional-grade results

Frequently Asked Questions

What materials can this grinding cup be used on?

It is designed for porcelain tile, granite, and stone materials.

Can it be used for bevel grinding?

Yes, it supports both 45° bevel and 90° edge grinding.

Do I need water cooling?

No, it is designed for dry grinding applications.

What grit should I choose?

• 60/70 → shaping and removal
• 100/120 → finishing

What grinder does it fit?

It fits most 5" angle grinders with a 5/8"-11 thread.

Works Well With

• Soft Edge DGM-S 2" Grinding Cup — smaller version for detail edge work and tight areas
• DGM-S 2" Grinding Cup Nut — grinder-nut replacement for instant cut-to-grind workflow
• CoolPAD 4" Polishing Pad — final polish after grinding for a mirror edge finish
• Gres Master Diamond Blade — the cutting step before edge grinding
• Centrum PRO 2.0 Pad Holder — for mounting polishing pads in the same workflow
• LINER Cutting Guard — guided edge finishing system to pair with DGM-S for straight edges

Further Reading

• Cutting, grinding, and polishing porcelain tile for seamless 45° corners
• What is the best way to cut porcelain tile?
• Finishing cuts in porcelain tile without a tile saw
• Chip-free tile cutting tips for professionals

California residents: see Prop 65 Warning.

Professional tile contractors: contact us for volume pricing.