Norton 66253043439 Surface Grinding Wheel 8in 80 Grit

Product Description

The NORTON 66253043439 is a Type 1 surface grinding wheel designed for precision stock removal on metallic workpieces. Built around a white aluminum oxide abrasive bonded in a vitrified matrix, it delivers consistent cut rates and predictable wear across extended production runs. The wheel measures 8 inches in diameter and 1/4 inch thick with a 1-1/4 inch arbor hole, making it a standard fit for benchtop and floor-standing surface grinders. At 80 grit and J hardness (medium grade), it sits in the middle of the performance range, aggressive enough for efficient material removal yet controlled enough to hold surface finish tolerances on softer and tool steels. Maximum operating speed is 3600 RPM.

This wheel is suited for grinding soft carbon steels, tool steels, and super alloys in job shop, toolroom, and production environments. It is used on surface grinders, cylindrical grinders, and CNC cutting tool machines. The 38A series designation indicates a semi-friable aluminum oxide grain structure, which self-sharpens under load and maintains cutting efficiency without excessive heat buildup at the workpiece. It is appropriate for both roughing and finish passes on ferrous metals where burn-free results are required.

Key Features

• White aluminum oxide abrasive (38A series) with semi-friable grain for consistent self-sharpening action
• Vitrified bond provides rigid wheel structure and high porosity retention for coolant flow
• 80 grit, J hardness (medium grade) suitable for efficient material removal on soft carbon steels and tool steels
• Type 1 straight wheel profile with no recess and no taper for direct arbor mounting
• 3600 RPM maximum rated operating speed
• Non-porous construction maintains dimensional stability during wet or dry grinding

Compatibility

Rated for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Material applications include soft carbon steels, tool steels, and super alloys. Wheel specification code 38A80-JVBE confirms abrasive, grit, hardness, bond, and series for cross-reference verification.

Installation Notes

Grinding wheel installation and dressing should be performed by a qualified machinist or grinding specialist following ANSI B11.9 safety standards and the machine manufacturer's mounting instructions. Always power down and lock out the grinder before mounting or removing a wheel. Inspect the wheel for cracks or chips using the ring test before installation, and never exceed the rated maximum RPM marked on the wheel or packaging. Blotters must be used between the wheel and flanges as required by machine specifications.