Norton 66252939689 Surface Grinding Wheel 220 Grit 7 in

Product Description

The NORTON 66252939689 is a Type 1 surface grinding wheel designed for precision material removal on ferrous and non-ferrous metals. Built with aluminum oxide abrasive and a vitrified bond, this wheel operates at a maximum of 3600 RPM and delivers a very fine finish at 220 grit. The vitrified bond provides rigidity and consistent cut rate, making it well suited for applications where dimensional accuracy and surface finish quality are critical. At 7 inches in diameter and 1/4 inch thick with a 1-1/4 inch arbor hole, it mounts directly to standard surface grinder spindles. Licensed trades and toolroom machinists are the primary installers.

This wheel is rated for use on 400 series stainless steel, hard and soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. It is designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. The 220 grit very fine grade makes it appropriate for finish grinding passes rather than aggressive stock removal. The porous structure of the wheel promotes chip clearance and reduces heat buildup at the workpiece surface during extended grinding cycles.

Key Features

• 220 grit very fine aluminum oxide abrasive for finish-quality surface grinding
• Vitrified bond provides dimensional stability and consistent cut performance
• Type 1 straight wheel profile fits standard surface and cylindrical grinder spindles
• Porous wheel structure improves chip clearance and reduces grinding heat
• Hardness code L, medium hardness rating suitable for a wide range of workpiece materials
• Rated to 3600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Rated material applications include 400 series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron.

Installation Notes

This wheel should be installed and dressed by a qualified machinist or grinding technician familiar with ANSI B11.9 grinding machine safety standards. Always inspect the wheel for cracks or chips before mounting and perform a ring test. Power down and lock out the grinder before changing wheels. Never exceed the rated maximum RPM of 3600 and confirm the machine spindle speed before operation.