Norton 66253344389 Round Tip Plug 20 Grit Zirconia Alumina

Product Description

The NORTON 66253344389 is a Type 18R round tip plug abrasive designed for aggressive material removal in weld blending, deburring, and surface preparation applications. Built with a zirconia alumina abrasive grain at 20 grit, this plug delivers very coarse cutting action suited for rapid stock removal on steel, stainless steel, and other ferrous metals. It is rated to a maximum of 18,145 RPM, making it compatible with standard die grinders and right-angle grinders used in fabrication and maintenance environments. The 5/8-11 arbor hole thread size allows direct mounting to common grinding spindles without adapters.

This abrasive plug is commonly used by welders, fabricators, pipefitters, and maintenance technicians for tasks including weld seam blending, deburring of drilled or machined holes, and cleaning of metal surfaces in tight or recessed areas. The round tip profile allows the tool to reach confined spaces where flat or cup wheels cannot access. It is appropriate for both shop and field use across light industrial and heavy fabrication settings.

Key Features

• Type 18R round tip plug geometry for access to recessed and contoured work areas
• Zirconia alumina grain provides aggressive, long-lasting cutting action on ferrous metals
• 20 grit very coarse grade for fast stock removal and rough surface prep
• 18,145 RPM maximum rated speed compatible with standard die grinders
• 5/8-11 arbor hole thread mounts directly to common grinding spindle tooling

Compatibility

Designed as an OEM-style replacement or direct-use abrasive plug for die grinders and right-angle grinders with a 5/8-11 threaded spindle accepting Type 18R mounted point tooling.

Installation Notes

Installation and operation should be performed by a qualified technician familiar with abrasive grinding tools and applicable ANSI B11 or OSHA 1910.215 safety standards. Always inspect the plug for cracks or damage before mounting and confirm the tool spindle speed does not exceed the 18,145 RPM maximum rating. Wear appropriate PPE including eye protection and gloves. Power down and disconnect the grinder from the power source before mounting or removing the abrasive plug.