Precision Control with 3M Scotch-Brite Habras Discs
3M Scotch-Brite 19mm radial bristle discs are the smallest precision-detail format within the Scotch-Brite radial disc range. Their smaller diameter makes them ideal for controlled finishing in areas where 22mm, 25mm or larger discs may feel too aggressive or difficult to position.
They are especially useful for jewellery, dental, restoration and precision engineering work where access, visibility and surface control are critical.
Unlike traditional wire brushes or loose abrasive compounds, the abrasive is built into the flexible bristles. As the disc wears, fresh abrasive is exposed, helping maintain a consistent finish throughout the life of the disc.
Looking for a different size?
Browse the full range of 3M Scotch-Brite Radial Bristle Discs at Moleroda
Why Choose 19mm Discs?
Excellent Access
The compact 19mm diameter allows the disc to reach into tighter areas than larger radial discs.
Better Visibility
The smaller working diameter gives the user more control when working close to delicate features.
Controlled Finishing
Ideal for cleaning, blending and polishing without flattening detail or removing unnecessary base material.
Typical Applications
These discs are typically mounted in multiple layers on MM503 Screw Top Mandrels for application with precision rotary tools such as Micromotors, Pencil Grinders, and Flexible Shaft Machines.
Jewellery & Precious Metals
- Cleaning inside ring settings and galleries
- Removing oxidation and fire scale from detailed castings
- Refining prongs, claws and small decorative features
Watchmaking & restoration
- Cleaning between watch lugs and small case details
- Restoring fine engravings and textured surfaces
- Polishing small components without rounding edges
Dental & Laboratory Work
- Finishing small metal frameworks
- Cleaning complex shapes and confined geometries
- Controlled polishing of intricate components
Precision Engineering
- Micro-deburring small machined parts
- Cleaning threads, holes and internal features
- Surface refinement on small components
Grit Range
These discs are designed to be used within a sequential finishing process:
| Colour | Grade | Typical Use | Availability |
|---|---|---|---|
| Yellow (Coarse) |
80 Grit | Cleaning, oxide removal and initial finishing | In Stock |
| White (Medium) |
120 Grit | General blending and smoothing | Backorder |
| Red (Standard) |
220 Grit | Blending and surface preparation | In Stock |
| Blue (Fine) |
400 Grit | Fine finishing and scratch refinement | In Stock |
| Pink (Fine) |
Pumice / approx. 600 Grit | Pre-polishing | In Stock |
| Peach (Extra-Fine) |
6 Micron | Fine polishing | In Stock |
| Light Green (Ultra-Fine) |
1 Micron | Final high finish | In Stock |
Available grades differ slightly from the Dedeco Sunburst system.
Contact our sales team to discuss specialist grades & availability.
Mounting & Compatibility
These discs have a 1.6mm centre hole and should be used with the MM503 screw-top mandrel.
- Recommended mandrel: MM503 screw-top mandrel
- Compatible shanks: 2.35mm or 3mm, depending on your tool
- Recommended setup: Stack multiple discs for best performance
- Typical stack: 3 – 6 discs
Important: Do not use with MM304 mandrels. The 3mm screw is too large for these 19mm discs.
Compare Small 3M Scotch-Brite Radial Discs
At Moleroda we offer 2 sizes of radial disc designed for mounting on small mandrels:
| Format | Best for |
|---|---|
| 19mm discs | Fine detail work, jewellery, tight access and intricate finishing |
| 25mm discs | Greater surface coverage and faster finishing on larger components |
Looking for larger Scotch-Brite radial discs for heavier-duty applications or 3mm arbor systems?
Explore our full range of Scotch-Brite radial bristle discs.
Need heavier cutting or more aggressive deburring?
Explore the Dedeco Sunburst 7/8″ TC range for higher material removal and specialist profiles.
Operating Guidelines
Recommended speed:
10,000 – 20,000 RPM
Maximum speed:
30,000 RPM
Stacking:
For best results, stack 3 – 6 discs on an MM503 mandrel to create a wider, more stable abrasive face.
Orientation:
Ensure the bristle direction follows the rotation of the tool.
Technique:
Use light pressure and allow the tips of the bristles to do the work. Excessive pressure can reduce disc life and produce less consistent results.
Complete Your Finishing Process
The Right Mounting
These 19mm discs require an MM503 screw-top mandrel. Choose the 2.35mm shank for micromotors and jewellery handpieces, or the 3mm shank for compatible rotary tools and flexible shaft systems.
Mandrels for Radial Discs
MM503 Screw-Top Mandrel – 1.6mm Arbor for Small Radial Discs & Polishing Wheels
Need a Larger Working Face?
Move up to 25mm Scotch-Brite radial discs for broader coverage and faster finishing on larger surfaces.
Note: 25mm discs use a 3mm centre hole and require an MM304 mandrel or compatible mounting system.
3M Scotch-Brite Radial Bristle Discs
Need Specialist Detail Access?
For deeper grooves and ultra-targeted edge access, consider 7/8″ Dedeco Sunburst TC Knife-Edge discs.
Abrasive Wheels
7/8″ (22mm) Dedeco Sunburst TC Radial Bristle Discs – Knife-Edge
