Norton 66252938877 Surface Grinding Wheel 46 Grit 7 in

Product Description

The NORTON 66252938877 is a Type 1 surface grinding wheel engineered for stock removal and surface finishing on ferrous metals. Built with aluminum oxide abrasive and a vitrified bond, this wheel delivers consistent cut rates and open grain structure suited to production grinding environments. The wheel measures 7 inches in diameter, 1/2 inch thick, with a 1-1/4 inch arbor hole. A 46-grit coarse grade and I hardness rating make it well-matched for aggressive material removal on carbon and tool steels. Maximum operating speed is rated at 3600 RPM. Grinding technicians and tool-and-die professionals typically specify this wheel for flat surface work on manual and CNC surface grinders.

This wheel is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines in industrial and job-shop settings. Typical applications include grinding hard carbon steels, soft carbon steels, and tool steels where a coarse cut rate is required. The vitrified bond provides structural rigidity and allows coolant penetration, making it suitable for wet or dry surface grinding operations. The 32A series designation (32AA46-IVTR) identifies this as a general-purpose aluminum oxide formulation optimized for steel alloys common in toolroom and production environments.

Key Features

• Type 1 straight wheel profile with no recess — standard fitment on most surface grinder spindles
• Aluminum oxide abrasive grain suited to hard and soft carbon steels and tool steels
• Vitrified bond with porous structure for coolant flow and chip clearance during grinding
• 46-grit coarse grade for high stock-removal rate on flat surfaces
• I hardness code (medium) balances wheel wear rate against cutting efficiency on steel
• Rated to 3600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Specified for grinding hard carbon steels, soft carbon steels, and tool steels. Fits spindles accepting a 1-1/4 inch arbor hole.

Installation Notes

Grinding wheel mounting and dressing must be performed by qualified personnel following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Always power down and lock out the grinder before mounting or changing wheels. Inspect the wheel for cracks or chips before installation and perform a ring test; never mount a damaged wheel. Verify that the machine spindle speed does not exceed the wheel's 3600 RPM maximum rating before operation.