Hertel 2387488 Screw Machine Drill Bit Size 31 Tin Hss

Product Description

The HERTEL 2387488 is a screw machine length drill bit designed for high-speed, close-tolerance drilling in metal fabrication and machining applications. Built from high-speed steel (HSS) with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction during cutting. The bit measures 0.1200 inches in diameter (Wire Size 31) with a 1-7/8 inch overall length, making it well-suited for work in tight spaces or on short-travel drilling setups. The 135-degree split point and web-thinned geometry reduce thrust requirements and help the bit self-center without a pilot hole, improving accuracy on ferrous and non-ferrous materials.

This bit is used in production machining, screw machine operations, and general metalworking environments where a shorter flute length and stub-length body improve rigidity and control. The straight-cylindrical shank accepts standard drill chucks and collet holders. Typical applications include drilling in steel, aluminum, cast iron, and similar materials where tool runout and bit deflection must be minimized. The regular spiral flute and parallel web configuration support consistent chip evacuation during through-hole and blind-hole operations.

Key Features

• Wire Size 31 diameter: 0.1200 inches for precision small-diameter drilling
• TiN coating extends cutting life and reduces heat buildup at the cutting edge
• 135-degree split point with web thinning reduces thrust and eliminates need for center punch on most metals
• Screw machine (stub) length body at 1-7/8 inches OAL increases rigidity and minimizes deflection
• Right-hand spiral flute with parallel web promotes smooth chip evacuation
• Straight-cylindrical shank fits standard drill chucks and collet holders without modification

Compatibility

Designed as an OEM-style replacement or direct-use drill bit for standard drill chucks and collet systems accepting a 0.1200 inch straight-cylindrical shank, suitable for bench drills, CNC machining centers, and screw machines.

Installation Notes

This bit is installed and changed by machinists or maintenance technicians using standard chuck keys or collet wrenches. Always power down and lock out the spindle before changing tooling. Verify chuck runout before drilling to avoid premature edge wear on small-diameter bits. Do not exceed the recommended feed and speed ratings for the workpiece material and bit diameter.