Hertel 19311 Countersink 1/2 in 82 Degree 6 Flute Hss

Product Description

The HERTEL 19311 is a 6-flute high speed steel countersink designed for producing clean, accurately angled seat profiles in metal, plastic, and composite materials. With a 1/2 inch head diameter and an 82-degree included angle, it is suited for seating flat-head fasteners to a flush finish in precision machining and fabrication work. The straight-cylindrical shank measures 1/4 inch in diameter and 1 inch in length, fitting standard drill chucks and collet holders commonly found in machine shops and production environments. This tool is typically used by machinists, toolmakers, and maintenance technicians performing drilling and fastener-prep operations.

The HERTEL 19311 countersink is appropriate for bench drill press, milling machine, and CNC applications where consistent chamfer geometry is required. Its 82-degree angle is a standard specification for flat-head machine screws used in aerospace, industrial, and general metalworking applications. The 6-flute design reduces chatter and produces smoother surface finishes compared to single- or three-flute alternatives, making it a practical choice for production runs and close-tolerance work on ferrous and non-ferrous materials.

Key Features

• 82-degree included angle matches standard flat-head fastener geometry for flush seating
• 6-flute configuration minimizes chatter and improves surface finish quality
• High speed steel construction provides durability across a range of workpiece materials
• 1/4 inch straight-cylindrical shank fits standard drill chucks and collet holders
• 1/2 inch head diameter accommodates common flat-head screw sizes in production and repair work

Compatibility

Designed as a standard straight-shank countersink compatible with drill presses, milling machines, and CNC equipment accepting a 1/4 inch straight-cylindrical shank.

Installation Notes

Countersinks should be installed by a qualified machinist or toolmaker familiar with cutting tool setup and speeds. Secure the shank fully in the chuck or collet before operation and verify runout before beginning a cut. Use appropriate cutting speed and feed rate for the workpiece material to avoid tool deflection or premature wear. Always power down and lock out the machine spindle before changing or inspecting the tool.