Tru-maxx 66253255911 Surface Grinding Wheel 46 Grit

Product Description

The TRU-MAXX 66253255911 is a Type 1 surface grinding wheel designed for precision flat grinding on surface grinders. It is constructed from aluminum oxide abrasive with a vitrified bond, giving it the rigidity and porosity needed for consistent stock removal on ferrous metals. At 46 grit with an I hardness rating, this wheel falls in the coarse-grade range, making it suited for aggressive material removal while maintaining reasonable wheel life. The semi-friable grain structure helps the wheel self-dress during use, reducing loading on softer or medium-hardness workpiece materials. It is rated to a maximum of 3600 RPM and weighs 2 pounds.

This wheel is used in horizontal and vertical spindle surface grinding applications common to tool rooms, maintenance shops, and production grinding environments. The 7-inch diameter and 1/2-inch thickness fit standard surface grinder spindles with a 1-1/4-inch arbor bore. Machinists and tool-and-die technicians use this wheel for flat surface finishing, die reconditioning, and general ferrous metal stock removal. The white aluminum oxide composition makes it appropriate for grinding high-speed steel, tool steel, and similar hardened materials where heat control is important.

Key Features

• Type 1 straight wheel profile for surface grinding applications
• Aluminum oxide abrasive with semi-friable grain for controlled self-dressing
• Vitrified bond provides rigidity and consistent cut performance
• 46 grit coarse grade for efficient stock removal
• I hardness rating (soft range) reduces glazing on harder workpiece materials
• Non-porous, no-recess design with grain structure grade 6

Compatibility

Designed as a standard Type 1 replacement surface grinding wheel for horizontal and vertical spindle surface grinders accepting a 7-inch diameter, 1/2-inch wide wheel with a 1-1/4-inch arbor bore running at or below 3600 RPM.

Installation Notes

Surface grinding wheels must be installed by a qualified machinist or grinding equipment operator following ANSI B11.23 and applicable shop safety standards. Before mounting, inspect the wheel for cracks or chips using the ring test. Power down and lock out the grinder before changing wheels, and verify that the machine spindle speed does not exceed the 3600 RPM maximum rating marked on the wheel. Always use proper flange hardware and ensure blotters are in place before tightening the arbor nut.