What is a Diamond Cup Wheel?

A diamond cup wheel is a powerful tool used for surface grinding and processing, known for its high removal capacity and long service life. Ideal for preparing substrates for further coatings, diamond cup wheels are essential for large surface areas like walls and floors.

Uses of Diamond Cup Wheels

Diamond cup wheels are used for:

• Removing residues
• Leveling surfaces
• Cleaning surfaces
• Grinding and finishing

Depending on the application, the mounts, diameter, structure, and properties of the cup wheels vary.

Structure of a Diamond Cup Wheel

A diamond cup wheel consists of two main parts: the round metal base and the abrasive segment. The wheel's cup shape facilitates efficient dust transport. It attaches to an angle grinder with a quick-clamping nut, ensuring the wheel lays flat on the surface, allowing efficient chip removal through holes in the wheel.

Segment Types of Diamond Cup Wheels

There are mainly two types of segments:

• Diamond segments: Ideal for grinding mineral substrates like concrete, hard screed, mortar, plaster, tile adhesive, and granite.
• PKD segments: Made of synthetic diamonds, used for peeling wood, plastic, and non-metals, offering high wear resistance and efficiency without clogging.

Common Segment Types

1. T-Segment
2. Roof Segment
3. Double Row Segment
4. Turbo Segment

These segments are designed for varying levels of removal and sanding, with the arrangement affecting performance and aggressiveness.

Applications of Diamond Cup Wheels

Diamond cup wheels are suitable for:

• Finishing concrete elements
• Grinding concrete parts
• Sanding weathered concrete or cement plaster
• Leveling screed
• Breaking edges
• Removing tile and carpet adhesive
• Sanding off paint and finishes
• Removing rust
• Smoothing rough surfaces
• Grinding abrasive materials
• Leveling screed
• Grinding natural stone
• Removing formwork transitions and epoxy resin coatings

PKD Cup Wheel vs. Diamond Cup Wheel

PKD cup wheels use synthetic diamonds for high wear resistance and efficiency, ideal for removing putty, old coatings, carpet residue, adhesives, and vinyl floors. They are less suitable for high cutting speeds due to brittleness and temperature sensitivity. Both cup wheels can be used in stages for different removal tasks.

Compatible Machines for Diamond Cup Wheels

Diamond cup wheels are driven by rotary motion and can be used with:

• Angle grinders
• Concrete grinders
• Floor grinders
• Renovation milling machines

Using Diamond Cup Wheels with Angle Grinders

Angle grinders are ideal for smaller grinding jobs. They are part of standard equipment for craftsmen and DIY enthusiasts, offering flexibility and ease of use. Ensure the grinder operates at a minimum of 6,000 rpm for effective performance.

Common Sizes for Angle Grinders

• 115 mm
• 125 mm
• 180 mm
• 230 mm

Safety Tips

Always follow safety standards when working with diamond cup wheels, as they can operate at speeds up to 12,000 rpm. Ensure the wheels are tested and compliant with DIN EN 13236 standards for safety.

By understanding the structure, types, and applications of diamond cup wheels, you can choose the right tool for efficient and effective surface processing.