Hertel 300-001006 Combo Drill Countersink Size 4

Product Description

The HERTEL 300-001006 is a solid carbide combo drill countersink designed to drill and countersink in a single pass. Built for precision metalworking applications, this tool features a 5/16-inch body diameter, a 1/8-inch drill point diameter, and a 1/8-inch drill point length. The 60-degree included angle and plain cutting edge style deliver clean, consistent countersinks in a wide range of materials. At 2.5 inches overall length and with a right-hand cutting direction, this tool suits machinists and tool-and-die professionals working with CNC and manual machining setups where efficiency and hole quality are critical.

This combo drill countersink is suited for production and job shop environments where combining drilling and countersinking into one operation reduces cycle time and tool changes. The double end type extends usable tool life, offering two cutting ends per tool. Solid carbide construction provides superior hardness and wear resistance compared to high-speed steel, making it appropriate for harder workpiece materials and higher spindle speeds. Trade size 4 corresponds to a standard screw size designation used in precision fastener and assembly applications.

Key Features

• Solid carbide construction for superior hardness and extended tool life
• Combines drilling and countersinking in a single operation to reduce tool changes
• Double end design provides two usable cutting ends per tool
• 60-degree included angle for standard countersink geometry
• Right-hand cut with plain cutting edge style for clean material removal
• Compact 2.5-inch overall length suited for tight clearance setups

Compatibility

Designed as a standard trade size 4 combo drill countersink for use in CNC machining centers, drill presses, and manual lathes where a 5/16-inch body diameter and 60-degree countersink angle are specified.

Installation Notes

Installation and use should be performed by qualified machinists familiar with rotating cutting tool safety. Ensure the tool is securely seated and clamped in the appropriate collet or chuck before spindle operation. Power down and de-energize the machine fully before tool changes. Follow the machine manufacturer and applicable shop safety guidelines for speeds and feeds with solid carbide tooling.