Tru-maxx 66253255474 Surface Grinding Wheel 8in 100 Grit

Product Description

The TRU-MAXX 66253255474 is a Type 1 surface grinding wheel designed for precision stock removal and surface finishing on ferrous and non-ferrous metals. Built with aluminum oxide abrasive and a vitrified bond, this wheel delivers consistent cut rates and holds its form well under sustained grinding pressure. At 100 grit with a K hardness rating, it falls in the fine-grade, medium-hardness range — suited for finishing passes where surface quality matters as much as material removal. The semi-friable grain structure allows for self-sharpening behavior under load, extending usable wheel life. Rated to 3600 RPM, it is appropriate for bench grinders and surface grinding machines with compatible spindle speeds and arbor sizes.

This wheel is sized at 8 inches in diameter with a 1/2 inch thickness and a 1-1/4 inch arbor hole, making it a standard fit for bench-top and surface grinding setups common in maintenance, tool-and-die, and machine shop environments. The white aluminum oxide composition makes it well suited for tool steels, high-speed steels, and heat-sensitive alloys where minimizing workpiece burning is a priority. It is installed by machinists, tool grinders, and maintenance technicians performing precision surface work.

Key Features

• Type 1 straight-wheel profile for flat surface and cylindrical grinding applications
• Aluminum oxide abrasive with vitrified bond for rigid, consistent wheel structure
• 100 grit, fine grade for finish grinding and light stock removal
• K hardness (medium) balances wheel life with free-cutting action on tool steels
• Semi-friable grain structure promotes self-sharpening under load
• 3600 RPM maximum speed rating; non-recessed, non-porous construction

Compatibility

Designed as an OEM-style replacement or standard supply wheel for bench grinders and surface grinding machines accepting an 8 inch diameter, 1-1/4 inch arbor hole, Type 1 straight wheel.

Installation Notes

Surface grinding wheels must be installed by qualified personnel following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Always power down and lock out the grinder before mounting or removing a wheel. Perform a ring test before mounting to check for cracks, and use appropriate flange hardware — never exceed the wheel's maximum RPM rating. Eye protection and a machine guard are required during operation.