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Black 3M 18358 hook-and-loop surface conditioning disc, 7 inch diameter

3M

3M 18358 Hook-and-Loop Surface Conditioning Disc

SKU CH-E6AD-4RW2Q MPN 18358

Hook-and-loop surface conditioning disc with extra-coarse silicon carbide abrasive for aggressive material removal

  • TypeSanders
  • Hook-and-loop backing enables fast disc changes
  • Silicon carbide abrasive cuts aggressively on tough surfaces
  • Extra-coarse grade removes heavy oxidation and coatings quickly
  • Non-woven construction resists loading during extended use
  • Seven-inch diameter fits standard backing pads

What the disc is and who uses it

The 3M 18358 is a hook-and-loop surface conditioning disc built for power sanders. It targets metal-fabrication shops and automotive refinishers who need aggressive material removal on steel, aluminium or composite panels. The extra-coarse silicon carbide abrasive cuts fast on welds, scale and heavy oxidation. It is not for woodworkers seeking a fine finish or for detail sanding in tight corners.

Capacity and headroom

The 7-inch diameter gives broad contact area for flattening large surfaces and stripping coatings quickly. Extra-coarse grade removes stock rapidly on flat or mildly contoured parts. The non-vacuum design means dust extraction relies on ambient collection, so the disc loads faster in high-volume work. It runs out of effective life when the non-woven web glazes or tears on sharp edges.

Practical limits of the hook-and-loop interface

The hook-and-loop backing allows quick disc changes on compatible backup pads, but the bond weakens if the pad surface is contaminated with oil or compound residue. Heat from sustained heavy pressure can degrade the loop engagement, causing the disc to shift or fly off. The non-vacuum format also limits use on sanders that require through-pad dust extraction for shop compliance.

Highlights

  • Hook-and-loop backing enables fast disc changes
  • Silicon carbide abrasive cuts aggressively on tough surfaces
  • Extra-coarse grade removes heavy oxidation and coatings quickly
  • Non-woven construction resists loading during extended use
  • Seven-inch diameter fits standard backing pads

Specifications

TypeSanders
Brand3M
Model18358

Questions about this item

Will the 18358 disc fit the 7-inch backing pad I already use on my random-orbit sander?

Yes, the 18358 is a 7-inch hook-and-loop disc designed to attach directly to a compatible 7-inch backing pad with a matching hook surface.

How can I confirm the 18358 disc is cutting properly once installed?

The black silicon-carbide non-woven face should produce a consistent, uniform scratch pattern without loading; if the surface clogs or the cut feels uneven, the disc may be worn or the sander speed may need adjustment.

Does the 18358 pack include a backing pad or mounting hardware?

No, the 18358 is sold as the hook-and-loop conditioning disc only; a compatible 7-inch backing pad and any required retention hardware must be purchased separately.

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