Norton 66252836533 Surface Grinding Wheel 60 Grit 6 in

Product Description

The NORTON 66252836533 is a Type 1 surface grinding wheel designed for precision stock removal on ferrous metals and high-performance alloys. Built with white aluminum oxide abrasive in a vitrified bond matrix, this wheel delivers consistent cut rates and thermal stability across extended grinding cycles. It measures 6 inches in diameter, 1/2 inch thick, and carries a 1-1/4 inch arbor hole. The 60-grit, K-hardness (medium grade) rating suits intermediate material removal where surface finish and dimensional accuracy both matter. Rated to 4140 RPM, it fits standard surface, cylindrical, and CNC tool grinding spindles. Machinists and tool room technicians are the primary users.

This wheel is suited for surface grinding applications involving soft carbon steels, tool steels, and super alloys in both job shop and production environments. The 38A series aluminum oxide formulation is semi-friable, meaning the abrasive fractures under load to expose fresh cutting edges, which helps maintain consistent performance on hard and abrasion-resistant work materials. Typical use cases include flat surface finishing on hardened tool steel blanks, jig grinding, and precision reconditioning of cutting tools. It is compatible with surface grinders, cylindrical grinders, and CNC cutting tool machines.

Key Features

• White aluminum oxide abrasive for consistent performance on ferrous metals and super alloys
• Vitrified bond construction provides rigidity and resistance to heat distortion during grinding
• Semi-friable grain fractures under load to maintain sharp cutting action
• 60 grit, K hardness (medium grade) balances material removal rate with surface finish quality
• Type 1 straight wheel profile fits standard surface and cylindrical grinder arbors
• Non-porous, non-tapered, no-recess design for predictable mounting and runout

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Rated material applications include soft carbon steels, tool steels, and super alloys. Fits spindles accepting a 1-1/4 inch arbor hole on Type 1 straight wheels.

Installation Notes

Installation should be performed by a qualified machinist or grinding equipment technician. Before mounting, inspect the wheel for cracks or chips using the ring test per ANSI B7.1 standards, and confirm the machine spindle speed does not exceed the 4140 RPM rating marked on the wheel. Power down and lock out the grinder before changing wheels. Never force a wheel onto a spindle or use adapters that alter the specified bore size.