Hertel SZ0021B Abrasive Bur Ball 1/2 in Solid Carbide

Product Description

The HERTEL SZ0021B is a solid carbide abrasive bur with a ball head shape, designed for deburring, shaping, and material removal in metal fabrication and machining applications. Built to industry specification SD-5, it features a 1/2-inch cutting diameter and a 1/4-inch shank diameter. The single-cut tooth style provides controlled material removal with reduced chatter, making it well suited for ferrous and non-ferrous metals, hardened steel, and cast iron. Licensed machinists, tool-and-die makers, and skilled tradespeople use this bur with die grinders and rotary tools for precision finishing work.

This bur is appropriate for use in industrial, manufacturing, and heavy fabrication environments where consistent stock removal and surface refinement are required. The ball profile is particularly effective for concave surface blending, port matching, and weld cleanup in tight or curved geometries. It is sold individually and ships in a single-piece package.

Key Features

• Ball head shape for concave surface work, port matching, and weld cleanup
• Solid carbide construction provides hardness and wear resistance compared to high-speed steel alternatives
• Single-cut tooth style for smooth, controlled material removal
• 1/4-inch shank fits standard die grinder and rotary tool collets
• Uncoated head — no coating delamination risk in high-heat applications
• Meets industry specification SD-5

Compatibility

Designed for use with die grinders and rotary tools accepting a 1/4-inch shank collet. Suitable for deburring, grinding, and shaping operations on ferrous metals, non-ferrous metals, and hardened materials consistent with SD-5 specification bur applications.

Installation Notes

Install and remove burs only when the die grinder or rotary tool is fully powered down and unplugged or air supply is isolated. Ensure the collet and shank are clean and free of debris before seating the 1/4-inch shank. Always confirm the tool RPM rating meets or exceeds the bur manufacturer recommendation before operation. Wear appropriate PPE including eye protection and gloves when operating rotary cutting tools.