Norton 66252942809 Surface Grinding Wheel 46 Grit 7 in

Product Description

The NORTON 66252942809 is a Type 5 recessed surface grinding wheel engineered for use on surface grinders and cylindrical grinders in demanding metalworking environments. Built from aluminum oxide abrasive with a vitrified bond, this wheel delivers consistent stock removal on soft carbon steels, tool steels, and super alloys. It carries a coarse grade rating at 46 grit with an I hardness code, placing it in the medium hardness range. The semi-friable grain structure self-sharpens during use, maintaining cut rate across extended runs. Rated to a maximum of 3600 RPM, the wheel measures 7 inches in diameter, 1 inch thick, and accepts a 1-1/4 inch arbor bore. Package weight is approximately 2.93 pounds.

This grinding wheel is suited for production and maintenance grinding operations on surface grinders and cylindrical grinders. Its coarse 46-grit aluminum oxide abrasive makes it well-matched for aggressive material removal on soft carbon steels, tool steels, and super alloys. The Type 5 configuration features a single-side recess measuring 3 inches in diameter and 1/2 inch deep, which reduces contact area and heat buildup during surface grinding passes. It is appropriate for both job-shop and industrial settings where consistent wheel performance and dimensional stability are required.

Key Features

• Aluminum oxide abrasive in a vitrified bond for rigid, precise cutting action
• 46 grit coarse grade for fast stock removal on ferrous metals and super alloys
• I hardness code (medium) with semi-friable grain for balanced wheel wear and self-sharpening
• Type 5 single-side recess reduces grinding contact area and dissipates heat
• 3-inch recess diameter and 1/2-inch recess depth for compatible spindle nose clearance
• Rated to 3600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders and cylindrical grinders. Material applications include soft carbon steels, tool steels, and super alloys. Wheel series specification is 38A Type 5.

Installation Notes

Grinding wheel installation should be performed by a qualified machinist or grinding equipment operator with the machine fully de-energized and locked out per OSHA lockout/tagout procedures. Always inspect the wheel for cracks or chips before mounting — never mount a damaged wheel. Use proper blotter flanges and confirm that the machine spindle speed does not exceed the 3600 RPM maximum rating marked on the wheel. Dress the wheel with an appropriate diamond dresser before initial use to true the face and expose fresh abrasive grain.