Hertel C.402.0440 Jobber Drill Bit 4.40 Mm Hss

Product Description

The HERTEL C.402.0440 is a high speed steel jobber-length drill bit designed for general-purpose drilling in metal, wood, and plastic. It measures 4.40 mm (0.1732 inches) in diameter with an overall length of 86 mm and a flute length of 56 mm. The standard 118-degree split-free point geometry delivers consistent, centered starts on flat and curved surfaces. An oxide coating reduces friction and provides light corrosion resistance during service. This drill is a staple in any machinist, maintenance technician, or fabrication shop where accurate, repeatable hole sizing is required.

The C.402.0440 is suited for light to medium drilling operations in general manufacturing, maintenance and repair, and fabrication environments. The 4.40 mm diameter falls within the 4.00 mm to 5.00 mm size range and is commonly used to produce clearance holes, pilot holes, or finish holes in ferrous and non-ferrous materials. The straight-cylindrical shank fits standard drill chucks on benchtop drill presses, hand drills, and CNC machines equipped with a compatible chuck or collet system.

Key Features

• 4.40 mm (0.1732 inch) diameter for precise hole sizing
• 118-degree standard point angle for general-purpose material entry
• High speed steel construction provides durability across a wide range of workpiece materials
• Oxide coating reduces friction and extends tool life in light-duty applications
• Two-flute spiral design promotes efficient chip evacuation
• Right-hand cutting direction compatible with standard drill chucks and spindles

Compatibility

Designed as a general-purpose jobber drill compatible with any standard drill chuck or collet accepting a straight-cylindrical shank in the 4.00 mm to 5.00 mm diameter range.

Installation Notes

Installation and use of this drill bit is performed by machinists, maintenance technicians, and fabricators using standard drill presses, hand drills, or CNC equipment. Secure the straight-cylindrical shank firmly in a properly sized chuck before operation and verify chuck key removal before starting the spindle. Use appropriate cutting fluid or coolant for the workpiece material to maintain bit temperature and edge life. Inspect the cutting edges for wear or chipping before each use and replace when point geometry is compromised.