Norton 66252939690 Surface Grinding Wheel 46 Grit 7 in

Product Description

The NORTON 66252939690 is a Type 1 surface grinding wheel engineered for precision stock removal on ferrous metals. Built around white aluminum oxide abrasive in a vitrified bond, this wheel delivers consistent, controlled cutting action across a range of metalworking applications. It measures 7 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole, and is rated to a maximum of 3600 RPM. The 46 grit, H hardness (coarse grade) combination makes it well suited for aggressive material removal while maintaining wheel integrity under sustained load. The semi-friable abrasive continuously exposes fresh cutting edges as the wheel wears.

This wheel is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines in production and job-shop environments. It performs best on soft carbon steels, tool steels, and super alloys where a coarse, free-cutting action is required. The 38A series specification confirms this wheel meets Norton's vitrified bond standards for consistent performance in wet or dry precision grinding operations. It is primarily installed and operated by machinists and tool-and-die professionals in industrial and commercial settings.

Key Features

• White aluminum oxide abrasive for consistent, cool cutting on ferrous metals
• Vitrified bond construction provides rigidity and porosity for coolant flow
• 46 grit coarse grade for aggressive stock removal
• H hardness rating (soft) prevents glazing on harder workpiece materials
• Semi-friable grain continuously self-sharpens during use
• Non-porous, non-tapered Type 1 flat wheel profile with no recess

Compatibility

Rated for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding soft carbon steels, tool steels, and super alloys. Fits spindles accepting a 1-1/4 inch arbor hole.

Installation Notes

Grinding wheel mounting and dressing must be performed by qualified personnel following ANSI B7.1 safety standards. Always power down and de-energize the machine before mounting or changing wheels. Inspect the wheel for cracks or chips using the ring test before installation, and never exceed the 3600 RPM maximum speed rating. Use the correct flanges and blotters as specified by the machine manufacturer.