Norton 66253043655 Surface Grinding Wheel 8in 46 Grit

Product Description

The NORTON 66253043655 is a Type 1 straight surface grinding wheel designed for precision stock removal on ferrous metals. Built around an aluminum oxide abrasive grain bonded with a vitrified bond, this wheel delivers consistent cutting action and open pore structure that resists loading during aggressive grinding passes. It measures 8 inches in diameter, 3/4 inches thick, and carries a 1-1/4 inches arbor hole. The 46-grit, J hardness (medium) rating makes it well suited to coarse material removal while maintaining controlled wheel breakdown across extended use cycles. Rated at a maximum of 3600 RPM, it is appropriate for professional shop environments where surface finish and dimensional control are both required.

This wheel is suited for surface grinding, cylindrical grinding, and use on CNC cutting tool machines. The 32A Series specification targets hard carbon steels, soft carbon steels, and tool steels, making it a practical choice for tool-and-die shops, maintenance machine shops, and production grinding operations that regularly work with ferrous stock. The coarse grit grade makes it most appropriate for roughing passes and heavy stock removal rather than finish grinding.

Key Features

• Type 1 straight wheel profile — no recess, no taper, fits standard surface and cylindrical grinder spindles
• Aluminum oxide abrasive grain with vitrified bond for durable, consistent cutting performance
• Porous structure reduces loading when grinding soft carbon steels and similar materials
• J hardness (medium) grade balances wheel wear rate with cutting efficiency across a range of ferrous workpieces
• 32AA46-JVTR specification for straightforward replacement sourcing and grinding wheel dressing reference
• Maximum 3600 RPM rating — compatible with standard surface grinder spindle speeds for this wheel diameter

Compatibility

Rated for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Material application includes hard carbon steels, soft carbon steels, and tool steels as stated by the manufacturer.

Installation Notes

Grinding wheel mounting must be performed by a qualified machinist or grinding machine operator following ANSI B11.9 and OSHA 29 CFR 1910.215 guarding requirements. Before mounting, inspect the wheel for cracks using a ring test — do not mount a wheel that produces a dull or flat tone. Power down and lock out the machine before changing wheels, confirm the arbor hole fits the spindle without forcing, and always use proper flanges and a blotter between the flange and wheel face. After mounting, run the wheel at operating speed with the guard in place for at least one minute before bringing it into contact with the workpiece.