Tru-maxx 66253292507 Surface Grinding Wheel 46 Grit 7 in

Product Description

The TRU-MAXX 66253292507 is a Type 5 recessed surface grinding wheel designed for precision stock removal on surface grinders. Built with aluminum oxide abrasive and a vitrified bond, this wheel delivers consistent cut rates and controlled breakdown in demanding grinding applications. It carries a 46 grit rating for coarse-grade material removal and a G hardness code, placing it on the soft end of the hardness scale — a characteristic that promotes continuous grain exposure on harder workpiece materials. The wheel is semi-friable, supporting self-sharpening behavior under load. Rated to 3600 RPM, it is suited for use on standard surface grinding machines found in machine shops and tool rooms.

This grinding wheel is intended for surface grinding operations where a recessed wheel geometry is required. The Type 5 form features a single-side recess measuring 2.75 inches in diameter, which allows clearance for flange mounting on compatible spindle configurations. The porous grain structure, designated 12, promotes coolant flow and chip clearance during wet or dry grinding passes. Machinists, tool and die makers, and maintenance technicians installing or dressing this wheel should verify spindle compatibility with the 1.25-inch arbor hole before mounting.

Key Features

• Type 5 single-side recessed geometry with 2.75-inch recess diameter for flange clearance
• Aluminum oxide abrasive, semi-friable — promotes self-sharpening on harder workpiece materials
• Vitrified bond provides rigidity and form-holding during precision surface grinding
• 46 grit coarse grade for aggressive stock removal
• G hardness (soft rating) supports continuous grain fracture and fresh cutting edges
• Open grain structure (grade 12) aids coolant penetration and swarf evacuation
• Maximum operating speed of 3600 RPM

Compatibility

Designed as an OEM-style replacement or direct-use surface grinding wheel for Type 5 surface grinder spindle configurations accepting a 1.25-inch arbor hole and a 7-inch diameter wheel.

Installation Notes

Installation should be performed by a qualified machinist or grinding equipment operator following the machine manufacturer's mounting procedures. Always power down and lock out the surface grinder before mounting or removing the wheel. Inspect the wheel for cracks or chips before installation — never mount a damaged abrasive wheel. Conduct a ring test per ANSI B7.1 guidelines and perform a no-load run-up at operating speed before applying the wheel to a workpiece.