Norton 66252909755 Surface Grinding Wheel 46 Grit 7 in

Product Description

The NORTON 66252909755 is a Type 1 vitrified aluminum oxide surface grinding wheel built for precision stock removal on ferrous metals. At 7 inches in diameter and 1/4 inch thick with a 1-1/4 inch arbor hole, this wheel mounts directly to standard surface and cylindrical grinders. The 46-grit, J-hardness (coarse grade) specification delivers aggressive material removal while the semi-friable aluminum oxide abrasive self-sharpens under load. The vitrified bond provides rigidity and thermal resistance, making it well suited for wet or dry surface grinding operations. The 38A46-JVBE specification designation allows direct cross-referencing for replacement purchasing.

This wheel is rated for use on soft carbon steels, tool steels, and super alloys. It is designed for professional use on surface grinders, cylindrical grinders, and CNC cutting tool machines. The white aluminum oxide composition is a standard choice for tool room and production grinding where consistent finish and predictable wear are required. With a maximum operating speed of 3,600 RPM, it suits benchtop and floor-model surface grinding equipment commonly found in machine shops, tool rooms, and industrial maintenance facilities.

Key Features

• 46-grit coarse grade for aggressive stock removal on ferrous and alloy metals
• J hardness (medium wheel hardness rating) for balanced wear and cut rate
• Vitrified bond provides rigidity and resistance to heat buildup during grinding
• Semi-friable aluminum oxide abrasive self-sharpens to maintain cutting efficiency
• Type 1 flat wheel profile with no recess, compatible with standard surface grinder 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 soft carbon steels, tool steels, and super alloys. Series designation 38A Type 1 can be used for direct OEM and aftermarket cross-reference.

Installation Notes

Installation should be performed by a qualified machinist or grinding equipment operator. Before mounting, inspect the wheel for cracks or chips using the ring test; never mount a damaged wheel. Power down and lock out the grinder before changing wheels, and confirm the machine spindle speed does not exceed the 3,600 RPM maximum rating stamped on the wheel. Flanges and blotters must be clean, flat, and properly sized per ANSI B7.1 safety standards before tightening the arbor nut.