Hertel 89321418 Screw Machine Drill Bit Wire 12 Hss

Product Description

The HERTEL 89321418 is a screw machine length drill bit designed for general-purpose drilling in metal, wood, and plastic. It is manufactured from high-speed steel (HSS) and carries a bright/uncoated finish, making it well suited for standard production and maintenance drilling applications. The wire size 12 designation corresponds to a decimal diameter of 0.1890 inches. The 118-degree split point angle provides reliable self-centering on most materials without a center punch. At 2.25 inches overall length, this stub-length geometry delivers added rigidity compared to jobber-length bits, reducing deflection in short-setup drilling operations. Licensed tradespeople and shop machinists commonly select this format for drill press, turret lathe, and CNC work.

This drill bit fits into general-purpose drilling workflows wherever a compact, rigid bit is preferred over standard jobber length. Typical applications include sheet metal fabrication, fixture work, and repetitive-hole production in light steel, aluminum, brass, and thermoplastics. The right-hand cutting direction is compatible with conventional drill press and hand-drill spindle rotation. Wire size 12 falls within the 0.1500 to 0.2000 inch decimal range, making it a common selection for tapping prep and close-tolerance hole work at this diameter.

Key Features

• Wire size 12 cutting diameter: 0.1890 inches decimal equivalent
• 118-degree drill point angle for general-purpose self-centering entry
• High-speed steel construction for durability across common workpiece materials
• Bright/uncoated finish — no coating buildup to affect hole tolerance
• Screw machine (stub) length at 2.25 inches OAL provides increased rigidity and reduced deflection
• Right-hand cut compatible with standard drill press and hand-drill rotation

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard 3-jaw drill chucks and collet systems accepting round-shank bits at 0.1890 inch diameter.

Installation Notes

This bit is installed by a machinist or maintenance technician using a standard drill press, lathe turret, or hand drill with an appropriate chuck. Secure the shank fully in the chuck before operation and verify spindle speed is appropriate for the workpiece material and bit diameter. Inspect the cutting edges for wear or chipping before each use; a dull or damaged bit should be replaced or resharpened before continuing work. Always use appropriate cutting fluid when drilling ferrous metals to extend tool life and maintain hole quality.