Hertel 83238899 Screw Machine Drill Bit Letter T Hss

Product Description

The HERTEL 83238899 is a screw machine length drill bit sized at Letter T (0.3580 inch decimal equivalent) and built from high-speed steel with an oxide coating for added wear resistance. The 135-degree split point geometry reduces walking on entry and lowers the thrust needed to start a hole, making it well-suited for production drilling in metal and other hard materials. The web-thinned, parallel-web construction further reduces cutting resistance. At 3-1/16 inches overall length, this short-length drill is designed to maximize rigidity and minimize deflection in tight or confined drilling setups.

This bit is intended for use in screw machine operations, CNC machining centers, drill presses, and hand-held power drilling applications where a shorter, stiffer drill body is required. The straight-cylindrical shank fits standard drill chucks without an adapter. Its heavy-duty grade rating makes it appropriate for repetitive production runs in ferrous metals, alloy steels, and similar materials. Machinists, tool-and-die workers, and maintenance technicians in industrial and manufacturing environments are the primary users of this drill bit.

Key Features

• Letter T size with 0.3580 inch decimal equivalent for precise hole sizing
• 135-degree split point reduces walking and lowers drilling thrust
• Web-thinned, parallel-web design decreases cutting resistance
• High-speed steel construction with oxide finish for wear resistance
• Screw machine (stub) length provides maximum rigidity and reduced deflection
• Right-hand spiral flute with straight-cylindrical shank for standard chuck compatibility
• Meets NAS 907 specification

Compatibility

Designed as a screw machine length replacement drill bit for standard straight-shank drill chucks across CNC lathes, screw machines, drill presses, and hand-held drilling equipment accepting a 0.3580 inch shank diameter.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance technicians familiar with cutting tool safety. Ensure the drill chuck is fully tightened and the workpiece is securely clamped before operation. Always operate within the recommended RPM range for the workpiece material and drill diameter. Inspect the cutting edges before each use and replace if chipping or excessive wear is observed.