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Black 3-inch quick-change sanding discs, pack of 50

3M

3M 7000045090 Quick-Change Sand Disc 3 in 24 Grit PK50

SKU CH-0TQM-H90WM

3-inch aluminium-oxide sanding disc with TR quick-change attachment, 24 grit for aggressive stock removal, rated to 20,000 RPM, pack of 50

  • Extra-coarse 24 grit removes material fast
  • 3-inch TR quick-change fits compatible tools
  • 20,000 RPM max speed handles aggressive use
  • Heat-resistant aluminum oxide stays sharp longer
  • Pack of 50 discs keeps work flowing

Quick-Change Sanding Discs for Metalwork

These 3M Quick-Change Sanding Discs use aluminum oxide abrasive on a polyester backing rated YF weight. The TR quick-change system lets operators swap discs in seconds on compatible die grinders or rotary tools. Packaged in a 50-count box, they suit workshops that need consistent stock removal on steel, iron or weld seams. The extra-coarse 24 grit targets aggressive material removal rather than finishing passes.

Heat-Resistant Design for Continuous Use

Closed-coat coverage and heat-resistant properties help the discs withstand friction at speeds up to 20,000 RPM. The polyester backing resists loading and tearing during prolonged grinding cycles, keeping cut rates steadier than open-coat alternatives. Operators should still follow tool speed limits and use appropriate guarding to manage heat buildup in the workpiece.

TR Quick-Change Mounting and 50-Pack Economy

The TR attachment locks onto matching back-up pads with a simple twist, reducing change-over time between grits or worn discs. A 50-disc pack supports high-volume production runs without frequent reordering. Buyers who need finer surface preparation or contour sanding on complex shapes should select higher-grit discs in the same 361F series.

How it compares

Measured against everything we stock in Sanders, Rotary & Demolition Tools, at today’s prices. Recalculated every night.

Price $83.99
Pricier than about 81% of the 477 comparable items (median $21.99).

Specifications

Product
Brand name3M

Questions about this item

How do I attach the 3 in TR quick-change disc to my tool, and what step causes it to loosen?

Align the TR locking lugs with the holder slots, press firmly, then twist until the audible click; the step most people skip is the final quarter-turn that seats the lugs fully, so the disc can release under vibration.

When will the 24-grit aluminum-oxide surface need replacement?

Replace the disc once the black cutting face glazes over or the polyester YF backing frays at the edge; with closed-coat coverage the grit wears evenly, so loss of bite is the clear signal.

What is the first limit reached during extended sanding at full speed?

The 20,000 RPM ceiling is the hard limit; exceeding it risks disc disintegration, while heat resistance only delays thermal breakdown of the resin bond.

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