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Brown 1-1/2 inch quick-change sanding discs, pack of 50

3M

3M 51039 Quick Change Disc 1-1/2in P100 PK50

SKU CH-6GRJ-TRC5M MPN 51039

Quick-change sanding disc with aluminum oxide abrasive on polyester backing, P100 grit, 30,000 RPM max speed, pack of 50

  • Product typeSanders
  • Color and finishBrown
  • Quick-change TS system speeds disc swaps
  • Aluminum oxide grain cuts metal and wood efficiently
  • Closed-coat P100 grit leaves a consistent medium finish
  • YF-weight polyester backing resists heat at 30,000 RPM
  • Pack of 50 discs keeps production running

1-1/2 in Quick-Change Sanding Discs

These 3M 51039 discs use aluminum oxide grain on a polyester backing for medium-grade material removal. The closed coating and YF-weight construction resist loading while handling heat during extended sanding sessions. A TS quick-change hub lets operators swap discs without tools. The pack contains 50 pieces for workshop throughput.

Replaces worn P100 discs on right-angle die grinders

Switch to this pack when existing discs lose cut rate or begin glazing on metal, paint or composite surfaces. The 361F series maintains consistent finish quality at speeds up to 30000 RPM. The upgrade is worth it when downtime for disc changes slows production or when heat buildup shortens abrasive life.

Fits TS-compatible quick-change back-up pads

Mount directly on any holder that accepts the TS locking system; no adapters or additional hardware are required. The 1-1/2 in diameter suits detail work and tight contours where larger discs cannot reach. Polyester backing resists tearing, freeing the operator from frequent disc failures during aggressive stock removal.

How it compares

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

Price $35.99
Pricier than about 62% of the 477 comparable items (median $21.99).

Specifications

Product
Brand name3M
Model name51039
Product typeSanders
Color and finishBrown

Questions about this item

What size backing pad does the 1-1/2in disc require?

Use a 1-1/2in quick-change backing pad rated for at least 30,000 RPM with a TS interface.

How do you lock the disc onto the TS quick-change hub without stripping the threads?

Align the disc tabs with the hub slots, push straight in, then twist a quarter-turn until you feel a positive click.

When should the P100 aluminium-oxide discs be replaced during a job?

Replace a disc when the brown abrasive surface dulls, glazes over, or no longer cuts cleanly at 30,000 RPM.

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