Tru-maxx 66253255891 Surface Grinding Wheel 46 Grit

Product Description

The TRU-MAXX 66253255891 is a Type 1 surface grinding wheel designed for precision stock removal and surface finishing on ferrous and non-ferrous metals. Built with aluminum oxide abrasive and a vitrified bond, it delivers consistent cut rates and good wheel breakdown under load. The wheel measures 7 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole. Rated at a maximum of 3600 RPM, it carries a J hardness code and a grain structure of 6, placing it in the medium-hardness, semi-friable category. Grinding technicians, tool-and-die workers, and maintenance machinists are the primary users of this wheel.

This wheel is suited for bench grinder and surface grinder applications where a coarse, open cut is needed to remove material efficiently. The 46-grit aluminum oxide construction handles general-purpose surface grinding on steel, cast iron, and similar hard metals. The vitrified bond provides rigidity and porosity control, making it appropriate for wet or dry grinding operations where dimensional accuracy and surface finish are the objective. It is a non-recessed, non-porous Type 1 straight wheel intended for horizontal or vertical spindle surface grinders.

Key Features

• Aluminum oxide abrasive grain — well-suited for ferrous metals and tool steel
• Vitrified bond construction provides rigidity and consistent form holding
• 46 grit, coarse grade for efficient stock removal
• J hardness (medium) with semi-friable grain for self-sharpening action
• Type 1 straight wheel profile with no recess — direct arbor mount
• Maximum operating speed of 3600 RPM

Compatibility

Designed as an OEM-style replacement or standard fitment for bench grinders and surface grinders accepting a Type 1 straight wheel with a 1-1/4 inch arbor hole and a 7-inch diameter.

Installation Notes

Wheel mounting should be performed by a qualified machinist or grinding technician following ANSI B11.9 and OSHA 1910.215 guarding requirements. Always inspect the wheel for cracks or chips using the ring test before mounting, and never exceed the 3600 RPM maximum rated speed. Power down and lock out the grinder before changing wheels. Use proper flanges and blotters as specified by the grinder manufacturer, and allow the wheel to run at operating speed in a guarded condition for at least one minute before applying work.