Hertel 61699526 Screw Machine Drill Bit 0.413 in Hss

Product Description

The HERTEL 61699526 is a screw machine length drill bit designed for general-purpose drilling in metal, plastic, and similar materials. Built from high speed steel with an oxide finish, it offers adequate hardness and wear resistance for production and maintenance drilling applications. The bit measures 0.413 inches (Letter Size Z) in diameter with a 118-degree standard point angle, a 2-flute regular spiral flute configuration, and a straight-cylindrical shank for use in standard drill chucks and screw machine spindles. The shorter-than-jobber flute length increases rigidity, reducing deflection in close-tolerance or high-feed operations. Licensed machinists, tool-and-die technicians, and maintenance mechanics are the primary users.

This bit is suited for screw machine work, turret lathe operations, CNC drilling centers, and bench drill press applications where a short, rigid bit is preferred over jobber length. The 2-inch flute length handles typical through-hole and blind-hole depths encountered in light to medium production runs. The straight-cylindrical shank seats directly in three-jaw chucks or collets without additional adapters. General-purpose grade construction makes this an appropriate choice for carbon steel, aluminum, brass, and thermoplastic workpieces in both shop and field maintenance settings.

Key Features

• 0.413-inch diameter, Letter Size Z, within the 0.4000 to 0.4500 inch size range
• High speed steel construction with oxide finish for basic lubricity and corrosion resistance
• 118-degree standard point angle suits a wide range of common materials
• 2-flute regular spiral design promotes chip evacuation in moderate-feed drilling
• Short screw machine length (3.375 inches overall, 2-inch flute) improves rigidity and reduces runout
• Straight-cylindrical shank fits standard drill chucks and collets without adapters
• ANSI specification designation confirms dimensional compliance

Compatibility

Designed as an OEM-style general-purpose screw machine length drill bit compatible with standard drill chucks, collets, and turret lathe tooling that accept a straight-cylindrical shank in the 0.413-inch diameter range.

Installation Notes

Install in a properly sized drill chuck or collet and tighten securely before operation. Ensure the workpiece is clamped or fixtured to prevent rotation during drilling. Apply appropriate cutting fluid for the workpiece material to extend bit life and improve hole finish. Inspect the cutting edges for wear or chipping before each use and replace the bit when point geometry degrades to avoid oversized or out-of-round holes.