Norton 66261126558 5 Inch 50 Grit Zirconia Alumina Fiber Disc

Product Description

The NORTON 66261126558 is a 5-inch zirconia alumina fiber disc designed for aggressive material removal on metal, weld seams, and hard surfaces. Part of the F826P series, it runs at a maximum of 13,000 RPM and delivers coarse, 50-grit stock removal with a resinoid bond that resists heat and loading under heavy pressure. The fiber backing provides rigidity and durability through extended grinding passes. The threaded arbor hole features a 5/8-11 center thread for secure, vibration-resistant attachment to compatible back-up pads. Licensed metalworking and fabrication professionals install this disc for surface conditioning, deburring, and weld blending operations.

This disc is suited for industrial and commercial metalworking applications including structural steel fabrication, pipe preparation, and weld clean-up. The coarse 50-grit cut rate makes it appropriate for rapid stock removal rather than finishing passes. It is compatible with Norton AVOS Speed-Lok back-up pads and is sold individually per package. Typical users include ironworkers, welders, pipefitters, and metal fabricators working with angle grinders in shop or field settings.

Key Features

• 50-grit coarse zirconia alumina abrasive for aggressive, fast stock removal
• 5-inch disc diameter with 5/8-11 threaded arbor hole for secure attachment
• Maximum operating speed of 13,000 RPM
• Resinoid bond resists heat buildup and disc loading during extended use
• Fiber backing provides rigidity and structural support under grinding pressure
• Designed for use with Norton AVOS Speed-Lok back-up pads

Compatibility

Designed for use with Norton AVOS Speed-Lok back-up pads. Requires a 5/8-11 threaded arbor back-up pad mounted on a compatible right-angle grinder.

Installation Notes

A licensed or qualified operator should verify the grinder's rated RPM does not exceed the disc maximum of 13,000 RPM before mounting. Power down and disconnect the grinder from its power source before installing or changing the disc. Thread the disc securely onto the back-up pad arbor by hand and confirm it is fully seated before operation. Always follow applicable ANSI B7 grinding wheel safety standards and wear appropriate PPE including face shield and gloves.