Norton 66252939544 Surface Grinding Wheel 46 Grit 7in

Product Description

The NORTON 66252939544 is a Type 1 straight surface grinding wheel designed for precision stock removal on ferrous and non-ferrous metals. Built with aluminum oxide abrasive and a vitrified bond, it delivers consistent cut rate and wheel breakdown on hard and soft materials alike. The wheel measures 7 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole, and carries a 46-grit coarse grade with an I hardness code. It is rated to a maximum of 3600 RPM. The 32A specification designation indicates a medium-hardness, porous structure suited to surface and cylindrical grinding operations where coolant retention and free cutting action matter.

This wheel fits surface grinders, cylindrical grinders, and CNC cutting tool machines used in production and tool-room environments. It is suited for grinding 400 series stainless steel, hard and soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. The coarse 46-grit cut makes it appropriate for aggressive material removal passes rather than finish work. It is commonly installed by machinists and tool-and-die professionals working in job shops, maintenance departments, and manufacturing facilities.

Key Features

• Aluminum oxide abrasive provides durable, self-sharpening cutting action on a wide range of metals
• Vitrified bond with porous structure supports coolant flow and reduces heat buildup during grinding
• 46-grit coarse grade suited for high-stock-removal passes on ferrous and non-ferrous workpieces
• I hardness code (medium) balances wheel life against cut rate on steels and cast irons
• Type 1 straight profile fits standard surface grinder and cylindrical grinder spindle setups
• 32A series specification for consistent performance across the 400 series stainless and tool steel applications

Compatibility

Compatible with surface grinders, cylindrical grinders, and CNC cutting tool machines accepting a 7-inch diameter, 1/4-inch thick Type 1 wheel with a 1-1/4 inch arbor hole. Rated for use on 400 series stainless, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron.

Installation Notes

Grinding wheel mounting and dressing must be performed by qualified personnel following ANSI B11.9 and OSHA 29 CFR 1910.215 guarding requirements. Always power down the machine and verify the spindle is fully stopped before removing or mounting a wheel. Inspect the wheel for cracks or chips before installation using the ring test, and never exceed the 3600 RPM maximum speed marked on the wheel. A proper wheel flange, blotter, and arbor nut torque sequence per machine manufacturer specifications are required for safe operation.