The Professional Standard for Radial Disc Finishing
The Dedeco 7/8″ radial disc is considered the benchmark size for most finishing applications.
It provides enough surface area to work efficiently on flat and curved surfaces, while still offering the control needed for detailed work. For many users, this is the only size required for the majority of tasks.
Why Choose the 7/8″ Size?
Balanced Performance
Combines surface coverage with precision, making it suitable for a wide range of applications.
Consistent Control
Ideal peripheral speed for micromotors and flexible shaft machines.
Flexible Setup
Can be used as a single disc or stacked to create a wider polishing head
Designed for Stacking & Versatility
The 7/8″ format works particularly well when stacked on an MM503 mandrel.
Benefits of stacking
- Increased contact area
- Faster material removal
- More consistent finishing across curves
Typically, users stack 3–6 discs depending on the task.
Explore pre-assembled Dedeco Sunburst 7/8″ TC 4-Ply Sets.
Typical Applications
Jewellery & Precious Metals
- Removing fire scale
- Smoothing cast surfaces
- Pre-polishing and finishing
Engineering & Fabrication
- Light deburring
- Cleaning oxidised components
- Surface preparation
Restoration & Decorative Work
- Cleaning intricate castings
- Preserving surface texture
Automotive & Electrical
- Cleaning contacts and small components
- Detailing metal parts
Grit Range
| Colour | Grade | Typical Use |
|---|---|---|
| Yellow (Coarse) |
80 Grit (Aluminium Oxide) |
Heavy cleaning |
| White (Medium) |
120 Grit (Aluminium Oxide) |
Light deburring |
| Red (Standard) |
220 Grit (Aluminium Oxide) |
Blending & surface prep |
| Blue (Fine) |
400 Grit (Aluminium Oxide) |
Fine finishing |
| Pink (Fine) |
600 Grit (Pumice) |
Pre-Polishing |
| Peach (Extra-Fine) |
6 Micron (Aluminium Oxide) |
Fine polishing |
| Light Green (Ultra-Fine) |
1 Micron (Aluminium Oxide) |
Final high finish |
Mandrel Compatibility
These discs use a 1.6mm centre hole and require a compatible mandrel for mounting.
Use with: MM503 screw-top mandrel (2.35mm or 3mm shank)
Not compatible with: MM304 (3mm screw for 1″ discs)
Operating Guidelines
Recommended Speed:
3,000 – 18,000 RPM (5,000 RPM for Woodworking)
Stacking & Orientation:
For best results, stack 3–6 discs to create a flexible, cushioned abrasive head.
Ensure the bristle curvature follows the direction of rotation.
Technique:
Use light pressure and allow the bristles to conform to the surface.



























