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

3M

3M 11418 361F Quick Change Disc 3in P240 PK50

SKU CH-EEHP-8TAEK MPN 11418

Quick-change aluminum oxide sanding disc, 3 in, P240 grit, 18,000 RPM max, pack of 50

  • Product typeSanders
  • Quick-change TR system speeds disc swaps
  • Aluminium oxide grain cuts consistently at P240
  • XF-weight polyester backing resists heat up to 18 000 RPM
  • Very-fine grade leaves smooth surface ready for finish
  • Pack of 50 discs keeps production running

What this pack contains

The 3M 361F Quick Change Disc pack supplies fifty 3-inch aluminium-oxide discs rated P240 for fine finishing work. They suit automotive refinishing, metal fabrication and general workshop sanding where a consistent very-fine cut is required. The TR quick-change fitting lets operators swap media in seconds without tools.

Installation and common issues

Each disc snaps onto a compatible TR backup pad rated for at least 18 000 RPM; simply align the lugs and twist to lock. Running above the stated maximum speed or using a worn pad causes vibration, premature grain shedding and edge tear-out. Over-pressure on the workpiece also loads the closed-coat surface rapidly, reducing cut life.

Compatibility checks before ordering

Verify that your random-orbital or rotary sander accepts 3-inch TR-style discs and is rated for 18 000 RPM or higher. Confirm the backup pad diameter matches the 3-inch disc size and that the machine’s spindle thread suits the TR adapter. The polyester XF backing resists heat, so coolant is optional but not required for most metals.

How it compares

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

Price $77.99
Pricier than about 80% of the 477 comparable items (median $21.99).

Specifications

Product
Brand name3M
Model name11418
Product typeSanders

Questions about this item

How can I verify the 3M 11418 disc is running correctly after mounting it on my tool?

The disc should spin smoothly up to the rated 18,000 RPM without vibration. A consistent cut and even wear across the 3 in aluminum-oxide surface confirm proper operation.

What does the PK50 pack contain and is a backup pad required separately?

The box holds 50 green 361F quick-change discs with TR attachment. A compatible TR-style backup pad is not included and must be purchased separately.

Which grit should I choose between the listed grades for fine finishing work?

This model is P240 very-fine grade. Select it when you need a smooth surface preparation step before painting or clear-coating.

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