Norton 66252939822 Surface Grinding Wheel 100 Grit

Product Description

The NORTON 66252939822 is a Type 1 surface grinding wheel designed for precision stock removal and finish grinding on metallic workpieces. Built with aluminum oxide abrasive in a vitrified bond, this wheel delivers consistent cutting action across a range of ferrous materials. It measures 7 inches in diameter by 1/4 inch thick with a 1-1/4 inch arbor hole, and is rated for a maximum of 3600 RPM. The H hardness code and fine grade designation make it well suited for applications requiring controlled material removal without excessive heat buildup. Licensed grinding machine operators and tool room technicians are the typical end users.

This wheel is intended for use on surface grinders, cylindrical grinders, and CNC cutting tool machines in both shop and tool room environments. Its aluminum oxide composition and semi-friable structure make it particularly effective on soft carbon steels, tool steels, and super alloys. The 38A Type 1 series specification (38A100-HVBE) identifies this as a white aluminum oxide wheel optimized for grinding materials that are sensitive to heat or require a fine surface finish. It is appropriate for both production and maintenance grinding scenarios.

Key Features

• Aluminum oxide abrasive with semi-friable structure for consistent cutting and self-sharpening action
• Vitrified bond provides rigidity and porosity control for stable grinding performance
• H hardness (soft) rating reduces glazing on hard or heat-sensitive workpiece materials
• Fine grade, 100 grit designation for smooth surface finishes on precision components
• Non-porous, non-tapered Type 1 flat wheel geometry fits standard surface and cylindrical grinder spindles
• Rated to 3600 RPM maximum for safe operation on compatible machines

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Rated for soft carbon steels, tool steels, and super alloys. Fits spindles accepting a 1-1/4 inch arbor hole.

Installation Notes

Installation should be performed by a qualified grinding machine operator following the machine manufacturer's instructions and applicable ANSI B11 safety standards for abrasive wheel use. Always inspect the wheel for cracks or chips before mounting and perform a ring test. Power down and lock out the grinder before changing wheels. Never exceed the 3600 RPM maximum speed rating stamped on the wheel or listed in product documentation.