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Maroon 3-inch non-woven disc with hook-and-loop backing

3M

3M 04124 Hook-and-Loop Surface Conditioning Disc 3 in Medium Aluminum Oxide

SKU CH-453C-6DY47 MPN 04124

Three-inch hook-and-loop surface conditioning disc with medium-grade aluminum oxide abrasive for general finishing tasks

  • Product typeSanders
  • Hook-and-loop backing enables quick disc changes
  • Medium-grade aluminum oxide suits surface preparation tasks
  • Non-woven construction resists loading during use
  • Three-inch diameter fits compact sanding tools
  • Maroon colour identifies medium grade at a glance

3 in Medium Aluminum Oxide Disc

The 3M 04124 is a hook-and-loop surface conditioning disc built for non-woven abrasive work. It fits power sanders that accept a 3-inch diameter pad and uses aluminum oxide grain in a medium grade. The maroon colour identifies the medium grit range for consistent surface preparation.

Non-Vacuum Design for General Sanding

This disc has no vacuum holes, so dust extraction relies on the tool or ambient collection. The non-woven construction resists loading during use, helping maintain cutting action on metal, wood or composite surfaces. Power draw and noise follow the sander itself rather than the disc.

Replaces Worn Medium-Grade Discs

It serves as a direct replacement when an existing medium-grade conditioning disc is consumed or clogged. The upgrade is worthwhile when the current disc no longer provides a uniform finish or when switching from a coarser grade to refine the surface. Not suited for applications requiring vacuum-hole alignment or fine-grade finishing.

How it compares

Measured against everything we stock in Sanders, Rotary & Demolition Tools, at today’s prices. Recalculated every night.

Price $1.99
Cheaper than about 96% of the 477 comparable items (median $21.99).

Specifications

Product
Brand name3M
Model name04124
Product typeSanders

Questions about this item

How do I attach the 3M 04124 disc to my sander, and what is the common mistake?

Press the hook-and-loop face onto a clean 3 in backing pad; the step people skip is removing all dust from the pad first, otherwise the disc releases under vibration.

When will this medium-grade aluminum-oxide disc need replacement?

Replace it once the maroon non-woven surface glazes over or the cutting edges round off, which shows as a drop in material removal and a rise in surface temperature.

What limit appears first during extended sanding with the 04124?

Heat buildup in the non-woven web is the first limit; the load-resistant coating delays clogging, but sustained pressure makes the disc overheat before the abrasive fully wears out.

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