Norton 66252939838 Surface Grinding Wheel 150 Grit 7in

Product Description

The NORTON 66252939838 is a Type 1 surface grinding wheel designed for precision stock removal and finishing on soft carbon steels, tool steels, and super alloys. Built around a white aluminum oxide abrasive grain with a vitrified bond, this wheel delivers consistent cut rate and a very fine surface finish at a 150 grit rating. The semi-friable grain structure allows the wheel to self-sharpen during use, maintaining cutting efficiency over the wheel's service life. Rated to 3600 RPM, it is suited for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. Licensed machinists and grinding machine operators are the primary installers and users of this wheel.

This wheel fits standard surface and cylindrical grinding applications in both job shop and production environments. Its 7-inch diameter and 1/4-inch thickness make it a direct fit for bench-top and floor-standing surface grinders that accept a 1-1/4-inch arbor bore. The 38A series white aluminum oxide construction is well-regarded for use on heat-sensitive materials and precision tool grinding where burn avoidance and tight tolerance finishes are required. Compatible machines include surface grinders, cylindrical grinders, and CNC cutting tool machines as specified by the manufacturer.

Key Features

• White aluminum oxide abrasive — semi-friable grain for consistent self-sharpening
• Vitrified bond construction provides rigidity and precise form holding
• 150 grit, very fine grade for finish grinding and light stock removal
• K hardness code, medium hardness rating balances wheel life and cut rate
• Non-porous, non-tapered, no-recess Type 1 flat wheel profile
• 3600 RPM maximum speed rating

Compatibility

Compatible with surface grinders, cylindrical grinders, and CNC cutting tool machines accepting a 7-inch diameter wheel with a 1-1/4-inch arbor bore. Intended for use on soft carbon steels, tool steels, and super alloys per manufacturer specification.

Installation Notes

Grinding wheel mounting and dressing must be performed by a qualified machine operator 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. Power down and lock out the grinder before changing wheels. Never exceed the wheel's maximum rated RPM, and always install a properly rated guard before operation.