Norton 66253044090 Surface Grinding Wheel 46 Grit 8 in

Product Description

The NORTON 66253044090 is a Type 1 surface grinding wheel engineered for aggressive material removal on hard-to-grind ferrous metals. Built with a ceramic abrasive grain and vitrified bond, this wheel delivers consistent cut rates and thermal resistance across extended production runs. At 8 inches in diameter, 1/2 inch thick, and with a 1-1/4 inch arbor hole, it installs on standard surface grinder spindles. The 46-grit, J-hardness specification places it in the coarse-cut, medium-hardness category — well suited for stock removal applications where surface finish is secondary to material takedown rate. Rated at 3,600 RPM maximum, it falls within the operating envelope of most production surface grinders.

This wheel is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. It performs on a broad range of demanding materials including 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. The semi-friable ceramic grain self-sharpens as it breaks down, reducing the need for frequent dressing in production environments. It is a practical choice for tool rooms, job shops, and production grinding cells working with high-alloy and high-hardness workpieces.

Key Features

• Ceramic abrasive grain with vitrified bond for aggressive stock removal and thermal stability
• 46 grit, coarse grade for high material removal rates on hard metals
• J hardness code, medium hardness rating — resists glazing while maintaining form
• Semi-friable grain structure continuously exposes fresh cutting edges during use
• Porous wheel construction promotes coolant flow and chip clearance
• 3,600 RPM maximum speed rating for use on standard production surface grinders
• Series 5SG Type 1 specification (5SG46-JVS) for straightforward procurement and replacement

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Rated for grinding 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. Fits spindles requiring a 1-1/4 inch arbor hole.

Installation Notes

Installation should be performed by a qualified grinding machine operator or maintenance technician. Always power down and lock out the grinder before mounting or removing a wheel. Inspect the wheel for cracks or chips before mounting — never mount a damaged wheel. Follow ANSI B7.1 safety requirements for wheel mounting, guarding, and speed verification before returning the machine to service.