Norton 66252939823 Surface Grinding Wheel 100 Grit 7 in

Product Description

The NORTON 66252939823 is a Type 1 surface grinding wheel designed for precision material removal on ferrous metals and high-performance alloys. It measures 7 inches in diameter and 1/4 inch thick, with a 1-1/4 inch arbor hole. The abrasive is white aluminum oxide with a vitrified bond, graded Fine at 100 grit and rated I hardness (medium). This combination delivers consistent stock removal and a controlled finish on soft carbon steels, tool steels, and super alloys. Rated to 3600 RPM, it is suitable for production and toolroom environments where wheel integrity and cut quality matter.

This wheel is intended for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. The 38A Type 1 series is a standard straight-wheel profile with no recess and no taper, making it straightforward to mount on compatible spindle flanges. It is used in both job-shop and production settings wherever flat-surface or OD grinding is performed on ferrous and superalloy workpieces. Typical installers are tool-and-die machinists, grinding machine operators, and industrial maintenance technicians.

Key Features

• White aluminum oxide abrasive — semi-friable grain suited for tool steels and super alloys
• Vitrified bond provides rigidity and consistent wheel breakdown during grinding
• 100 grit Fine grade for controlled stock removal and smooth surface finish
• I hardness (medium) rating balances wheel life against self-dressing behavior
• Non-porous, no-recess, no-taper Type 1 straight profile for standard spindle mounting
• 3600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding soft carbon steels, tool steels, and super alloys. The 38A Type 1 straight-wheel format fits standard 1-1/4 inch arbor flanges on compatible grinding machines.

Installation Notes

Grinding wheel mounting and dressing should be performed by a qualified machine operator or maintenance technician familiar with ANSI B11.9 and OSHA 1910.215 guarding requirements. Always power down and lock out the machine before mounting or removing the wheel. Inspect the wheel for cracks or chips using the ring test before installation, and never exceed the rated 3600 RPM maximum speed. Use proper flanges and a paper or blotter washer between the flange and wheel face; do not over-tighten the spindle nut.