Hertel 2385847 Screw Machine Drill Bit 1/8 in Hss

Product Description

The HERTEL 2385847 is a screw machine length drill bit designed for high-volume, close-tolerance drilling in metal fabrication, maintenance, and production environments. Built from high-speed steel with an oxide coating for added lubricity and mild corrosion resistance, this bit features a 135-degree split point that reduces walking and requires less feed pressure at startup. The 1/8 inch diameter and short 1-7/8 inch overall length make it well suited for drill press and CNC turret work where rigidity and precision matter. Licensed machinists, toolroom techs, and maintenance mechanics are the primary installers of this type of tooling.

This drill bit is used in screw machine operations, turret lathes, drill presses, and hand-held power drills where a stub-length bit provides better rigidity than a jobber-length equivalent. The short flute length of 7/8 inch limits chip packing and deflection when drilling steel, cast iron, aluminum, and similar materials at high cycle rates. Typical applications include production drilling in metal shops and general maintenance repair work on mechanical equipment across industrial and commercial facilities.

Key Features

• 1/8 inch diameter with 0.1250 decimal inch sizing for precise fit in standard chucks and collets
• 135-degree split point reduces drill walking and lowers required feed force on entry
• Web-thinned parallel web construction reduces thrust and extends bit life in production use
• Oxide coating provides mild lubricity and surface protection during drilling
• Short screw machine length overall length of 1-7/8 inches increases rigidity and reduces deflection
• Right-hand spiral flute with straight-cylindrical shank fits standard three-jaw and keyless chucks

Compatibility

Designed as an OEM-style replacement screw machine length drill bit suitable for standard straight-cylindrical shank chucks and collet systems accepting a 1/8 inch diameter bit.

Installation Notes

This bit is installed by machinists and maintenance mechanics using standard drill press, CNC turret, or hand-held power tool chucks. Ensure the chuck or collet is fully secured and the workpiece is clamped before beginning drilling operations. Use appropriate cutting fluid for ferrous materials to extend tool life and maintain finish quality. Inspect the bit for wear or chipping before each use and replace at the first sign of tip degradation.