Norton 66252940204 Surface Grinding Wheel 7in 100 Grit

Product Description

The NORTON 66252940204 is a Type 1 surface grinding wheel engineered for precision material removal on ferrous metals and high-strength alloys. Built with a ceramic abrasive grain and a vitrified bond, this wheel delivers consistent cut rates and extended wheel life in demanding grinding applications. It measures 7 inches in diameter, 1/2 inch thick, with a 1-1/4 inch arbor hole. The 100 grit, J hardness (fine grade, medium hardness rating) configuration suits finish and semi-finish grinding passes where surface quality matters. Rated to 3600 RPM, it fits standard surface grinder spindle configurations used in production and tool room environments.

This wheel is suited for use on CNC cutting tool machines, cylindrical grinders, and surface grinders in both production shop and tool room settings. Material compatibility includes 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. It is appropriate for applications requiring consistent stock removal on difficult-to-grind materials where a semi-friable ceramic grain is preferred over conventional aluminum oxide.

Key Features

• Ceramic abrasive grain with vitrified bond for consistent cut and long wheel life
• 100 grit fine grade for finish and semi-finish surface grinding passes
• J hardness code, medium hardness rating, semi-friable grain structure
• Type 1 flat wheel geometry with no recess and no taper
• 3600 RPM maximum rated speed for surface and cylindrical grinder use
• Compatible with a broad range of ferrous and high-alloy workpiece materials

Compatibility

Designed for use with CNC cutting tool machines, cylindrical grinders, and surface grinders. Suitable for grinding 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. Series designation is 5SG Type 1.

Installation Notes

Grinding wheel mounting and dressing should be performed by qualified personnel following ANSI B11.9 and OSHA 29 CFR 1910.215 safety standards. Always inspect the wheel for cracks or chips before mounting and perform a ring test per the wheel manufacturer guidelines. Power down and lock out the grinder before changing wheels. Never exceed the maximum rated RPM of 3600 and ensure the arbor hole fits the spindle without forcing.