Norton 66253044770 Surface Grinding Wheel 8in 60 Grit

Product Description

The NORTON 66253044770 is a Type 1 surface grinding wheel designed for material removal and surface finishing on a range of metals and hard materials. Built to the 39C specification, it uses silicon carbide abrasive bonded in a vitrified matrix rated at J hardness (medium grade) with a 60-grit cut. The wheel measures 8 inches in diameter, 1 inch thick, and accepts a 1-1/4 inch arbor bore. Maximum operating speed is 3,600 RPM. The green silicon carbide composition makes it well suited for hard, brittle, and non-ferrous materials where a free-cutting, cool-grinding action is needed.

This wheel is used in surface grinding operations across maintenance, tool-and-die, and fabrication environments. Compatible machine types include surface grinders, cylindrical grinders, and CNC cutting tool machines. Stated material applications include 300 Series stainless steel, titanium, aluminum, brass, bronze, copper, gray iron, masonry, and natural stone. It is a non-porous, non-tapered, no-recess straight wheel appropriate for flat surface work and tool reconditioning in both shop and production settings.

Key Features

• Silicon carbide abrasive for effective cutting on non-ferrous metals, stainless steel, and masonry
• Vitrified bond provides rigidity and consistent stock removal
• J hardness code, medium grade — balances wheel life with cutting rate
• 60 grit delivers moderate material removal with acceptable surface finish
• Type 1 straight wheel, no recess, non-tapered — direct drop-in for standard surface grinder arbors
• 3,600 RPM maximum rated speed

Compatibility

Rated for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Stated compatible materials include 300 Series stainless steel, titanium, aluminum, brass, bronze, copper, gray iron, masonry, and natural stone.

Installation Notes

Installation should be performed by a qualified machinist or grinding equipment operator in accordance with ANSI B7.1 safety requirements for the use, care, and protection of abrasive wheels. Before mounting, inspect the wheel for cracks or chips using the ring test. Power down and lock out the grinder before changing wheels. Never exceed the maximum RPM marked on the wheel or the machine spindle speed rating, whichever is lower.