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Black 3M hook-and-loop surface conditioning disc, extra coarse grade

3M

3M 18424 Hook-and-Loop Surface Conditioning Disc

SKU CH-K1Q9-TEVAM MPN 18424

A hook-and-loop surface conditioning disc with silicon carbide abrasive in an extra-coarse grade for aggressive material removal

  • TypeSanders
  • Extra-coarse grade removes material quickly
  • Silicon carbide abrasive cuts hard surfaces
  • Hook-and-loop backing allows fast disc changes
  • Non-vacuum design suits dry sanding tasks
  • Black colour identifies extra-coarse grade

What this disc is and who it fits

The 3M 18424 is a hook-and-loop surface conditioning disc built with silicon-carbide abrasive in an extra-coarse grade. It targets metalworkers and automotive technicians who need aggressive material removal on contoured surfaces without loading.

What to check before ordering

Verify that your backing pad accepts a 4-1/2 inch hook-and-loop disc with no vacuum holes. The non-woven construction requires a compatible random-orbital or dual-action sander running at the speed recommended by the tool manufacturer.

Behaviour under sustained load

The load-resistant coating and open non-woven structure shed debris continuously, keeping the cutting action consistent during extended blending or cleaning passes. Silicon-carbide grain stays sharp longer than conventional abrasives, reducing disc changes on high-volume jobs.

Highlights

  • Extra-coarse grade removes material quickly
  • Silicon carbide abrasive cuts hard surfaces
  • Hook-and-loop backing allows fast disc changes
  • Non-vacuum design suits dry sanding tasks
  • Black colour identifies extra-coarse grade

Specifications

TypeSanders
Brand3M
Model18424

Questions about this item

What comes in the box with the 3M 18424 disc, and do I need a separate backing pad?

The box contains the hook-and-loop surface conditioning disc; a compatible hook-and-loop backing pad must be purchased separately for attachment to your sander.

Which grade of the 3M 18424 should I choose for heavy material removal?

This model is only offered in the Extra Coarse grade, designed for aggressive stock removal and surface preparation tasks.

How does the 4-1/2 inch diameter of the 3M 18424 affect its use on a random orbital sander?

The 4-1/2 inch size fits standard random orbital sanders of that diameter, providing full contact area for consistent finishing on flat surfaces.

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