Norton 66243530378 Type 11 Grinding Wheel 4in 46 Grit

Product Description

The NORTON 66243530378 is a Type 11 flaring cup grinding wheel designed for tool and cutter grinding applications. Built with white aluminum oxide abrasive and a vitrified bond, it delivers consistent stock removal on tool steels, carbide-tipped tooling, and similar hard materials. The wheel runs at a maximum of 5,730 RPM and carries a K hardness code, indicating a medium-grade bond that holds abrasive grain firmly while still releasing dull grains to expose fresh cutting edges. At 46 grit, it performs coarse-to-medium material removal, making it a practical choice for reshaping cutting edges before finishing passes.

This wheel is suited for use on bench grinders and pedestal grinders in machine shops, tool rooms, and maintenance environments. The Type 11 (flaring cup) profile is commonly matched to surface and tool grinding machines where side-face contact is needed to true up and sharpen milling cutters, drills, lathe tools, and similar tooling. The vitrified bond construction supports cool cutting and dressing ease, which matters when maintaining close tolerances on resharpened tooling. Installation and operation are typically handled by machinists and maintenance technicians familiar with grinding wheel safety standards.

Key Features

• White aluminum oxide abrasive for clean, cool cutting on tool steels
• Vitrified bond allows easy dressing and maintains wheel form
• Type 11 flaring cup profile for side-face grinding contact
• 46 grit for efficient coarse-to-medium stock removal
• K hardness (medium) balances grain retention with self-sharpening action
• Rated to 5,730 RPM maximum operating speed

Compatibility

Designed as an OEM-style replacement or direct-use grinding wheel for bench grinders and pedestal tool grinders accepting a Type 11 cup wheel with a 1-1/4 inch arbor hole and 4 inch diameter.

Installation Notes

Grinding wheel mounting and operation should be performed by qualified personnel following ANSI B7.1 safety standards. Always power down and lock out the grinder before mounting or removing a wheel. Inspect the wheel for cracks or chips before installation and perform a ring test; do not use a wheel that does not emit a clear tone. Never exceed the maximum RPM stamped on the wheel or listed by the manufacturer, and always use the appropriate flanges and blotter washers.