3M 7000120745 Finishing Flap Brush 8x4x3 Fine Aluminum Oxide

Product Description

The 3M 7000120745 is a finishing flap brush designed for light-duty cleaning and finishing applications across metal fabrication, maintenance, and surface preparation work. Individual abrasive sheets are adhered at a 90-degree angle to a central core, creating a flexible but controlled cutting action. The brush uses a fine-grade aluminum oxide abrasive mineral paired with a hard density (7A) construction, which delivers extended service life while keeping conformability low. At 8 inches in diameter, 4 inches in face width, and 3 inches in arbor hole size, this brush fits standard bench grinder and pedestal grinder spindle setups used by machinists, fabricators, and maintenance technicians.

This flap brush is suited for finishing and light cleaning on metal surfaces where consistent scratch pattern and surface uniformity matter. The 7A density and fine aluminum oxide mineral make it appropriate for final-stage finishing passes rather than aggressive stock removal. Typical applications include deburring, blending weld seams, cleaning oxidized surfaces, and preparing metal for coating or inspection. It is sold as an individual unit and is sized for use on standard grinder arbors found in industrial and trade shop environments.

Key Features

• Fine-grade aluminum oxide abrasive mineral for consistent finishing performance
• Hard 7A density construction for extended brush life and low conformability
• Individual abrasive sheets mounted at 90 degrees to the core for controlled surface contact
• Sized at 8 inches x 4 inches x 3 inches for compatibility with standard grinder arbors
• Light-duty rating suited for cleaning and final finishing rather than aggressive material removal

Compatibility

Designed as an OEM-style replacement flap brush for use on standard bench grinders and pedestal grinders accepting a 3-inch arbor bore.

Installation Notes

Installation should be performed by a qualified technician familiar with bench or pedestal grinder safety procedures. Always power down and de-energize the grinder completely before mounting or removing any abrasive accessory. Verify that the grinder spindle speed rating meets or exceeds the maximum RPM rating of the brush before operation. Inspect the flap brush for damage before each use and never operate a damaged or unbalanced abrasive tool.

Technical Specifications

• Abrasive Mineral: Fine grade aluminum oxide
• Density: 7A (Hard)
• Grade: Fine
• Dimensions: 8 inches x 4 inches x 3 inches
• Weight: 2.5 pounds
• Unit of Measure: Each
• UPC: 00048011157856

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000120745