Norton 66252942431 Surface Grinding Wheel 7in 60 Grit Type 5

Product Description

The NORTON 66252942431 is a Type 5 recessed surface grinding wheel built for demanding material removal on hard ferrous metals and specialty alloys. It measures 7 inches in diameter and 1 inch thick, with a 1-1/4 inch arbor hole and a 2-3/4 inch recess diameter at 1/2 inch depth on one side. The wheel uses Norton's ceramic abrasive grain in a vitrified bond, rated at J hardness (medium grade) and 60 grit. The ceramic grain is semi-friable, meaning it fractures to expose fresh cutting edges during use, reducing heat buildup and extending wheel life compared to conventional aluminum oxide.

This wheel is designed for use on surface grinders and cylindrical grinders in production and maintenance shops. Material applications include 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. The Type 5 recessed profile provides clearance for certain wheel flanges and workholding setups common in precision surface grinding operations. It is sized for shops running 7-inch capacity machines and suits both toolroom and production grinding environments.

Key Features

• Ceramic semi-friable abrasive grain continuously fractures for consistent cut rate and reduced glazing
• Vitrified bond provides rigidity and porosity for free chip clearance during grinding
• Type 5 one-side recess (2-3/4 inch diameter, 1/2 inch deep) clears flanges and adapters
• 60 grit medium grade removes material efficiently while maintaining controllable surface finish
• Rated to 3600 RPM maximum operating speed
• Compatible with a broad range of hard ferrous and exotic alloy workpieces

Compatibility

Rated for use with surface grinders and cylindrical grinders. Material applications stated by the manufacturer include 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. Series designation is 5SG Type 5.

Installation Notes

Grinding wheel mounting and dressing should be performed by a qualified machinist or grinding technician following ANSI B11.9 and OSHA 1910.215 standards. Always perform a ring test before mounting and never exceed the 3600 RPM maximum speed marked on the wheel. Power down and lock out the grinder before changing wheels. Use proper flanges and blotters as specified for the machine and wheel diameter.