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Brown 3M 361F quick-change sanding discs, 2 inch, pack of 50

3M

3M 22399 361F Quick Change Disc 2in 50G TR PK50

SKU CH-TTSZ-QAMY2 MPN 22399

Quick-change aluminium-oxide sanding disc, 2 in, 50 grit, TR attachment, 25 000 RPM max, pack of 50

  • TypeSanders
  • Color/FinishBrown
  • Quick-change TR system speeds disc swaps
  • Aluminum oxide grain cuts coarse material fast
  • 25,000 RPM max speed handles aggressive sanding
  • Polyester YF backing resists heat buildup
  • Pack of 50 discs keeps work moving

Quick-Change Sanding Disc

The 3M 22399 is a coated abrasive disc built for quick-change sanders in metalworking and surface preparation. It uses aluminum oxide grain on a polyester YF-weight backing for aggressive stock removal on steel and alloys.

25000 RPM Operating Limit

The TR quick-change system locks the disc securely for speeds up to 25,000 RPM on compatible right-angle tools. The closed-coat construction loads quickly on soft materials, so it suits hard metal rather than wood or plastic.

Pack of 50 Discs

Each two-inch brown disc resists heat buildup during extended grinding sessions. The TR mounting requires a matching TR-style holder, making the pack unsuitable for users with Type R or proprietary quick-change systems.

Highlights

  • Quick-change TR system speeds disc swaps
  • Aluminum oxide grain cuts coarse material fast
  • 25,000 RPM max speed handles aggressive sanding
  • Polyester YF backing resists heat buildup
  • Pack of 50 discs keeps work moving

Specifications

TypeSanders
Brand3M
Model22399
Color/FinishBrown

Questions about this item

Should I choose the 50-grit TR discs in the 50-count pack or a finer grit for stock removal?

The 50-grit aluminium-oxide discs are rated coarse and designed for aggressive stock removal; switch to a finer grit only when you need a smoother finish.

What does the 25,000 RPM maximum speed mean when the disc is on my sander?

It is the highest safe spindle speed; run the tool at or below 25,000 RPM to avoid disc failure and maintain cutting performance.

How does the TR quick-change system affect disc swaps and compatibility?

The TR (Type R) roll-on/roll-off design lets you twist discs on and off in seconds, but it only fits TR-compatible backup pads.

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