Norton 66252940897 Surface Grinding Wheel 80 Grit 7in

Product Description

The NORTON 66252940897 is a Type 1 straight surface grinding wheel built for precision stock removal on ferrous and non-ferrous metals. It measures 7 inches in diameter, 1/2 inch thick, with a 1-1/4 inch arbor hole. The abrasive matrix is aluminum oxide bonded in a vitrified bond, rated at medium hardness (J hardness code) and 80 grit for a balance of cut rate and surface finish. The wheel carries a maximum operating speed of 3600 RPM and is gray in color. It is installed and operated by machinists and grinding technicians working with surface grinders, cylindrical grinders, and CNC cutting tool machines.

This wheel is suited for production and maintenance grinding applications in machine shops and tool rooms. It performs on a wide range of workpiece materials including 400 series stainless steel, hard and soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. The 80-grit medium-grade specification makes it appropriate for general-purpose surface grinding where moderate material removal and acceptable surface finish are both required. The porous structure of the wheel promotes chip clearance and coolant flow, reducing heat buildup at the workpiece contact zone.

Key Features

• Aluminum oxide abrasive for durable cutting action on ferrous and non-ferrous metals
• Vitrified bond provides rigidity and consistent performance across the wheel life
• 80 grit, J hardness (medium grade) balances cut rate with surface finish quality
• Porous wheel structure promotes chip clearance and reduces grinding heat
• Type 1 straight profile with no recess, compatible with standard surface and cylindrical grinder spindles
• Maximum operating speed of 3600 RPM

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding 400 series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. Fits spindles accepting a 1-1/4 inch arbor hole.

Installation Notes

Grinding wheel mounting and dressing must be performed by a qualified operator following ANSI B11.9 and OSHA 1910.215 standards for abrasive wheel machinery. Power down and lock out the grinder before mounting or removing the wheel. Inspect the wheel for visible cracks or chips before installation and perform a ring test; never mount a wheel that produces a dull thud. Never exceed the 3600 RPM maximum speed rating marked on the wheel.