Harvey Tool 890916-C3 Carbide Bur Ball 0.25 in Altin

Product Description

The HARVEY TOOL 890916-C3 is a double-cut carbide abrasive bur with a ball (sphere) head shape, designed for aggressive material removal in metalworking and fabrication applications. The cutting head is manufactured from solid carbide and finished with an AlTiN (Aluminum Titanium Nitride) coating, which extends tool life and maintains cutting performance at elevated temperatures. The cutting diameter measures 0.25 inches, with a length of cut of 0.213 inches and an overall length of 2.5 inches. The 0.25-inch shank fits standard die grinders and rotary tools. This bur is used by machinists, tool-and-die makers, welders, and fabricators working with hard ferrous materials.

The 890916-C3 is suited for deburring, contouring, and cavity work on cast iron, steel, and stainless steel. The ball head geometry and 270-degree included angle allow access to concave surfaces, internal radii, and hard-to-reach workpiece features. The double-cut tooth pattern removes material efficiently while producing a smoother finish than single-cut styles. Typical applications include weld cleanup, port work, and mold finishing in both production shop and maintenance environments.

Key Features

• Ball (sphere) head shape with 270-degree included angle for concave surface access
• Double-cut tooth style for fast stock removal and smoother surface finish
• Solid carbide head construction for hardness and wear resistance
• AlTiN coating extends tool life on ferrous materials including stainless steel
• 0.25-inch shank diameter fits standard die grinder collets
• Rated for cast iron, steel, and stainless steel applications

Compatibility

Designed for use in standard 0.25-inch collet die grinders and rotary tool holders. Rated for material applications including cast iron, steel, and stainless steel per manufacturer specification.

Installation Notes

Installation is performed by machinists or fabricators using a die grinder or rotary tool with a compatible 0.25-inch collet. Ensure the workpiece is secured and the tool is fully seated and tightened in the collet before operating. Always wear appropriate eye and face protection when operating rotary abrasive tooling. Do not exceed the maximum RPM rating of the die grinder or the bur.