Norton 66260392754 Diamond Mounted Point 140 Grit

Product Description

The NORTON 66260392754 is a diamond abrasive mounted point designed for precision grinding, deburring, and finishing of hard materials. The 1250MD cylinder-shaped point uses a diamond abrasive matrix rated at 140 grit with a medium grade, making it well-suited for controlled stock removal and surface refinement on hardened steel, carbide, ceramics, glass, and similar hard substrates. The 1/8-inch shank fits standard rotary tools, die grinders, and Dremel-style handpieces. At 0.10 pounds, the unit ships individually and is sized for detail work in tight or contoured areas.

This mounted point is used in toolrooms, maintenance shops, and fabrication environments where hard or brittle materials require controlled grinding. Typical applications include sharpening carbide tooling, cleaning up hardened bores, finishing ceramic components, and detail grinding in aerospace, metalworking, and industrial maintenance settings. The cylinder geometry suits flat-bottom grinding and side-wall contact in blind holes or slots. Licensed tradespeople and toolroom machinists are the primary installers and operators of this type of abrasive.

Key Features

• Diamond abrasive material for grinding hardened steel, carbide, ceramics, and glass
• 140 grit, medium grade for controlled stock removal and surface finishing
• 1250MD cylinder point shape suits flat-bottom and side-wall grinding applications
• 1/8-inch shank diameter fits standard die grinders and rotary handpieces
• 0.25-inch head diameter and 0.312-inch head thickness for detail work in confined areas
• 2.25-inch overall length provides reach into bores and slots

Compatibility

Designed for use with rotary tools, die grinders, and collet-style handpieces accepting a 1/8-inch shank. Suitable for grinding applications on hardened and abrasion-resistant materials where conventional aluminum oxide or silicon carbide abrasives are insufficient.

Installation Notes

Installation and operation should be performed by qualified toolroom technicians or machinists familiar with abrasive mounted point safety practices. Verify that the rotary tool or die grinder spindle speed does not exceed the maximum RPM rating for the mounted point before use. Inspect the point for cracks or damage prior to each use and replace if any defects are found. Always use appropriate eye protection and follow applicable ANSI B7 abrasive safety standards during operation.