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Maroon 5-inch fiber disc with 7/8-inch center hole, pack of 25

3M

3M 27401 982C Fiber Disc 5 in 36 grit 25pk

SKU CH-TFV4-8P8FJ MPN 27401

5-inch 36-grit ceramic fiber discs for aggressive stock removal at 12,000 RPM, 25 per pack

  • TypeSanders
  • Ceramic abrasive cuts faster and lasts longer
  • 36 grit removes heavy stock quickly
  • 5-inch disc fits standard angle grinders
  • 7/8-inch unthreaded hole mounts without tools
  • Pack of 25 discs keeps the workshop stocked

3M Cubitron II 982C Fiber Discs

These 5-inch ceramic fiber discs use a closed-coat YF backing and come in a 25-pack for high-volume grinding. They fit angle grinders with a 7/8-inch unthreaded arbor and are rated for 12,000 RPM maximum speed. Professional fabricators and metalworkers choose them for aggressive stock removal on steel and other ferrous metals.

Installation and common issues

Slip the unthreaded 7/8-inch hole over the grinder spindle and secure with the tool's standard flange and lock nut — no adapter is required. The most frequent problem is mounting the disc backwards, which tears the fiber backing and ejects debris. Always verify the arrow direction matches spindle rotation before tightening. Exceeding the 12,000 RPM limit also causes rapid disintegration.

Grit 36 extra-coarse rating

Grade 36 is the single specification that determines whether this disc matches the job; it is an extra-coarse grit designed for heavy weld grinding and rapid material removal. It will leave deep scratches unsuitable for finishing or paint preparation. Select a finer grit if the next step requires a smooth surface profile.

Highlights

  • Ceramic abrasive cuts faster and lasts longer
  • 36 grit removes heavy stock quickly
  • 5-inch disc fits standard angle grinders
  • 7/8-inch unthreaded hole mounts without tools
  • Pack of 25 discs keeps the workshop stocked

Specifications

TypeSanders
Brand3M
Model27401

Questions about this item

How can I confirm the 982C fiber disc is running correctly after mounting it on my sander?

The disc should spin smoothly up to 12,000 RPM without vibration, and the maroon ceramic coating will show consistent material removal on the workpiece.

What comes in the 27401 pack and what extra items are needed to use it?

The box contains 25 fiber discs, each 5 in diameter with a 7/8 in unthreaded hole. A compatible backup pad and sander are required separately.

Which 982C disc variant should I choose for heavy stock removal on metal?

Select the 36 grit extra coarse grade with YF weight fiber backing and closed coating coverage for aggressive cutting on metal surfaces.

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