Tru-maxx 66253255681 Surface Grinding Wheel 7in 100 Grit

Product Description

The TRU-MAXX 66253255681 is a Type 1 surface grinding wheel designed for precision stock removal and surface finishing on ferrous metals and similar materials. Built with aluminum oxide abrasive and a vitrified bond, it delivers consistent cut rates and wheel integrity under sustained grinding loads. The wheel measures 7 inches in diameter, 1/2 inch thick, with a 1-1/4 inch arbor hole, and carries a 100 grit, H hardness (fine grade) designation. It is rated to a maximum of 3600 RPM. Machinists, tool grinders, and surface grinder operators install this wheel on compatible bench and surface grinding machines.

This wheel is suited for surface grinding operations in machine shops, maintenance facilities, and production environments. The aluminum oxide grain with a semi-friable structure makes it effective on hardened steels, tool steels, and general-purpose ferrous workpieces. The vitrified bond provides rigidity and porosity control, supporting flat and form grinding passes where dimensional accuracy matters. It is a non-recessed, non-tapered Type 1 straight wheel appropriate for horizontal-spindle surface grinders.

Key Features

• Aluminum oxide abrasive with semi-friable grain structure for consistent stock removal on ferrous metals
• Vitrified bond construction for rigidity and resistance to oils and coolants during wet or dry grinding
• 100 grit, fine grade, H hardness for controlled material removal with a smooth surface finish
• Type 1 straight wheel profile with no recess and no taper for standard spindle mounting
• Pink wheel color indicates aluminum oxide grain chemistry typical of precision grinding applications
• 3600 RPM maximum speed rating — do not exceed this value during operation

Compatibility

Designed as a standard Type 1 replacement grinding wheel for horizontal-spindle surface grinders and bench grinders accepting a 7 inch diameter wheel with a 1-1/4 inch arbor hole.

Installation Notes

Installation should be performed by a qualified machinist or grinding machine operator following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Before mounting, inspect the wheel for cracks or chips using the ring test — a damaged wheel must not be used. Power down and lock out the grinder before changing wheels, and confirm the machine spindle speed does not exceed the 3600 RPM maximum rating stamped on the wheel. Use proper flanges and a blotter gasket on each side of the wheel and run the machine under guard for at least one minute before presenting work.