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Maroon 3M non-woven abrasive disc with unthreaded centre hole

3M

3M 04188 Arbor Mount Sanding Disc 6 in Power

SKU CH-E10D-X425E MPN 04188

Arbor-mount sanding disc with aluminum oxide abrasive, medium grade, six-inch diameter, half-inch unthreaded hole, rated for 4,000 RPM maximum speed

  • TypeSanders
  • 6-inch diameter covers large surfaces quickly
  • Medium-grade aluminum oxide balances cut rate and finish quality
  • Non-woven fiber backing resists loading during extended use
  • 1/2-inch unthreaded arbor fits common bench grinders
  • Rated for 4000 RPM maximum operating speed

6-inch arbor-mount sanding disc

The 3M 04188 is a non-woven abrasive disc built for medium-grade surface preparation. It fits tools with a 1/2-inch unthreaded arbor and uses aluminum oxide grain on a maroon fiber backing. The open-coat design resists loading during extended use.

Suited for finishing and light deburring

Woodworkers and metal fabricators who need consistent satin finishes on flat or contoured parts will find the medium grade effective. It is not intended for heavy stock removal or aggressive grinding where a coated abrasive would cut faster.

Runs at up to 4000 RPM with open-coat headroom

The disc handles blending, cleaning and light rust removal on steel, aluminium and wood without clogging. At higher pressures or on hardened materials the medium grit wears quickly and a coarser product would be required.

Highlights

  • 6-inch diameter covers large surfaces quickly
  • Medium-grade aluminum oxide balances cut rate and finish quality
  • Non-woven fiber backing resists loading during extended use
  • 1/2-inch unthreaded arbor fits common bench grinders
  • Rated for 4000 RPM maximum operating speed

Specifications

TypeSanders
Brand3M
Model04188

Questions about this item

What size unthreaded arbor hole must my sander have to mount this 3M 04188 disc?

The disc uses a 1/2 in unthreaded hole connector, so the sander's arbor must match that diameter exactly.

Will this medium-grade aluminum oxide disc load up quickly when sanding soft woods or paints on my older orbital sander?

The open-coat, non-woven fiber backing resists loading, so it stays effective on soft woods and painted surfaces even at the 4,000 RPM maximum speed.

How can I confirm the disc is running true after I mount it on the arbor?

At start-up the maroon disc should spin without visible wobble or vibration up to the 4,000 RPM limit, indicating a centered fit on the 1/2 in arbor.

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