Norton 66253246900 Type 7 Surface Grinding Wheel 46 Grit

Product Description

The NORTON 66253246900 is a Type 7 recessed surface grinding wheel engineered for use on surface grinders and cylindrical grinders in professional metalworking and tool-room environments. It measures 12 inches in diameter and 2 inches thick, with a 5-inch arbor hole. The abrasive is aluminum oxide, bonded with a vitrified bond and rated at 46 grit coarse grade with a J hardness code. The wheel is rated to a maximum of 2,705 RPM and supports both wet and dry operation. Licensed machinists, tool grinders, and industrial maintenance techs are the primary installers of this wheel.

This wheel is suited for aggressive stock removal on a broad range of ferrous and non-ferrous metals in both production and maintenance grinding applications. It is designed for use on 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. The two-sided recess design, with a 7.5-inch recess diameter and 0.5-inch recess depth, reduces wheel weight and improves clearance on recessed-hub flanges.

Key Features

• Aluminum oxide abrasive delivers consistent cutting action on ferrous and non-ferrous metals
• Vitrified bond provides rigidity and open structure suited for coarse stock removal
• 46 grit coarse grade for high material removal rates
• J hardness code with medium wheel hardness rating balances wheel life and cut rate
• Supports wet and dry grinding operation
• Two-sided recess (7.5-inch diameter, 0.5-inch depth) for recessed-hub flange compatibility

Compatibility

Designed for use with surface grinders and cylindrical grinders. Compatible material applications stated by the manufacturer include 400 Series Stainless, Hard Carbon Steels, Soft Carbon Steels, Tool Steels, Aluminum, Cast Iron, Ductile Iron, and Gray Iron. Series designation is 32A Type 7.

Installation Notes

Grinding wheel mounting must be performed by a qualified operator following ANSI B11.9 and OSHA 1910.215 guidelines. Always ring-test the wheel for cracks before mounting and confirm the machine spindle speed does not exceed the 2,705 RPM rating stamped on the wheel. Power down and lock out the grinder before changing wheels. Use proper flanges and blotters sized for the arbor hole and never exceed the rated maximum speed under any operating condition.