3M 7000120920 Unitized Abrasive Wheel 4 in Aluminum Oxide

Product Description

The 3M 7000120920 is a Scotch-Brite EXL unitized abrasive wheel designed for smoothing, deburring, and surface finishing on metal alloys, plastics, and composites. The wheel measures 4 inches in diameter with a 3/8 inch arbor bore and is constructed from aluminum oxide abrasive mineral bonded into a layered, unitized nylon web. The soft, conformable construction keeps the abrasive in continuous contact with irregular or complex part geometries, making it well suited for both manual bench grinding and automated robotic processing. Weighing 0.2 pounds, the wheel is lightweight and easy to handle during setup or changeover.

This wheel is used in metalworking, fabrication, and finishing operations across light industrial and manufacturing environments. Typical applications include edge deburring on cut sheet metal, blending weld seams, surface conditioning prior to coating, and finishing of aluminum, stainless steel, and other metal alloys. It also performs on many plastic and composite substrates without smearing or glazing the surface. The wheel is appropriate for use by machinists, fabricators, and toolroom technicians working with bench grinders or compatible right-angle tools.

Key Features

• Layered unitized construction runs clockwise or counterclockwise without performance loss
• Conformable nylon web keeps abrasive in contact with complex or irregular part shapes
• Aluminum oxide mineral provides consistent cut on metal alloys, plastics, and composites
• Minimizes heat buildup, reducing risk of damage to heat-sensitive base materials
• Resists smearing for cleaner finished surfaces with less prep work between passes
• Wheel edge can be dressed to restore cutting action for deburring and polishing tasks

Compatibility

Designed as an OEM-style replacement or direct-use unitized abrasive wheel for bench grinders and right-angle tools accepting a 3/8 inch arbor with a 4 inch diameter wheel.

Installation Notes

Installation should be performed by a qualified technician familiar with abrasive wheel safety per ANSI B7.1 guidelines. Power down and lock out the grinder or tool before mounting or removing the wheel. Confirm the tool spindle speed rating meets or exceeds the wheel maximum RPM before operation. Inspect the wheel for damage before each use and do not operate a cracked or deformed wheel.

Technical Specifications

• Wheel Diameter: 4 inches
• Arbor Size: 3/8 inches
• Abrasive Mineral: Aluminum Oxide (AO)
• Construction: Unitized layered nylon web
• Weight: 0.2 pounds
• Package Dimensions: 5.7 x 5.7 x 6 inches
• Unit of Measure: Each
• UPC: 00048011185897

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000120920