Hertel C.402.1230 Jobber Drill Bit 12.30 Mm Hss

Product Description

The HERTEL C.402.1230 is a jobber-length twist drill bit ground from high speed steel and finished with a black oxide coating. It measures 12.30 mm (0.4843 inch) in diameter and carries a standard 118-degree point angle suited to general-purpose drilling in a wide range of ferrous and non-ferrous materials. With an overall length of 149 mm and a flute length of 111 mm, the bit fits standard drill chucks and magnetic drill presses without modification. Two spiral flutes evacuate chips efficiently during right-hand cutting. This bit is intended for machinists, maintenance technicians, pipefitters, and fabricators who need a reliable general-purpose drill for everyday production or field work.

The C.402.1230 is sized for applications that fall within the 10.00 mm to 12.50 mm drill range, making it useful for clearance holes, bolt-hole layouts, and pilot drilling in structural steel, plate, tubing, and light aluminum. The straight cylindrical shank seats securely in keyed or keyless chucks on benchtop drill presses, hand drills, and CNC machining centers with compatible tooling. It is a single-piece, standard-catalog item sold individually.

Key Features

• 12.30 mm (0.4843 inch) diameter with a standard 118-degree split-free point
• High speed steel construction with black oxide finish for basic corrosion and heat resistance
• Two right-hand spiral flutes, 111 mm flute length for efficient chip evacuation
• Straight cylindrical shank for broad chuck compatibility
• General-purpose grade suitable for ferrous metals, non-ferrous metals, and plastics
• No coolant-through requirement - compatible with conventional cutting fluid application

Compatibility

Designed as a general-purpose jobber drill for use in any standard drill chuck accepting a straight cylindrical shank in the 10.00 mm to 12.50 mm size range.

Installation Notes

Installation is performed by machinists and fabricators using standard drill press or hand-drill equipment. Secure the shank fully in the chuck and verify concentricity before beginning a cut. Apply cutting fluid appropriate to the workpiece material to extend tool life and maintain hole quality. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.