Norton 66253246828 Surface Grinding Wheel 7in 46 Grit Type 5

Product Description

The NORTON 66253246828 is a Type 5 surface grinding wheel designed for precision stock removal on ferrous and non-ferrous metals in industrial grinding applications. Built with aluminum oxide abrasive and a vitrified bond, this wheel measures 7 inches in diameter and 3/4 inches thick, with a 1-1/4 inch bore. The 46-grit coarse grade and K hardness rating (medium wheel hardness) deliver aggressive cutting action while maintaining wheel integrity at speeds up to 3600 RPM. A one-side recess measuring 3 inches in diameter and 1/4 inch deep reduces weight and allows clearance at the wheel flange. Licensed HVAC techs, machinists, and tool-and-die professionals working with surface or cylindrical grinders will recognize this as a workhorse wheel for high-material-removal passes.

This wheel is suited for surface and cylindrical grinding operations across a broad range of materials including 400 series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. It is compatible with both surface grinders and cylindrical grinders. The 32A Series designation identifies the specific aluminum oxide grain structure, which is optimized for consistent finish on harder ferrous alloys. At 2.86 pounds, it handles well on standard spindle setups without excessive vibration when properly dressed.

Key Features

• Aluminum oxide abrasive with vitrified bond for rigid, consistent grain exposure
• 46-grit coarse grade for high material removal rates on steel and iron
• K hardness code, medium-rated wheel hardness for balanced cut and wheel life
• Type 5 one-side recessed profile, 3 inches recess diameter x 1/4 inch deep, for flange clearance
• Rated to 3600 RPM maximum operating speed
• Suited for 400 series stainless, carbon steels, tool steels, aluminum, and multiple iron grades

Compatibility

Designed for use with surface grinders and cylindrical grinders. Compatible material applications include 400 Series Stainless, Hard Carbon Steels, Soft Carbon Steels, Tool Steels, Aluminum, Cast Iron, Ductile Iron, and Gray Iron. Confirm spindle speed does not exceed 3600 RPM and that the machine arbor accepts a 1-1/4 inch bore before mounting.

Installation Notes

Grinding wheel installation and dressing should be performed by qualified personnel following ANSI B7.1 safety standards. Power down and lock out the grinder completely before mounting or removing any wheel. Inspect the wheel for cracks or chips before each use — never mount a damaged wheel. Always use the appropriate flanges and blotters, and perform a ring test prior to mounting.