Norton 66252942793 Surface Grinding Wheel 46 Grit 7 in

Product Description

The NORTON 66252942793 is a Type 5 recessed surface grinding wheel designed for precision stock removal on soft carbon steels, tool steels, and super alloys. Built with aluminum oxide abrasive and a vitrified bond, this wheel delivers consistent, controlled cutting action across surface and cylindrical grinding applications. At 46 grit with a K hardness rating and semi-friable grain structure, the wheel self-dresses efficiently and maintains a sharp cutting face throughout its service life. The porous structure promotes coolant flow and reduces heat buildup at the workpiece. Rated to 3600 RPM, it is sized at 7 inches in diameter, 1 inch thick, and carries a 1-1/4 inch arbor hole for secure mounting on compatible spindles.

This wheel is suited for use on surface grinders and cylindrical grinders in production and maintenance shop environments, handling both ferrous and high-performance alloy workpieces. The coarse 46-grit specification makes it appropriate for aggressive material removal passes rather than finish grinding. Its Type 5 geometry features a 3-inch recess diameter and 1/2-inch recess depth on one side, which accommodates specific spindle nose configurations common on surface grinding setups. Typical users include machinist-trade professionals and tool room operators working on ferrous metals and demanding super alloy components.

Key Features

• Aluminum oxide abrasive with vitrified bond for durable, open cutting action
• 46 grit, coarse grade for efficient material removal on soft carbon steels, tool steels, and super alloys
• K hardness (medium) with semi-friable grain structure promotes consistent self-dressing
• Porous wheel structure aids coolant penetration and reduces thermal loading
• Type 5 recessed geometry with 3-inch recess diameter and 1/2-inch recess depth on one side
• Rated to 3600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders and cylindrical grinders. Suited for material applications including soft carbon steels, tool steels, and super alloys as stated by the manufacturer. Series designation 38A Type 5.

Installation Notes

Mounting and dressing of grinding wheels should be performed by qualified personnel in accordance with ANSI B11.9 and applicable shop safety standards. Always inspect the wheel for cracks or chips before mounting and conduct a ring test per wheel manufacturer guidelines. Power down and lock out the grinder before changing wheels. Never exceed the maximum operating speed of 3600 RPM marked on the wheel.