Hertel C.402.0140 Jobber Drill Bit 1.40 Mm Hss

Product Description

The HERTEL C.402.0140 is a high speed steel jobber-length drill bit designed for general-purpose drilling in metal, wood, plastic, and similar materials. It features a 118-degree standard point angle and a spiral flute geometry that promotes chip evacuation and consistent hole entry. The oxide coating provides a modest layer of surface protection against corrosion and moderate heat. At 1.40 mm in diameter and 48 mm overall length, this bit is suited to precision drilling work where tight tolerances and small bore diameters are required. Machinists, toolroom technicians, and maintenance professionals are the primary users.

This bit is sized at 1.40 mm, equivalent to approximately 0.0551 decimal inches, placing it in the small-diameter range commonly used for pilot holes, circuit board work, instrument assemblies, and fine metalworking applications. Its straight-cylindrical shank fits standard drill chucks on bench drills, CNC drilling centers, and handheld power tools. The right-hand cutting direction is compatible with conventional forward-rotation spindles found on the vast majority of drilling equipment in trade and shop environments.

Key Features

• 1.40 mm diameter with 118-degree standard point for clean entry on a wide range of materials
• High speed steel construction offers durability across general-purpose drilling applications
• Oxide coating provides corrosion resistance and mild heat protection
• Spiral flute design with two flutes promotes efficient chip removal
• Straight-cylindrical shank fits standard drill chucks without adapters
• Right-hand cutting direction compatible with conventional forward-rotation spindles

Compatibility

Designed as a general-purpose jobber drill bit suitable for use in standard drill chucks accepting straight-cylindrical shanks across bench drills, drill presses, and CNC drilling equipment.

Installation Notes

Install and remove drill bits only with the spindle fully stopped and the machine power off or locked out per standard OSHA lockout/tagout procedures. Secure the straight-cylindrical shank firmly in the chuck and verify concentricity before initiating a cut. Use appropriate cutting fluid or coolant for metal drilling to extend bit life, especially at high spindle speeds with small-diameter bits. Inspect the cutting edges for wear or chipping before each use, as small-diameter HSS bits are susceptible to breakage under side load or excessive feed pressure.