Tru-maxx 66253292502 Surface Grinding Wheel 12in 46 Grit

Product Description

The TRU-MAXX 66253292502 is a Type 1 surface grinding wheel designed for precision flat grinding operations on ferrous metals and hardened steels. Built with aluminum oxide abrasive and a vitrified bond, this wheel delivers consistent stock removal and a controlled finish across the full face of the wheel. At 12 inches in diameter and 1-1/2 inches thick, with a 5-inch arbor hole, it fits standard surface grinder spindle configurations. The 46 grit coarse grade makes it suited for aggressive material removal. Rated at a maximum of 2705 RPM, the wheel operates safely within the speed range of most industrial surface grinders. At 13 pounds, mounting and balancing are straightforward for experienced machine operators.

This wheel is used in machine shops and industrial maintenance environments where flat surface grinding is required. Typical applications include squaring workpiece faces, removing scale or surface defects, and finishing tool steel or hardened components. The white aluminum oxide grain is semi-friable, meaning it fractures under load to expose fresh cutting edges, which helps maintain cut rate and reduces heat buildup during extended grinding passes. It is installed and used by machinists and tool-and-die professionals working on horizontal spindle surface grinders.

Key Features

• Type 1 flat wheel profile — no recess, full-face grinding contact
• Aluminum oxide abrasive with vitrified bond for rigid, consistent wheel structure
• 46 grit coarse grade for high stock removal rates
• Semi-friable grain self-sharpens under load to extend wheel life
• I hardness (soft rating) allows the wheel to release dull grains readily, reducing glazing
• Maximum 2705 RPM rating — verify spindle speed before mounting

Compatibility

Designed for use on horizontal spindle surface grinders accepting a Type 1 flat wheel with a 12-inch diameter, 1-1/2-inch face width, and 5-inch arbor hole.

Installation Notes

Installation must be performed by a qualified machinist or grinding operator following ANSI B11.24 and wheel manufacturer safety guidelines. Always ring-test the wheel before mounting and confirm the machine spindle speed does not exceed the 2705 RPM maximum rating marked on the wheel blotter. Power down and lock out the grinder before mounting or removing the wheel. Never exceed the rated RPM, use improper flanges, or force a wheel onto an arbor that does not match the 5-inch hole size.