Hertel 2387397 Screw Machine Drill Bit Size 22 Tin Hss

Product Description

The HERTEL 2387397 is a screw machine length drill bit designed for high-speed steel cutting applications where shorter overall length and increased rigidity are required. Sized at wire gauge No. 22 (0.1570 inches decimal equivalent), it features a 135-degree split point for fast, self-centering starts with reduced thrust. The titanium nitride (TiN) coating extends tool life by increasing surface hardness and reducing friction. At 2.125 inches overall length, this stub-style bit fits compact drilling setups, drill presses, and CNC turret applications common in production and fabrication environments. A web-thinned construction improves chip evacuation during through-hole drilling.

This bit is suited for production drilling in metals, plastics, and similar materials where a screw machine length format is preferred over jobber-length tooling. The straight-cylindrical shank accommodates standard three-jaw chucks and collet holders. The regular spiral flute and parallel web configuration make it appropriate for moderate-feed drilling in both manual and automated setups. Machinists, toolroom technicians, and fabricators working in small-hole, high-volume applications will find this format reduces deflection and breakage compared to longer drill styles.

Key Features

• Wire gauge No. 22 size — 0.1570 inch decimal equivalent diameter
• 135-degree split point for self-centering entry and reduced thrust load
• TiN coating increases surface hardness and extends cutting life
• Web-thinned, parallel web construction promotes chip clearance
• Screw machine (stub) length at 2.125 inches OAL reduces deflection in tight setups
• Right-hand cutting, regular spiral flute with straight-cylindrical shank

Compatibility

Designed as a direct-use screw machine length drill bit compatible with standard three-jaw chucks and collet holders accepting a 0.1570-inch straight-cylindrical shank.

Installation Notes

Installation and use should follow standard machine shop practice for rotating cutting tools. Secure the shank fully in the chuck or collet before operation and verify runout before production use. Always wear appropriate eye protection and follow the machine manufacturer's recommended feed and speed guidelines for the workpiece material. Inspect the cutting edges and TiN coating for wear or chipping before each use; replace when performance degrades to avoid workpiece damage.