Hertel 84578210 Jobber Drill Bit Wire 66 Hss

Product Description

The HERTEL 84578210 is a wire gauge size 66 jobber length drill bit manufactured from high speed steel with a bright uncoated finish. At 0.0330 inches in diameter and 1.375 inches overall length, this bit is designed for precision drilling in tight-tolerance applications where small-diameter hole generation is required. The 118-degree standard point angle provides a self-centering entry that suits general purpose work across a broad range of base materials. The two-flute spiral geometry with a tapered, web-thinned web configuration helps reduce thrust force and promotes chip evacuation during the cut. Licensed trades and machining professionals install this bit in standard drill chucks for light-duty, small-hole work.

This bit is suited for general purpose drilling in ferrous and non-ferrous materials in both shop and field environments. The straight-cylindrical shank fits conventional three-jaw drill chucks without the need for special tooling holders. The regular spiral and right-hand cut make it compatible with standard handheld drills, drill presses, and CNC drilling operations where wire gauge sizing is specified. Typical applications include sheet metal, light steel plate, aluminum, brass, and plastic. The 0.5-inch flute length accommodates shallow-to-moderate depth passes at this diameter range.

Key Features

• Wire gauge size 66 — 0.0330-inch decimal diameter for precision small-bore drilling
• High speed steel construction for durability across general purpose materials
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Right-hand cut, two-flute spiral design promotes chip evacuation
• Bright uncoated finish — no added coating that could affect hole tolerance at small diameters
• Straight-cylindrical shank fits standard three-jaw drill chucks

Compatibility

Designed as a general purpose jobber length drill bit for use in standard three-jaw drill chucks accepting a 0.0330-inch straight-cylindrical shank, compatible with handheld drills, benchtop drill presses, and CNC drilling equipment specifying wire gauge tooling.

Installation Notes

Secure the shank fully in the drill chuck and verify runout before beginning the operation. At small diameters like this, excessive feed pressure increases the risk of bit breakage — use light, consistent feed force and allow the flutes to clear chips. Ensure the workpiece is firmly clamped or fixtured before drilling. Follow applicable shop safety standards and wear appropriate eye protection during all drilling operations.