Norton 66253246829 Surface Grinding Wheel 80 Grit 7 in

Product Description

The NORTON 66253246829 is a Type 1 vitrified aluminum oxide surface grinding wheel built for precision stock removal on ferrous and non-ferrous metals. At 7 inches in diameter and 1/2 inch thick with a 1-1/4 inch arbor hole, it mounts to standard surface grinders and cylindrical grinders. The 80-grit, medium-grade abrasive delivers a balance of cut rate and finish quality, and the H hardness code indicates a soft-to-medium bond that releases dull grains readily to expose fresh cutting edges. Maximum operating speed is 3,600 RPM. The Series 32A designation identifies the bond system and grain structure used in this wheel.

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 suited to surface grinders and cylindrical grinders in tool rooms, machine shops, and maintenance environments. CNC cutting tool machines are also listed as compatible equipment. The non-porous, non-tapered, non-recessed profile makes this a straightforward flat-wheel application on standard spindle setups requiring a 1-1/4 inch bore.

Key Features

• Aluminum oxide abrasive — effective on steels, cast iron, and aluminum
• 80 grit, medium grade — balanced cut rate and surface finish
• H hardness code with vitrified bond — promotes self-dressing action during use
• Type 1 flat wheel geometry — no recess, no taper, straightforward mounting
• 3,600 RPM maximum rated speed
• Series 32A bond specification: 80H8V32A

Compatibility

Rated for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. 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

Grinding wheel installation and dressing should be performed by a qualified machinist or tool-room technician following ANSI B11.9 and OSHA 29 CFR 1910.215 guarding requirements. Before mounting, inspect the wheel for cracks using the ring test and confirm the machine spindle speed does not exceed the 3,600 RPM maximum rating stamped on the wheel. Power down and lock out the grinder before changing wheels. Always use the correct flanges and blotters for the arbor bore size and never force the wheel onto the spindle.