Hertel 331-010050 Countersink 1 in 60 Degree 1 Flute Alloy Steel

Product Description

The HERTEL 331-010050 is a single-flute countersink designed for precision countersinking operations in alloy steel, cast iron, and glass-reinforced plastic. The tool features a 1-inch head diameter, a 60-degree included angle, and a 0.5-inch straight cylindrical shank. The bright, uncoated finish indicates no additional coating treatment, preserving the base alloy steel cutting geometry. Weighing 0.4 pounds, this countersink is built for right-hand cutting and is suited for machinists, tool-and-die technicians, and fabricators requiring clean, accurate seat profiles in hard or abrasive materials.

This countersink is used in metalworking and fabrication environments where countersunk fastener seats must be produced to consistent angular tolerances. The 60-degree included angle suits applications requiring shallower seat profiles compared to standard 82-degree or 90-degree countersinks. Typical install scenarios include bench work, drill press operations, and CNC or manual milling setups where the 0.5-inch shank fits standard collet or chuck sizes. The single-flute design reduces chatter and provides a cleaner finish on harder base materials such as alloy steel and cast iron.

Key Features

• 1-inch head diameter for full-seat countersinking in a single pass
• 60-degree included angle produces shallow countersunk profiles
• Single-flute geometry minimizes chatter on hard materials
• Right-hand cutting direction for standard drill and mill spindle compatibility
• Straight cylindrical 0.5-inch shank fits common collets and chucks
• Suitable for alloy steel, cast iron, and glass-reinforced plastic applications

Compatibility

Designed for use in materials including alloy steel, cast iron, and glass-reinforced plastic. Compatible with any drill press, manual mill, or CNC setup accepting a 0.5-inch straight cylindrical shank. No pilot included.

Installation Notes

Installation and use should be performed by qualified machinists or fabricators familiar with metal-cutting tooling. Secure the 0.5-inch shank firmly in a collet or chuck before operation and verify spindle runout is within acceptable limits to protect the cutting edge. Power down and lock out the machine spindle before changing or inspecting the tool. Do not use this countersink on materials outside the rated application list, as doing so may damage the cutting geometry or workpiece.