Hertel 336-011070 Countersink 1-1/4 in 90 Deg 6 Flute Carbide

Product Description

The HERTEL 336-011070 is a solid carbide countersink designed for precision countersinking operations in metal, composite, and other hard materials. It features a 1-1/4 inch head diameter, a 90-degree included angle (45-degree centerline angle), and 6 flutes that promote smooth chip evacuation and a clean, chatter-free finish. The 3/4 inch straight-cylindrical shank provides a secure, concentric grip in standard drill press or CNC machine tool holders. This tool ships in a bright, uncoated finish and is configured for right-hand cutting. Machinists and tooling technicians working in production or job-shop environments will find this countersink suited for high-volume or precision applications.

This countersink is appropriate for creating chamfered seating surfaces for flat-head fasteners in ferrous and non-ferrous materials. The 90-degree included angle is the standard angle for most inch-series flat-head machine screws and bolts per ASME standards. With no pilot and a single-end configuration, it is intended for use in machine setups where the operator controls depth and alignment through the workholding fixture or CNC program rather than a pilot pin. Typical applications include aerospace, automotive, general manufacturing, and maintenance shops requiring consistent countersink geometry.

Key Features

• 1-1/4 inch head diameter for larger fastener clearances and spot-facing applications
• 90-degree included angle matches standard inch-series flat-head fastener geometry
• 6-flute design reduces chatter and improves surface finish compared to lower-flute-count tools
• Solid carbide construction for extended tool life in hard or abrasive materials
• 3/4 inch straight-cylindrical shank fits standard collets and end mill holders
• Bright, uncoated finish — ready for use or compatible with aftermarket coating if desired

Compatibility

Designed as a machine-held countersink compatible with drill presses, milling machines, and CNC machining centers equipped with a 3/4 inch collet or end mill holder. No specific OEM machine model compatibility was stated in the product data.

Installation Notes

This tool is installed by a machinist or tooling technician into a 3/4 inch collet or tool holder; ensure the shank is fully seated and the holder is torqued to the machine manufacturer's specification before operation. Power down and lock out the spindle before changing or inspecting the tool. Do not use this countersink as a drill — it is intended for countersinking only and is not rated for axial drilling loads. Follow applicable shop safety standards and machine guarding requirements during operation.