3M 7000121890 Non-woven Abrasive Disc 4 Inch 1/4 Inch Arbor

Product Description

The 3M 7000121890 is a non-woven abrasive disc engineered for aggressive cutting action in surface preparation and deburring applications. Built with HP-grade material, this disc is stiffer and more tear-resistant than standard GP non-woven media, making it suitable for demanding metalworking tasks. The aluminum oxide abrasive grain cuts sharp, delivers a consistent scratch pattern, and performs reliably on both ferrous and non-ferrous metals. At 4 inches in diameter with a 1/4 inch arbor, this disc mounts to common right-angle grinders and die grinders used by fabrication and finishing professionals.

This disc is designed for edge deburring, removal of tough surface contaminants, and light material removal in metal fabrication and finishing environments. The open web construction resists loading, reducing debris buildup that can clog the abrasive and shorten disc life. Red discs in this line carry a very fine (VFN) grade aluminum oxide abrasive. Typical applications include weld preparation, burr removal after drilling or cutting, and pre-finishing on steel, aluminum, and other metal substrates in shop or field settings.

Key Features

• HP-grade non-woven material is stiffer and more tear-resistant than GP material for demanding edge deburring and metal removal
• Aluminum oxide abrasive produces a consistent scratch pattern on ferrous and non-ferrous metals
• Pliable open web removes burrs and surface contaminants without gouging the substrate
• Load-resistant open web limits debris buildup to extend disc service life
• Very fine (VFN) grade abrasive in red disc color designation
• 1/4 inch arbor fits standard right-angle grinders and die grinders

Compatibility

Designed for use with right-angle grinders and die grinders accepting a 1/4 inch arbor mount. Suitable for metalworking on ferrous and non-ferrous substrates including steel and aluminum.

Installation Notes

Mounting and use should be performed by personnel familiar with angle grinder safety practices. Ensure the grinder is unplugged or locked out before mounting or removing the disc. Verify the tool RPM rating meets or exceeds the disc RPM rating before operation. Always use appropriate eye protection and follow applicable shop safety guidelines when operating rotary abrasive tools.

Technical Specifications

• Diameter: 4 inches
• Arbor Size: 1/4 inch
• Abrasive Material: Aluminum Oxide
• Abrasive Grade: Very Fine (VFN)
• Disc Construction: Non-Woven HP Material
• Disc Color: Red
• Weight: 2.79 pounds
• Unit of Measure: Each

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000121890