Tru-maxx 66253292505 Surface Grinding Wheel 120 Grit

Product Description

The TRU-MAXX 66253292505 is a Type 1 surface grinding wheel designed for precision surface grinding applications in metalworking and fabrication environments. Built with aluminum oxide abrasive and a vitrified bond, this wheel delivers consistent stock removal on ferrous metals. It carries a 120 grit rating for fine finishing work and an H hardness code, placing it in the soft hardness range — a common choice when grinding harder workpiece materials. The semi-friable grain structure allows the wheel to self-sharpen during use, maintaining cutting efficiency across the wheel face. Licensed machinists and tool-and-die technicians are the primary installers and operators of this wheel on surface grinders.

This grinding wheel suits horizontal and vertical spindle surface grinders used in job shops, toolrooms, and production machining environments. The Type 1 straight wheel profile fits standard surface grinder spindle arbors. At 120 grit, it is well suited for finish grinding passes where tight flatness and surface finish tolerances are required. The pink aluminum oxide grain and vitrified bond combination is widely used on hardened steel, tool steel, and similar ferrous materials where controlled cut rate and consistent finish are priorities.

Key Features

• 120 grit aluminum oxide abrasive for fine surface finishing on ferrous metals
• Vitrified bond provides rigidity and consistent form-holding during surface grinding
• H hardness code (soft rating) promotes self-sharpening action on harder workpiece materials
• Semi-friable grain structure helps maintain sharp cutting edges throughout wheel life
• Non-porous, non-recessed Type 1 straight wheel profile for standard surface grinder spindles
• 3600 RPM maximum operating speed

Compatibility

Designed as an OEM-style replacement or direct-fit grinding wheel for standard surface grinders accepting a 1-1/4 inch arbor bore Type 1 straight wheel.

Installation Notes

Grinding wheels must be mounted, dressed, and operated by qualified personnel following ANSI B11.9 and OSHA 1910.215 standards for abrasive wheel machinery. Before mounting, inspect the wheel for cracks or chips using the ring test and verify the machine spindle speed does not exceed the 3600 RPM rating marked on the wheel. Power down and lock out the grinder before changing wheels. Always install appropriate flanges and blotters as required and allow the wheel to run at operating speed in a guarded condition before engaging the workpiece.