Tru-maxx 66253292491 Surface Grinding Wheel 8in 46G

Product Description

The TRU-MAXX 66253292491 is a Type 1 surface grinding wheel designed for precision stock removal on surface grinders. It measures 8 inches in diameter, 1/2 inch thick, with a 1-1/4 inch arbor hole. The wheel uses aluminum oxide abrasive grain bonded with a vitrified bond, producing a porous, open structure that runs cool and resists loading. At 46 grit with a G hardness rating, it falls in the coarse-grade, soft-hardness range — well suited for aggressive material removal on ferrous metals. Rated to 3105 RPM maximum. Licensed machinists, tool-and-die makers, and maintenance technicians are the primary users of this wheel.

This wheel is built for horizontal and vertical spindle surface grinding applications in production and maintenance shop environments. The semi-friable aluminum oxide grain continuously self-sharpens during cutting, making it effective on carbon steel, alloy steel, and similar ferrous workpieces where surface finish and flatness are required. The porous grain structure (structure number 12) and vitrified bond provide good chip clearance and thermal management during extended grinding passes. Typical applications include flat surface finishing, reconditioning of machine ways, and precision stock removal on tool steel components.

Key Features

• Type 1 straight wheel profile — no recess, compatible with standard surface grinder spindle flanges
• 46 grit coarse grade for aggressive material removal with controlled surface finish
• G hardness (soft) vitrified bond promotes self-sharpening and reduces heat buildup
• Semi-friable aluminum oxide abrasive grain suits ferrous metal grinding
• Open grain structure (structure 12) provides chip clearance and cool cutting action
• White wheel color for easy visual identification as aluminum oxide composition

Compatibility

Designed as an OEM-style replacement or standard aftermarket wheel for surface grinders accepting a Type 1 straight wheel with an 8 inch diameter, 1/2 inch face width, and 1-1/4 inch arbor bore running at or below 3105 RPM.

Installation Notes

Grinding wheel mounting must be performed by a qualified machinist or maintenance technician following ANSI B11.9 and OSHA 29 CFR 1910.215 guarding requirements. Before mounting, power down and lock out the grinder per LOTO procedures, inspect the wheel for cracks using the ring test, and verify that the machine spindle speed does not exceed the 3105 RPM maximum marked on the wheel. Use proper flange blotters and never over-tighten the spindle nut. Always dress the wheel with an appropriate diamond dresser before the first grinding pass after installation.