Hertel SZ0020B Abrasive Bur Ball 7/16 Inch Solid Carbide

Product Description

The HERTEL SZ0020B is a solid carbide abrasive bur with a ball head profile, designed for precision material removal, deburring, and contouring in metal fabrication and machining applications. The ball-shaped cutting head measures 7/16 inch in diameter and mounts on a 1/4 inch diameter shank. The single-cut tooth style produces a smooth surface finish with efficient chip clearance, making it well suited for work on steel, cast iron, aluminum, and similar hard materials. Uncoated solid carbide construction provides durability and dimensional stability under high-speed operation.

This bur is used in die grinding, port matching, weld cleanup, and general metalworking tasks. It is commonly run in pneumatic or electric die grinders fitted with a 1/4 inch collet. The ball profile is particularly effective in contoured or recessed areas where flat or cylindrical profiles cannot reach. Machinists, tool-and-die makers, pipefitters, and fabricators are the primary installers and operators of this type of bur.

Key Features

• Ball head profile for contouring, blending, and working in concave or recessed surfaces
• 7/16 inch cutting diameter for moderate material removal in tight areas
• 1/4 inch shank diameter fits standard die grinder collets
• Solid carbide construction for extended tool life on hard metals
• Single-cut tooth style for smooth finish and efficient chip evacuation
• Uncoated head — no coating delamination risk during heavy use

Compatibility

Designed as an OEM-style replacement carbide bur for use in standard die grinders and rotary tools accepting a 1/4 inch shank, conforming to SD-4 industry specification.

Installation Notes

Installation is performed by machinists or fabricators using a die grinder with a properly sized 1/4 inch collet. Ensure the grinder is fully depowered and unplugged before inserting or removing the bur. Inspect the shank for runout or damage before each use, and do not exceed the grinder manufacturer's maximum rated RPM for this shank diameter. Eye protection and appropriate hand protection are required when operating carbide burs.