Hertel SZ20011C Carbide Bur Cone Double Cut 1/4 in

Product Description

The HERTEL SZ20011C is a solid carbide abrasive rotary bur in a cone-with-point-end geometry, conforming to SM-51 industry specification. It features a double-cut tooth pattern that aggressively removes material while leaving a relatively smooth surface finish. The 1/4-inch cutting diameter and 1/2-inch length of cut make it well suited for deburring, grinding, and shaping operations in tight or contoured work areas. The 1/8-inch shank fits standard die grinders and rotary tool collets. Machinists, toolmakers, and maintenance technicians reach for this bur when working on hardened steel, cast iron, and similar ferrous and non-ferrous materials.

This bur is used in metalworking, fabrication, and maintenance-repair applications where precise material removal in confined geometry is required. The cone-with-point profile allows access into drilled holes, V-grooves, countersinks, and angular recesses. It is appropriate for use in tool and die shops, weld prep, port work on engine components, and general deburring on machined parts. The double-cut flute pattern suits both roughing passes and moderate finishing work depending on feed rate and spindle speed.

Key Features

• SM-51 industry specification compliance for standardized geometry and interchangeability
• Cone with point end profile for access into grooves, holes, and angled recesses
• Double-cut tooth style for efficient material removal with reduced chatter
• Solid carbide head construction for hardness and wear resistance
• Uncoated head for direct inspection of cutting edge condition
• 1/8-inch shank diameter compatible with standard die grinder collets

Compatibility

Designed as a direct SM-51 specification replacement carbide bur for use in any die grinder, rotary tool, or flex-shaft machine accepting a 1/8-inch shank collet.

Installation Notes

Installation is performed by a machinist or toolroom technician using a die grinder or rotary tool with the appropriate 1/8-inch collet. Ensure the machine is fully powered down and unplugged before changing burs. Seat the shank fully into the collet and tighten the collet nut securely before operation. Always wear eye protection and confirm the workpiece is properly secured before engaging the bur.