Norton 66253262512 Surface Grinding Wheel 12in 60 Grit

Product Description

The NORTON 66253262512 is a Type 1 surface grinding wheel designed for precision stock removal on hard ferrous materials. Built with a ceramic abrasive grain and a vitrified bond, it delivers consistent cut rates and extended wheel life compared to conventional aluminum oxide wheels. The wheel measures 12 inches in diameter, 1 inch thick, with a 5-inch arbor hole. It carries a 60 grit, J hardness (medium grade) rating and is rated to a maximum of 2070 RPM. The porous, semi-friable structure allows for free cutting action while maintaining form under load. Licensed HVAC technicians, machinists, and grinding operators working in precision shops and industrial environments are the primary users.

This wheel is suited for surface grinding and cylindrical grinding applications on 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. It is compatible with CNC cutting tool machines, cylindrical grinders, and surface grinders. The 5SG Type 1 series designation identifies this wheel as part of a ceramic grain line engineered specifically for difficult-to-grind alloys where thermal sensitivity and wheel breakdown are primary concerns. It performs well in both wet and dry grinding setups depending on machine configuration.

Key Features

• Ceramic abrasive grain for aggressive material removal on hard and heat-sensitive alloys
• Vitrified bond with porous structure for free-cutting action and reduced heat buildup
• J hardness (medium grade) provides a balance between wheel longevity and cut rate
• 60 grit for efficient stock removal while maintaining surface finish control
• Type 1 straight wheel profile with no recess, compatible with standard surface grinder spindle flanges
• Semi-friable grain structure allows controlled self-sharpening during use

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suited for grinding 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron.

Installation Notes

Mounting and dressing of grinding wheels must be performed by a qualified operator following ANSI B11.9 and OSHA 29 CFR 1910.215 standards for abrasive wheel machinery. Always inspect the wheel for cracks or damage before mounting and perform a ring test. Power down and lock out the grinder before changing wheels. Do not exceed the maximum rated speed of 2070 RPM under any operating condition.