Hertel SZ20025C Abrasive Bur SJ-1 Cone 1/4 Inch Shank

Product Description

The HERTEL SZ20025C is a solid carbide abrasive bur in the SJ-1 industry specification, featuring a cone (taper) head shape with a 60-degree included angle. Designed for precision material removal and deburring, this bur is single cut, making it well suited for ferrous metals, aluminum, and hard plastics where controlled stock removal and smooth finishing are required. The 1/4 inch shank fits standard die grinders and rotary tools used across fabrication, maintenance, and tool-and-die applications. At 0.045 pounds, it is a compact, single-piece consumable kept on hand for production and repair work alike.

This bur is used in metalworking, fabrication shops, and maintenance environments where internal contours, chamfers, and conical surfaces must be shaped or deburred. The cone geometry and 60-degree included angle make it especially useful for countersinking, deburring drilled holes, and working in confined angled passages. It is commonly installed — or rather, loaded — into pneumatic or electric die grinders by machinists, pipefitters, welders, and general maintenance technicians working on metal components requiring fine surface prep.

Key Features

• SJ-1 industry specification cone bur with 60-degree included angle for precise angular material removal
• Solid carbide head construction provides hardness and wear resistance well above high-speed steel alternatives
• Single cut tooth style delivers smooth finishes with controlled chip flow on ferrous and non-ferrous metals
• 1/4 inch shank diameter fits standard die grinders, flex shafts, and compatible rotary tools
• 3/16 inch length of cut and 1/4 inch cutting diameter suited for detail work and confined access areas
• Uncoated head — no coating degradation risk; solid carbide substrate exposed for full service life

Compatibility

Designed as a standard SJ-1 specification replacement bur for use in any die grinder or rotary tool accepting a 1/4 inch round shank carbide bur.

Installation Notes

Loading and unloading carbide burs should be performed with the grinder fully powered off and the collet completely released before inserting the shank. Ensure the collet nut is tightened to the tool manufacturer specification before operating. Carbide is brittle — avoid lateral prying loads or impact against hardened surfaces. Eye protection is required during operation per standard shop safety practice.