Norton 66252942222 Type 5 Surface Grinding Wheel 46 Grit

Product Description

The NORTON 66252942222 is a Type 5 recessed surface grinding wheel engineered for precision stock removal on ferrous metals and high-performance alloys. Built from aluminum oxide abrasive in a vitrified bond matrix, it delivers consistent cut rates and predictable wheel wear across extended grinding cycles. The wheel measures 7 inches in diameter and 0.75 inches thick with a 1.25-inch arbor hole, a one-side recess of 0.25 inches deep at 2.75 inches in diameter, and carries an I hardness code rating at 46 grit coarse grade. Rated to 3600 RPM, this wheel is suited to surface grinders and cylindrical grinders operated by machinist and tool-room professionals.

This grinding wheel is designed for use on soft carbon steels, tool steels, and super alloys in surface grinding and cylindrical grinding applications. The 38A series semi-friable aluminum oxide grain self-sharpens during cut, making it effective on harder tool steels that would load a less friable abrasive. It is appropriate for both production grinding and precision tool-room work where consistent surface finish and dimensional control are required. The white wheel color aids visual inspection of dress condition between passes.

Key Features

• Type 5 recessed profile with a 0.25-inch deep, 2.75-inch diameter one-side recess for clearance on center-mount applications
• 38A series semi-friable aluminum oxide grain promotes self-sharpening action on hard and abrasion-resistant workpiece materials
• Vitrified bond provides rigid support, predictable dressing behavior, and thermal resistance during wet or dry grinding
• 46 grit coarse grade suited for aggressive stock removal on soft carbon steels, tool steels, and super alloys
• I hardness code medium-grade wheel balances grain retention with controlled breakdown to resist glazing
• 3600 RPM maximum operating speed; porous structure supports coolant flow and chip clearance

Compatibility

Rated for use with surface grinders and cylindrical grinders. Material application includes soft carbon steels, tool steels, and super alloys as stated by the manufacturer. Arbor hole size is 1.25 inches; verify spindle compatibility before mounting.

Installation Notes

Grinding wheel installation must be performed by a qualified machinist or grinding equipment operator following ANSI B11.9 and OSHA 29 CFR 1910.215 standards for abrasive wheel machinery. Always ring-test the wheel for cracks before mounting and use the correct flanges and blotters rated for the wheel diameter. Never exceed the 3600 RPM maximum operating speed marked on the wheel. Guard the grinding machine per manufacturer specifications and allow a free-run period after mounting before bringing the wheel into contact with the workpiece.