Norton 66252939223 Surface Grinding Wheel 7in 100 Grit

Product Description

The NORTON 66252939223 is a Type 1 surface grinding wheel built for precision stock removal on soft carbon steels, tool steels, and super alloys. The wheel measures 7 inches in diameter by 1/8 inches thick with a 1-1/4 inch arbor hole. The abrasive is white aluminum oxide (38A series), vitrified bonded, and rated at K hardness — a medium-hard grade that resists loading while maintaining consistent cut on harder workpiece materials. At 100 grit, the wheel produces a fine surface finish. Maximum operating speed is 3,550 RPM. Installed and dressed by machining professionals on surface grinders, cylindrical grinders, and CNC cutting tool machines.

This wheel is suited for surface grinding applications requiring a fine finish on soft carbon steels, tool steels, and super alloys. The semi-friable aluminum oxide abrasive self-sharpens as the wheel wears, making it a reliable choice for production grinding environments. Typical applications include tool and cutter grinding, surface plate work, and finish passes on hardened steel components. The non-porous, non-tapered, no-recess Type 1 flat profile is the most common wheel geometry for reciprocating and rotary surface grinders.

Key Features

• White aluminum oxide abrasive (38A series) — semi-friable for consistent self-sharpening action
• Vitrified bond for high rigidity and coolant compatibility
• K hardness (medium) resists glazing on tool steels and super alloys
• 100 grit fine grade for finish-pass surface grinding
• Type 1 flat wheel, no recess, non-tapered — fits standard surface grinder spindles
• 3,550 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Rated for material applications including soft carbon steels, tool steels, and super alloys.

Installation Notes

Installation must be performed by a qualified machinist or grinding professional in accordance with ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Inspect the wheel for cracks or chips before mounting — never mount a damaged wheel. Power down and lock out the grinder before changing wheels. Always run the newly mounted wheel under guard at operating speed for at least one minute before bringing it into contact with the workpiece.