3M 7000120839 Scotch-brite Scuffing Disc 6 Inch 4000 Rpm

Product Description

The 3M 7000120839 is a Scotch-Brite scuffing disc designed for machine surface preparation ahead of painting, staining, and finishing operations. The disc uses silicon carbide mineral bonded in an open nylon fiber web that cuts aggressively while resisting loading. Rated to 4000 RPM, it attaches to a hook-and-loop backup pad or random orbital sander via hook-type backing. The flexible nylon construction conforms to surface contours without removing material or distorting part geometry, making it a reliable choice for consistent scuff prep in automotive, woodworking, and general fabrication environments.

This disc is suited for light surface preparation tasks including cleaning, scuffing, and deglossing prior to coating application. The open web design prevents debris from clogging the abrasive surface, extending service life across multiple passes. It is a practical replacement for steel wool in situations where rust contamination or fiber splintering would be a concern. Licensed tradespeople and shop technicians working on automotive bodywork, cabinet finishing, and general metal or composite prep will find this disc applicable to daily workflow.

Key Features

• Silicon carbide mineral provides sharp, fast-cutting abrasive action for surface scuffing
• Open nylon fiber web resists loading, keeping the disc cutting cleanly throughout its service life
• Flexible nylon fibers conform to surface irregularities without altering part geometry
• Nylon construction will not splinter or rust, making it a safe alternative to steel wool
• Hook-type backing attaches quickly to hook-and-loop backup disc pads and random orbital sanders
• Rated to 4000 RPM for compatibility with standard pneumatic and electric disc tools

Compatibility

Designed for use with hook-and-loop backup disc pads and random orbital sanders that accept 6-inch diameter scuffing discs. Backup pad sold separately.

Installation Notes

Installation and disc changes should be performed with the tool fully powered down and air supply disconnected or power unplugged. Confirm the tool spindle speed does not exceed the 4000 RPM rating of the disc before operation. Inspect the hook-and-loop backing for wear before each attachment to ensure secure seating during use. Eye protection and appropriate respiratory protection should be worn during abrasive surface preparation operations.

Technical Specifications

• Disc Diameter: 6 inches
• Abrasive Mineral: Silicon Carbide
• Maximum Speed: 4000 RPM
• Backing Type: Hook-and-Loop (Hook)
• Web Material: Nylon Fiber
• Package Weight: 0.39 pounds
• Package Length: 15.24 inches
• Package Width: 6.61 inches
• Package Height: 6.89 inches
• Unit of Measure: Box
• Minimum Order Quantity: 4
• UPC: 30051131074683

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000120839