Norton 66252940294 Surface Grinding Wheel 60 Grit 7 in

Product Description

The NORTON 66252940294 is a Type 1 straight surface grinding wheel designed for precision stock removal on surface grinders, cylindrical grinders, and CNC cutting tool machines. It measures 7 inches in diameter, 3/8 inches thick, with a 1-1/4 inches arbor hole. The abrasive is white aluminum oxide bonded in a vitrified bond matrix, rated at K hardness (medium grade) with a semi-friable structure that promotes controlled breakdown and consistent cutting action. Maximum operating speed is 3600 RPM. This wheel is installed by machinist-trade professionals and tool room technicians working on production or toolroom surface grinding applications.

This wheel is suited for grinding soft carbon steels, tool steels, and super alloys. Its medium grit (60) and medium hardness make it a general-purpose choice for moderate material removal with reasonable surface finish. The vitrified bond and non-porous structure provide rigidity and stability under the controlled coolant and dry-grinding conditions typical of surface grinder work. It is non-tapered with no recess, conforming to standard Type 1 wheel geometry for straightforward mounting on compatible spindle flanges.

Key Features

• White aluminum oxide abrasive for cool, consistent cutting on ferrous metals and super alloys
• Vitrified bond provides rigidity and dimensional stability at operating speed
• K hardness (medium grade) balances wheel life with free-cutting action
• Semi-friable grain structure supports controlled self-dressing during use
• Non-porous, non-tapered Type 1 form fits standard surface grinder spindles
• Rated to 3600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines requiring a Type 1 straight wheel with a 1-1/4 inches arbor hole. Suitable for material applications including soft carbon steels, tool steels, and super alloys per manufacturer specification (Series 38A Type 1, specification 38A60-KVBE).

Installation Notes

Grinding wheel installation and dressing should be performed by qualified personnel following ANSI B7.1 safety requirements for the use, care, and protection of abrasive wheels. 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 mounting, and never exceed the maximum operating speed of 3600 RPM. Use properly sized flange hardware and blotters as required by the machine manufacturer.