Norton 66253043752 Surface Grinding Wheel 8in 46 Grit

Product Description

The NORTON 66253043752 is a Type 1 surface grinding wheel designed for precision stock removal on ferrous metals and high-performance alloys. It measures 8 inches in diameter, 1/2 inch thick, and features a 1-1/4 inch arbor hole. The abrasive is aluminum oxide bonded in a vitrified matrix, graded at 46 grit with a J hardness code — a coarse, medium-hardness specification suited to aggressive material removal while maintaining wheel integrity. It is rated to a maximum of 3600 RPM. The 38A series designation identifies this as a semi-friable white aluminum oxide wheel, a choice for grinding soft carbon steels, tool steels, and superalloys where thermal damage must be controlled.

This wheel is used in surface grinding, cylindrical grinding, and CNC cutting tool machine applications. It is suited to both production and tool-room environments where consistent material removal rates and surface finish are required. Typical applications include grinding flat surfaces on soft carbon steels, hardened tool steels, and superalloy workpieces. The vitrified bond provides rigidity and porosity that supports cool cutting action during extended passes. This wheel is appropriate for professional machinists, tool grinders, and maintenance technicians working with precision grinding equipment.

Key Features

• Type 1 straight wheel profile — no recess, no taper, direct mounting to standard surface grinder spindles
• 38A semi-friable white aluminum oxide abrasive — controlled breakdown that exposes fresh cutting edges and reduces heat buildup
• Vitrified bond — rigid, thermally stable, supports precise dressing and consistent form retention
• 46 grit, J hardness (coarse grade, medium hardness) — efficient material removal on a range of ferrous and superalloy workpieces
• Rated to 3600 RPM maximum — verify spindle speed before mounting
• Non-porous, white wheel color — easy visual inspection for glazing and loading

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Stated material applications include soft carbon steels, tool steels, and superalloys. Fits spindles with a 1-1/4 inch arbor bore.

Installation Notes

Grinding wheel installation must be performed by a qualified machinist or maintenance technician following ANSI B11.9 and OSHA 1910.215 requirements. Power down and lock out the machine before mounting. Perform a ring test on the wheel prior to installation to check for cracks, and use proper blotter flanges on both sides of the wheel. Never exceed the 3600 RPM maximum speed rating marked on the wheel or its packaging.