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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

  • 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.

Highlights

  • 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

Specifications

TypeSanders
Brand3M
Model11418

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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