3M
3M 4120 SC-DH Hook-and-Loop Surface Conditioning Disc, Coarse, 3 in
Hook-and-loop surface conditioning disc with aluminum-oxide abrasive, coarse grade, 3 in diameter, non-vacuum design
- TypeSanders
- Hook-and-loop attachment enables fast disc changes
- Coarse non-woven abrasive removes material quickly
- Aluminium oxide grain resists loading during use
- Brown colour identifies the coarse grade instantly
- Three-inch diameter fits compatible backing pads
Surface conditioning disc, coarse grade
The 3M 4120 SC-DH is a hook-and-loop surface conditioning disc built for coarse finishing work. It uses aluminum oxide abrasive on a non-woven backing and carries a brown colour code for the coarse grade. The three-inch diameter fits standard hook-and-loop backup pads. No vacuum holes are present on the disc face.
Automotive and metalwork prep, not fine finishing
This disc suits technicians removing rust, paint or heavy oxidation on panels and metal fabricators blending weld seams before coating. The coarse grade cuts quickly but leaves a visible scratch pattern, so it is not intended for final surface preparation or fine blending where a medium or very fine grade would be required.
Three-inch hook-and-loop attachment
The disc mounts on any three-inch hook-and-loop backup pad, allowing quick changeover without adhesives or tools. The non-vacuum design means dust extraction relies on the surrounding workspace rather than the disc itself.
Highlights
- Hook-and-loop attachment enables fast disc changes
- Coarse non-woven abrasive removes material quickly
- Aluminium oxide grain resists loading during use
- Brown colour identifies the coarse grade instantly
- Three-inch diameter fits compatible backing pads
Specifications
| Type | Sanders |
|---|---|
| Brand | 3M |
| Model | 4120 |
Questions about this item
How can I confirm the 4120 disc is working correctly after attaching it to my sander?
The disc should run smoothly without vibration; the coarse aluminum oxide surface will produce a consistent scratch pattern and the brown colour will wear evenly as material is removed.
What comes with the 4120 disc and what must I supply separately?
The package contains only the 3-inch hook-and-loop surface conditioning disc; you must provide a compatible 3-inch hook-and-loop backup pad and a sander that accepts it.
Which grade of the 4120 series should I choose for heavy stock removal?
The coarse grade supplied here is intended for aggressive blending and cleaning; finer grades in the same series are available for lighter finishing work.
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