Norton 66252836977 Type 12 Grinding Wheel 6 in 60 Grit

Product Description

The NORTON 66252836977 is a Type 12 vitrified aluminum oxide grinding wheel designed for precision tool grinding and reconditioning applications. The wheel measures 6 inches in diameter with a 1/2-inch overall thickness and a 3/8-inch face width, seating on a 1-1/4-inch arbor hole. At 60 grit with a J hardness code and medium grade classification, it delivers consistent stock removal on tool steel and similar workpieces. Maximum operating speed is 4,140 RPM. The friable aluminum oxide abrasive fractures cleanly during use to expose fresh cutting edges, reducing heat buildup at the grind zone. Installed by tool and cutter grinder operators in machine shops and industrial maintenance environments.

This wheel is suited for tool and cutter grinder applications requiring a medium-grit, vitrified-bond abrasive. The Type 12 form factor makes it appropriate for grinding cutting tool faces, clearance angles, and similar precision profiles. Its white aluminum oxide construction is commonly applied to carbon steel, high-speed steel, and similar ferrous tool materials where thermal sensitivity is a concern. The non-porous structure maintains dimensional stability under repeated use at rated speeds.

Key Features

• Type 12 wheel form for tool and cutter grinder use
• 60 grit aluminum oxide abrasive, medium grade, J hardness code
• Vitrified bond for dimensional stability and consistent cut
• Friable abrasive fractures to self-sharpen and limit heat buildup
• 4,140 RPM maximum operating speed
• White wheel color for visual wear monitoring

Compatibility

Designed as a replacement or consumable grinding wheel for Type 12 tool and cutter grinder spindles accepting a 1-1/4-inch arbor hole and a 6-inch diameter wheel.

Installation Notes

Grinding wheels must be installed by qualified personnel following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Power down and lock out the grinder before mounting or removing the wheel. Inspect the wheel for cracks or chips before installation and perform a ring test. Never exceed the rated maximum RPM of 4,140 and always use the appropriate guards.