Hertel C.401.0023 Jobber Drill Bit 0.23 Mm Hss

Product Description

The HERTEL C.401.0023 is a micro-diameter jobber-length drill bit designed for precision drilling in light metalworking, electronics, and instrument fabrication applications. Ground from high speed steel (HSS) with a bright, uncoated finish, it features a standard 118-degree split point and a right-hand spiral flute configuration. The straight-cylindrical shank seats directly into standard collet chucks and drill press spindles. At 0.23 mm in diameter and 19 mm overall length, this bit is suited for operations requiring tight positional accuracy and clean entry holes in thin or soft substrates.

This jobber drill is used in general-purpose drilling where small, precise hole diameters are required. Typical applications include printed circuit board work, watchmaking, instrument assembly, and fine metalwork in both shop and field settings. The 2-flute spiral design promotes chip evacuation in shallow-depth drilling passes. Machinists and tool-and-die technicians working with micro-diameter tooling will find this bit fits standard CNC, benchtop drill press, and hand-held rotary tool setups with appropriate collet sizing.

Key Features

• 0.23 mm diameter (0.0091 inch decimal equivalent) for micro-precision drilling
• 118-degree standard point angle for general-purpose entry into soft to medium-hard materials
• High speed steel construction provides adequate hardness and toughness for repetitive use
• Bright, uncoated finish allows visual wear inspection between uses
• Right-hand cutting, 2-flute spiral design promotes chip clearance in shallow holes
• Straight-cylindrical shank compatible with standard collet chucks and drill presses

Compatibility

Designed as a general-purpose jobber drill for use in standard collet chucks and spindles accepting straight-cylindrical shanks in the micro-diameter range of 0.00 mm to 2.00 mm.

Installation Notes

Installation and use of micro-diameter drill bits should be performed by machinists or technicians familiar with small-tooling practices. Ensure the collet or chuck is properly sized and securely tightened before operation to prevent bit slippage or breakage. Reduce spindle speed and feed pressure compared to standard drill bits, as micro-diameter tooling is highly susceptible to breakage under side-load or excessive feed force. Always wear appropriate eye protection when operating rotary cutting tools.