Norton 05539510699 Fiber Disc 9.125 in 60 Grit 25 Pack

Product Description

The NORTON 05539510699 is an aluminum oxide fiber disc designed for aggressive material removal on metal surfaces. Part of the Merit FX370 series, this disc measures 9.125 inches in diameter with a 0.875-inch arbor hole and carries a 60 grit rating, placing it in the coarse range for fast stock removal and surface conditioning. Fiber discs in this class are installed on right-angle grinders and used by metal fabricators, pipefitters, ironworkers, and maintenance technicians who need consistent cut rate and disc durability across heavy grinding applications.

This disc is suited for use on structural steel, weld seam blending, casting cleanup, and general ferrous metal grinding in both shop and field environments. The aluminum oxide abrasive is a workhorse grain for carbon steel and other common metals. At 60 grit, it removes material quickly without leaving an excessively coarse finish, making it appropriate for prep work ahead of welding or coating. Each unit is sold individually but packaged and ordered in minimum quantities of 25, which reflects standard bulk distribution for professional and contractor use.

Key Features

• Aluminum oxide abrasive grain for reliable cut rate on ferrous metals
• 60 grit coarse rating for fast stock removal and weld cleanup
• 9.125-inch diameter with 0.875-inch arbor hole for compatibility with standard right-angle grinders
• Merit FX370 series fiber backing for rigidity and heat resistance during grinding
• Sold in 25-disc pack increments, suited to high-volume professional use

Compatibility

Designed for use with right-angle grinders accepting a 9.125-inch fiber disc with a 0.875-inch arbor hole, typically used with a suitable rubber or plastic backing pad rated for disc grinding applications.

Installation Notes

Fiber discs must be mounted on a correctly sized backing pad rated for the disc diameter and the grinder RPM. Verify that the grinder maximum RPM rating meets or exceeds the disc RPM rating before mounting. Always install and remove discs with the grinder unplugged or the power source locked out. Inspect the disc for cracks, tears, or delamination before each use and discard any damaged disc immediately.

Technical Specifications

• Abrasive Material: Aluminum Oxide
• Series: Merit FX370
• Disc Diameter: 9.125 inches
• Arbor Hole Diameter: 0.875 inches
• Grit: 60 (Coarse)
• Quantity per Pack: 25
• UPC: 05539510699

Standard Information

• Brand: NORTON
• Manufacturer Part Number: 05539510699