Hertel 61699567 Screw Machine Drill Bit Letter X Hss

Product Description

The HERTEL 61699567 is a screw machine length drill bit designed for general-purpose drilling in metal, wood, and plastic. Built from high speed steel with an oxide finish, this bit delivers consistent performance in short-coupled drilling applications where stub length rigidity matters. The 118-degree point angle is the standard geometry for most production drilling work. With a 0.397-inch diameter and a straight-cylindrical shank, it seats securely in standard drill chucks and quick-change holders. At 3-5/16 inches overall length with a 1-15/16-inch flute length, this bit is suited for use in drill presses, CNC mills, and hand-held power drills where a shorter tool length reduces deflection and improves hole accuracy.

This bit is sized to Letter X, placing it in the 0.3500- to 0.4000-inch decimal inch range. Screw machine length bits are commonly used in machining, fabrication, maintenance, and repair environments where shorter tool reach is preferred over jobber length. The right-hand spiral flute design efficiently evacuates chips during drilling. This size is frequently used when drilling clearance or tap-relief holes in steel plate, aluminum extrusions, and structural components.

Key Features

• Letter X size: 0.397 inches diameter for precise decimal-inch fit
• High speed steel construction with oxide finish for general-purpose durability
• 118-degree standard point angle for broad material compatibility
• Screw machine length body reduces deflection compared to jobber length bits
• Right-hand, 2-flute spiral design promotes efficient chip evacuation
• Straight-cylindrical shank fits standard drill chucks and quick-change systems

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard drill chucks and quick-change tool holders accepting straight-cylindrical shanks in the 0.397-inch diameter class.

Installation Notes

This bit is installed and replaced by machinists, fabricators, and maintenance technicians using standard drill chuck keys or quick-change systems. Secure the shank fully in the chuck before operation and confirm the workpiece is properly fixtured or clamped. Use appropriate cutting fluid for ferrous materials to extend tool life and improve hole finish. Inspect the cutting edges before each use and replace the bit if chipping or dulling is evident.