Norton 66252939464 Surface Grinding Wheel 80 Grit 7in

Product Description

The NORTON 66252939464 is a Type 1 surface grinding wheel built for aggressive stock removal on ferrous and exotic materials. It measures 7 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole. The wheel is constructed from ceramic abrasive bonded in a vitrified matrix, rated at K hardness (medium grade) and a maximum operating speed of 3,600 RPM. The porous structure of the vitrified bond promotes coolant flow and chip clearance, reducing heat buildup at the workpiece. This wheel is installed and operated by machinists, tool-and-die technicians, and grinding specialists working with precision grinding equipment.

This grinding wheel is suited for precision surface grinding applications across a range of hard and difficult-to-grind materials. It performs on 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. Compatible machine types include surface grinders, cylindrical grinders, and CNC cutting tool machines. The 80 grit designation delivers a medium-fine finish with efficient material removal, making it a practical choice for production and maintenance grinding operations in job shops and manufacturing facilities.

Key Features

• Ceramic abrasive grain for consistent cut rate on hard ferrous and exotic alloys
• Vitrified bond provides rigid wheel structure and supports coolant penetration through porous design
• K hardness (medium grade) balances wheel life against stock removal rate
• 80 grit delivers medium-fine surface finish suitable for production grinding
• Type 1 flat wheel profile with no recess, no taper — straightforward mounting on standard arbors
• Rated to 3,600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. Series designation is 5SG Type 1 per manufacturer specification 5SG80-KVS.

Installation Notes

Installation should be performed by a qualified machinist or grinding equipment operator following the machine manufacturer's guarding and mounting procedures. Always inspect the wheel for cracks or chips before mounting and perform a ring test. Power down and de-energize the grinder before changing wheels. Never exceed the maximum operating speed of 3,600 RPM marked on the wheel; verify spindle speed matches or falls below this rating before operation.