Tru-maxx 66253255900 Surface Grinding Wheel 80 Grit

Product Description

The TRU-MAXX 66253255900 is a Type 1 surface grinding wheel designed for precision stock removal on ferrous metals and general-purpose bench or surface grinding applications. Built with aluminum oxide abrasive and a vitrified bond, this wheel delivers consistent cut rate and good form retention throughout its service life. It measures 7 inches in diameter, 1/2 inch thick, with a 1-1/4 inch arbor hole. Rated at a maximum of 3,600 RPM, it carries an I hardness code and a grain structure rating of 6, placing it in the medium-soft range for balanced cut aggressiveness and wheel longevity. The white aluminum oxide composition is semi-friable, allowing the wheel to self-sharpen under load.

This wheel is suited for surface grinders and bench grinders used in metalworking shops, tool rooms, and maintenance environments. The 80-grit specification targets medium-finish stock removal where surface finish and dimensional accuracy both matter. It is a non-porous, vitrified-bond wheel with no recess, making it straightforward to mount on standard 1-1/4 inch arbor spindles. Licensed machinists, toolmakers, and maintenance technicians in industrial and production settings are the typical installers and operators of this product.

Key Features

• Type 1 straight wheel profile with no recess for simple, secure mounting
• Aluminum oxide abrasive — semi-friable grain for self-sharpening action under load
• Vitrified bond provides rigid form retention and consistent cut geometry
• 80 grit delivers medium stock removal with a usable surface finish
• I hardness code (soft-to-medium range) balances wheel wear against cut efficiency on harder workpieces
• Rated to 3,600 RPM maximum operating speed

Compatibility

Designed as a direct-fit replacement for Type 1 surface grinding wheels with a 7-inch diameter, 1/2-inch thickness, and 1-1/4-inch arbor hole on standard bench and surface grinders accepting that spindle size.

Installation Notes

Grinding wheel installation must be performed by qualified personnel following ANSI B7.1 safety standards. Always power down and lock out the grinder before mounting or removing any wheel. Conduct a ring test by tapping the wheel gently — a clear tone indicates an intact wheel; a dull thud indicates a crack and the wheel must be discarded. Never exceed the 3,600 RPM maximum speed rating marked on the wheel, and verify the machine spindle speed before operation.