3M 7000120859 Hook Loop Disc 8 in Aluminum Oxide Medium

Product Description

The 3M 7000120859 is a non-woven hook and loop abrasive disc engineered for surface finishing, blending, and light material removal on metal, wood, and composite surfaces. Measuring 8 inches in diameter, this disc attaches via a hook and loop backing for fast pad changes without tools. The aluminum oxide abrasive runs at a medium grade, making it well suited for intermediate finishing passes where a balance of cut rate and surface quality is required. Rated to 6000 RPM, the disc maintains integrity at typical right-angle and random-orbit grinder speeds. At 0.16 pounds, it adds minimal weight to the work setup. The flexible construction conforms to contoured and irregular workpiece profiles.

This disc is used in metal fabrication shops, automotive body work, HVAC sheet metal finishing, and general mechanical service environments. Technicians reach for it when blending welds, cleaning corroded surfaces, or preparing substrates for coating. The non-woven construction resists loading and clogging, which extends usable disc life compared to coated abrasives on painted or previously treated surfaces. The maroon color is standard for medium-grade non-woven discs and provides a quick visual reference for grade selection on the shop floor.

Key Features

• 8-inch diameter fits standard 8-inch hook and loop backup pads
• Aluminum oxide abrasive at medium grade for balanced cut and finish
• Non-woven construction resists loading on painted, coated, and soft metal surfaces
• Flexible disc body conforms to curved and contoured workpieces
• 6000 RPM maximum rating compatible with common variable-speed grinders and sanders
• Hook and loop attachment enables fast disc swaps without adhesive or wrench

Compatibility

Designed for use with 8-inch hook and loop backup pads on random-orbit sanders, right-angle grinders, and disc sanders that accept hook and loop mounting. No vacuum holes are included, so solid backup pads are the appropriate match.

Installation Notes

Mounting is performed by pressing the disc firmly onto a clean, dry 8-inch hook and loop backup pad until the loop fabric seats fully. Inspect the backup pad for worn hook material before attachment, as degraded hooks reduce disc retention at speed. Confirm the tool is unplugged or the pneumatic line is disconnected before changing discs. Do not exceed the 6000 RPM maximum rating printed on the disc.