Lee Valley Norton 3X Grinding Wheels

These are designed for tough grinding jobs, such as reshaping turning tools, grinding hard alloys, heavy material removal in tool-making and restoration, or sharpening small or rounded tools that could hollow softer wheels.

They have a hard grade-K bond, yet run cooler than standard wheels because the ceramic alumina abrasive micro-fractures to expose fresh cutting edges, reducing friction. The wheels do not wear quickly, so require truing less often.

Two grits are available: 46x for heavy stock removal and a general-purpose 80x. The 6″ and 8″ wheels have 1″ arbor holes; the 6″ has four bushings (for 1/2″, 5/8″, 3/4″, and 7/8″ shafts); the 8″ has three bushings (for 5/8″, 3/4″, and 7/8″ shafts). Maximum rpm is 5410 for the 6″ wheels and 3600 for the 8″.

Note: The 8″ wheel should be used only on grinders that are designed for 8″ wheels, with no modification to the grinder.