Norton 666233-53314 Aluminum Oxide Fiber Disc 120 Grit

Product Description

The NORTON 666233-53314 is an aluminum oxide fiber disc designed for aggressive material removal on metal, weld seams, and hard surfaces. Sold in a 25-unit pack, this 4.5-inch disc with a 7/8-inch arbor hole fits standard angle grinders used in fabrication, maintenance, and trade work. The 120-grit aluminum oxide abrasive delivers consistent scratch patterns suited for finishing and blending passes. Fiber discs of this type are a go-to consumable for HVAC sheet metal work, pipe prep, structural steel fabrication, and general metalworking where a resin-fiber backing is needed to handle heat and pressure without breaking down.

This disc is used across residential and commercial trade applications wherever an angle grinder is part of the workflow. Common scenarios include weld blending on ductwork flanges, surface prep before coating or painting, and rust removal on structural components. The 120-grit designation places it in the finishing range, making it appropriate after coarser stock-removal passes. The 25-pack quantity suits shop use or service contractors who go through consumables at volume.

Key Features

• 120-grit aluminum oxide abrasive for controlled finishing and blending on metal surfaces
• 4.5-inch diameter fits standard angle grinders commonly used in HVAC, plumbing, and fabrication trades
• 7/8-inch arbor hole for direct mount on angle grinder spindles
• Fiber backing handles the heat and flex demands of grinding and blending applications
• Sold in a 25-unit pack for shop and field use

Compatibility

Designed as an OEM-style replacement fiber disc compatible with standard 4.5-inch angle grinders accepting a 7/8-inch arbor. Confirm tool RPM rating meets or exceeds the disc rating before use.

Installation Notes

Fiber discs are installed and replaced by the operator — no licensed trade credential is required, but proper grinder guarding and PPE are mandatory per OSHA and tool manufacturer guidelines. Always power down and disconnect the grinder before mounting or removing a disc. Inspect the disc for damage before each use and never exceed the tool or disc maximum RPM rating. A fiber disc backing pad appropriate for the disc diameter is required for correct support and safe operation.

Technical Specifications

• Abrasive Material: Aluminum Oxide
• Disc Diameter: 4.5 inches
• Arbor Hole Size: 7/8 inches
• Grit: 120
• Pack Quantity: 25 discs
• Unit of Measure: Each

Standard Information

• Brand: NORTON
• Manufacturer Part Number: 666233-53314