Norton 66252911677 Surface Grinding Wheel 7in 60 Grit

Product Description

The NORTON 66252911677 is a Type 1 surface grinding wheel designed for precision stock removal on ferrous metals and high-performance alloys. Built from white aluminum oxide abrasive with a vitrified bond, it measures 7 inches in diameter, 0.5 inches thick, with a 1.25-inch arbor hole. Rated at a maximum of 3600 RPM and carrying an L hardness code (medium grade), this wheel delivers consistent, cool cutting action across a range of surface and cylindrical grinding applications. It is suited for licensed machinists and grinding technicians working in production or toolroom environments.

This wheel is appropriate for use on soft carbon steels, tool steels, and super alloys. It fits CNC cutting tool machines, cylindrical grinders, and surface grinders. The 38A Type 1 series designation identifies it as a straight-profile, non-recessed wheel with a semi-friable grain structure, which allows controlled breakdown to expose fresh cutting edges during grinding passes. It is commonly found in toolroom, job shop, and industrial maintenance settings where consistent surface finish and dimensional accuracy are required.

Key Features

• White aluminum oxide abrasive provides cool, consistent cutting action on tool steels and super alloys
• Vitrified bond offers rigidity and porosity control for stable stock removal rates
• Semi-friable grain structure promotes self-sharpening behavior during use
• L hardness code (medium grade) balances wheel life with cutting efficiency
• Type 1 straight profile with no recess fits standard surface and cylindrical grinder spindles
• 3600 RPM maximum speed rating for safe operation on compatible machines

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines that accept a Type 1 straight wheel with a 1.25-inch arbor hole and a 7-inch diameter. Suitable for grinding soft carbon steels, tool steels, and super alloys per the 38A Type 1 series specification.

Installation Notes

Wheel mounting and dressing must be performed by a qualified machinist or grinding technician in accordance with ANSI B11.9 and the machine manufacturer's safe operating procedures. Always power down and lock out the grinder before mounting or removing the wheel. Inspect the wheel for cracks or chips using the ring test before installation, and never exceed the rated maximum RPM of 3600. Use appropriate flanges and blotters as specified by the grinder manufacturer.