Tru-maxx 66253255909 Surface Grinding Wheel 46 Grit

Product Description

The TRU-MAXX 66253255909 is a Type 1 surface grinding wheel designed for precision flat grinding on surface grinders. Constructed from aluminum oxide abrasive with a vitrified bond, it delivers consistent stock removal on ferrous metals and tool steels. The wheel measures 7 inches in diameter, 0.5 inches thick, with a 1-1/4 inch arbor hole. At 46 grit with an H hardness rating and a grain structure of 6, it is classified as coarse grade and semi-friable, suited for moderate to aggressive material removal. Maximum operating speed is 3600 RPM. The white color indicates aluminum oxide composition, and the non-porous, vitrified bond resists coolant breakdown during wet grinding operations.

This wheel is intended for use on horizontal-spindle surface grinders in tool rooms, maintenance shops, and precision grinding operations. Typical applications include grinding flat surfaces on hardened steel, high-speed steel tooling, and general ferrous workpieces. The coarse 46-grit specification makes it well suited for roughing passes and rapid stock removal before finishing. Machinists and tool grinders performing surface grinding work are the primary installers and operators of this wheel.

Key Features

• Type 1 straight wheel profile for horizontal-spindle surface grinders
• Aluminum oxide abrasive grain, semi-friable for self-dressing action
• Vitrified bond resists coolant and oil during wet grinding
• 46 grit, H hardness (soft), grain structure 6 for balanced cut rate and wheel life
• Non-porous construction reduces loading on ferrous materials
• Rated to 3600 RPM maximum operating speed

Compatibility

Designed as a standard Type 1 replacement grinding wheel for horizontal-spindle surface grinders accepting a 7 inch diameter wheel with a 1-1/4 inch arbor bore.

Installation Notes

Grinding wheel mounting must be performed by a qualified operator following ANSI B11.22 and applicable shop safety standards. Inspect the wheel for cracks or chips using a ring test before mounting. Never exceed the 3600 RPM maximum speed rating stamped on the wheel. Ensure the spindle is fully stopped and the machine is locked out before changing wheels, and use proper blotter flanges sized to the wheel arbor.