Tru-maxx 66253255810 Surface Grinding Wheel 12in 46 Grit

Product Description

The TRU-MAXX 66253255810 is a Type 1 surface grinding wheel engineered for precision stock removal and surface finishing on ferrous and non-ferrous materials. Built with aluminum oxide abrasive grain and a vitrified bond, this wheel delivers consistent cutting action and structural rigidity under load. It measures 12 inches in diameter, 1-1/2 inches thick, with a 5-inch arbor hole, and carries an H hardness rating with a coarse 46-grit designation. Rated to a maximum of 2070 RPM, it is suited for surface grinders operated by machinists, tool-and-die makers, and metalworking professionals.

This wheel is designed for use on horizontal-spindle surface grinders in job shop, manufacturing, and maintenance environments. The aluminum oxide grain is semi-friable, meaning it fractures under cutting pressure to expose fresh abrasive and extend wheel life. The vitrified bond provides a rigid, porous-free structure that holds form well during flat-surface grinding passes. Typical applications include precision surface grinding of steel, cast iron, and tool steel workpieces in production or maintenance machining operations.

Key Features

• Type 1 straight-wheel profile for horizontal-spindle surface grinders
• Aluminum oxide abrasive with semi-friable grain for consistent self-sharpening action
• Vitrified bond provides rigid structure and dimensional stability during grinding passes
• 46 grit coarse grade suited for aggressive stock removal applications
• H hardness (soft rating) allows grain to release before glazing, maintaining cut efficiency
• No-recess design with 5-inch arbor hole fits standard surface grinder spindle flanges

Compatibility

Designed as an OEM-style replacement or standard-stocking grinding wheel for horizontal-spindle surface grinders accepting a 12-inch diameter, 5-inch arbor hole, Type 1 straight wheel.

Installation Notes

Grinding wheels must be mounted and dressed by qualified personnel following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Always ring-test the wheel before mounting and confirm the grinder spindle speed does not exceed the 2070 RPM maximum rating stamped on the wheel. Power down and lock out the grinder before changing wheels. Use proper flanges and a compressible blotter on each side of the wheel during mounting; never over-tighten the spindle nut.