Tru-maxx 66253255825 Surface Grinding Wheel 8in 60 Grit

Product Description

The TRU-MAXX 66253255825 is a Type 1 surface grinding wheel designed for precision stock removal on surface grinders in metalworking and tool-and-die applications. Built with aluminum oxide abrasive and a vitrified bond, this wheel delivers consistent cut rates on ferrous metals and general-purpose steel. It measures 8 inches in diameter, 1/2 inch thick, with a 1-1/4 inch arbor hole, and carries a 60-grit, medium-grade specification. The hardness code is I, placing it in the soft-to-medium range, which allows the wheel to release dull abrasive grains and expose fresh cutting edges throughout the grind cycle. Maximum operating speed is 3,600 RPM. Installed by machinists and tool grinders, this wheel suits production and maintenance grinding operations where surface finish and dimensional accuracy are the primary objectives.

This wheel is suited for use on horizontal-spindle surface grinders in light industrial, maintenance, and job-shop environments. The 60-grit cut makes it appropriate for roughing and semi-finishing passes on carbon steel, alloy steel, and similar ferrous workpieces where moderate material removal rates are needed before final finishing. The non-porous, vitrified bond structure provides rigidity and thermal resistance, helping maintain wheel geometry under moderate grinding pressures. The white aluminum oxide grain composition is semi-friable, meaning it fractures under load to self-sharpen, reducing heat buildup at the workpiece contact zone.

Key Features

• Aluminum oxide abrasive grain — semi-friable construction supports consistent self-sharpening during the grind cycle
• Vitrified bond provides rigid wheel structure and good thermal resistance at the grinding interface
• 60 grit, medium grade — suited for roughing and semi-finishing passes on ferrous metals
• Hardness code I — soft-to-medium rating encourages dull grain release to maintain cut efficiency
• Type 1 straight wheel profile with no recess — standard fitment for horizontal-spindle surface grinders
• 3,600 RPM maximum operating speed — verify machine RPM before mounting

Compatibility

Designed as a direct-mount replacement for Type 1 straight surface grinding wheels on horizontal-spindle surface grinders accepting an 8 inch diameter, 1/2 inch wide wheel with a 1-1/4 inch arbor bore.

Installation Notes

Surface grinding wheels must be mounted by a qualified machinist or grinding machine operator following ANSI B11.23 and OSHA 1910.215 guarding requirements. Always perform a ring test before mounting to check for cracks, and confirm the machine spindle speed does not exceed the 3,600 RPM maximum marked on the wheel. Power down and lock out the machine before changing wheels. Never exceed the rated speed, modify the arbor bore, or force the wheel onto the spindle flange.