Hertel 18763 Countersink 3/8 in 90 Degree 4 Flute Hss

Product Description

The HERTEL 18763 is a 4-flute high speed steel countersink designed for producing clean, accurate countersunk holes in metal and other materials. With a 3/8 inch head diameter and a 90-degree included angle, this tool is suited for standard fastener seat preparation in production and maintenance machining environments. The straight cylindrical shank measures 3/8 inch in diameter, providing solid tool holding in standard drill chucks and collet systems. Machinists, tool and die technicians, and maintenance mechanics commonly select this countersink for deburring, chamfering, and fastener recess work across a range of materials.

The HERTEL 18763 is appropriate for use in manual drill presses, CNC machining centers, and hand-held power tools where a 3/8 inch shank holder is available. The 90-degree included angle matches the seating geometry required by flat-head machine screws and standard aerospace and industrial fasteners. This tool is suited for light to medium-duty countersinking in ferrous metals, aluminum, and plastics in both shop and field maintenance applications.

Key Features

• 3/8 inch head diameter for standard fastener seat preparation
• 90-degree included angle matches common flat-head fastener geometry
• 4 flutes provide smooth cutting action and improved chip evacuation
• High speed steel construction offers good wear resistance across a range of workpiece materials
• Straight cylindrical shank fits standard drill chucks and collet toolholders

Compatibility

Designed as a standard straight-shank countersink for use in drill presses, machining centers, and hand-held power tools accepting a 3/8 inch cylindrical shank.

Installation Notes

Secure the tool firmly in a compatible chuck or collet before operation and verify runout is within acceptable limits for the application. Use appropriate cutting fluid or lubricant when countersinking ferrous metals to extend tool life and improve finish quality. Always power down and lock out the machine before changing or adjusting tooling. Follow applicable shop safety practices and machine manufacturer guidelines for speed and feed selection.