Hertel 84578160 Jobber Drill Bit Wire 61 Hss 118 Deg

Product Description

The HERTEL 84578160 is a jobber-length drill bit sized to wire gauge No. 61, with a decimal diameter of 0.0390 inches. It is manufactured from high speed steel with a bright, uncoated finish. The bit features a 118-degree standard point angle, a two-flute right-hand spiral configuration, and a straight-cylindrical shank of matching 0.0390-inch diameter. Overall length is 1.625 inches, with a flute length of 0.6875 inches. The web is thinned and tapered for improved chip clearance and reduced entry force. Intended for general-purpose drilling applications, this bit is installed and used by machinists, maintenance technicians, and trade professionals working with small-diameter hole requirements.

This drill bit is suited for general-purpose drilling in light metals, plastics, and similar materials where small-diameter precision is required. Its jobber-length profile makes it a standard choice for bench drill presses, hand drills, and CNC operations where a compact, rigid bit is appropriate. The wire gauge No. 61 size falls within the 0.0000 to 0.0500 inch range, making it applicable for tapping pilot holes, instrument work, and fine-tolerance assembly tasks common in HVAC, electrical, and light fabrication trades.

Key Features

• Wire size No. 61 with 0.0390 inch decimal diameter for fine-tolerance drilling
• 118-degree standard point angle for general-purpose material entry
• High speed steel construction provides durability across common work materials
• Bright uncoated finish suitable for standard shop use without added coating wear concerns
• Two-flute right-hand spiral with tapered, web-thinned configuration for improved chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard drill chucks accommodating straight-cylindrical shanks at 0.0390 inch diameter.

Installation Notes

Installation of this bit requires a drill chuck rated for the 0.0390-inch shank diameter. Ensure the drill press or hand drill is powered off and secured before changing bits. Use appropriate cutting fluid or dry-run technique based on workpiece material. Handle small-diameter bits with care to avoid flexing or snapping under side load.