Norton 66253364390 Surface Grinding Wheel 60 Grit 14 in

Product Description

The NORTON 66253364390 is a Type 5 recessed surface grinding wheel engineered for high-stock-removal applications on ferrous and non-ferrous metals. Built with aluminum oxide abrasive and a vitrified bond, it delivers consistent, controlled cutting action across a range of hard and soft materials. The wheel measures 14 inches in diameter and 2 inches thick with a 5-inch arbor hole, and carries a 60-grit, K-hardness (medium) rating. It is rated to a maximum of 1800 RPM. The vitrified bond structure provides rigidity and porosity, making it well suited for precision surface grinding where form retention and heat dissipation matter. Machinists and tool-and-die professionals are the primary users of this wheel.

This wheel is designed for use on surface grinders and cylindrical grinders in both job shop and production environments. Verified material applications include 400 Series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. The one-side recess measures 8 inches in diameter and 1 inch deep, reducing wheel weight and clearance interference on compatible flanged spindle setups. It suits applications that demand a stable, open-structure wheel capable of handling aggressive cuts without glazing.

Key Features

• Aluminum oxide abrasive with vitrified bond for rigidity and controlled stock removal
• 60 grit, K hardness (medium grade) suited for general-purpose and semi-finish grinding
• Type 5 recessed profile with 8-inch recess diameter and 1-inch recess depth for flange clearance
• Porous wheel structure promotes coolant flow and heat dissipation during extended grinding passes
• Compatible with 400 Series stainless, carbon steels, tool steels, aluminum, and multiple cast iron grades
• 32A specification series — a recognized Norton aluminum oxide formulation for industrial grinding

Compatibility

Designed for use with surface grinders and cylindrical grinders. Verified material applications include 400 Series stainless steel, hard and soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. Confirm spindle speed, flange diameter, and arbor bore compatibility before mounting.

Installation Notes

Grinding wheel installation and dressing should be performed by a qualified machinist or grinding equipment operator following ANSI B11.9 and OSHA 29 CFR 1910.215 standards for abrasive wheel machinery. Always power down and lock out the grinder before mounting or removing the wheel. Perform a ring test before installation to check for cracks, and never exceed the 1800 RPM maximum speed rating marked on the wheel. Use matched, clean flanges of the correct diameter and install blotter gaskets as required by the machine manufacturer.