Hertel C.402.0425 Jobber Drill Bit 4.25 Mm Hss

Product Description

The HERTEL C.402.0425 is a high speed steel jobber-length drill bit designed for general-purpose metal drilling in professional shop and field applications. The bit measures 4.25 mm (0.1673 inches) in diameter with an 83 mm (3.27 inches) overall length and a 54 mm (2.13 inches) flute length. The 118-degree standard point angle is the industry baseline for drilling mild steel, aluminum, brass, and similar materials. An oxide finish reduces friction and provides basic corrosion resistance during storage and use. Right-hand spiral flutes evacuate chips efficiently, helping maintain cut quality and reduce heat buildup during production drilling.

This drill bit is suited for machinists, maintenance technicians, fabricators, and industrial tradespeople who need a reliable general-purpose drill in the 4.00 mm to 5.00 mm size range. The straight-cylindrical shank fits standard drill chucks on benchtop drill presses, handheld power drills, and CNC drill stations without an adapter. It is appropriate for single-pass and repetitive drilling tasks in light manufacturing, maintenance repair operations, and job-site metalwork.

Key Features

• 4.25 mm (0.1673 inches) diameter fits the 4.00 mm to 5.00 mm general-purpose size range
• 118-degree standard point angle for drilling mild steel, aluminum, and non-ferrous metals
• High speed steel construction provides heat resistance during sustained drilling operations
• Oxide coating reduces friction and provides basic corrosion protection
• Right-hand spiral flute geometry promotes efficient chip evacuation
• Straight-cylindrical shank fits standard 3-jaw drill chucks without modification

Compatibility

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

Installation Notes

Secure the shank fully in the drill chuck and verify concentricity before drilling. Always wear appropriate eye protection and secure workpieces firmly before operation. Use cutting fluid on harder materials to extend tool life and reduce heat. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point is damaged.