Norton 66252939557 Surface Grinding Wheel 80 Grit 7in

Product Description

The NORTON 66252939557 is a Type 1 surface grinding wheel engineered for precision stock removal on a range of ferrous and non-ferrous metals. Built around an aluminum oxide abrasive grain bonded in a vitrified matrix, this wheel delivers consistent cut rates and predictable wear characteristics across demanding grinding cycles. At 7 inches in diameter and 1/4 inch thick with a 1-1/4 inch arbor hole, it mounts directly to standard surface grinders and cylindrical grinders. The 80 grit, H hardness (medium grade) specification targets applications where moderate material removal and a reasonably smooth finish are both required. Rated to 3600 RPM. Wheel weight is approximately 0.79 pounds.

This wheel is suited for surface grinding, cylindrical grinding, and CNC cutting tool machine operations in both production and job-shop environments. Material applications include 400 series stainless steel, hard and soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. It is appropriate for both manual and automated grinding operations where consistent wheel geometry and a vitrified bond are required for coolant compatibility and dressing frequency control. Licensed trade machinists and tool-and-die professionals are the primary installers and operators.

Key Features

• Aluminum oxide abrasive grain — well-suited for ferrous metals including stainless and tool steels
• Vitrified bond construction supports coolant use and allows precise wheel dressing
• 80 grit, H hardness (medium grade) balances stock removal rate with surface finish quality
• Porous wheel structure promotes chip clearance and reduces heat buildup during grinding
• Type 1 flat wheel profile with no recess — straightforward mounting on standard arbors
• 3600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines accepting a 7 inch diameter, 1/4 inch thick, Type 1 wheel with a 1-1/4 inch arbor hole. Series designation: 32A Type 1 (specification code 32A80-HVBE).

Installation Notes

Installation and wheel changes must be performed by qualified personnel following ANSI B7.1 safe use requirements for abrasive wheels. Always inspect the wheel for cracks or chips before mounting and perform a ring test. Power down and lock out the grinder before removing or installing any wheel. Never exceed the 3600 RPM maximum speed rating marked on the wheel or its packaging.