Hertel C.402.1120 Jobber Drill Bit 11.20 Mm Hss

Product Description

The HERTEL C.402.1120 is a jobber-length drill bit designed for general-purpose drilling in metal, wood, and plastic. It measures 11.20 mm (0.4409 inches) in diameter with a 143 mm overall length and a 106 mm flute length. The bit is manufactured from high speed steel with an oxide coating that reduces friction and provides moderate corrosion resistance during use. The 118-degree standard point angle suits a wide range of common materials and is the most widely stocked geometry for production and maintenance drilling. Right-hand cutting with a spiral flute design promotes efficient chip evacuation. Licensed tradespeople and machinists use this size in both benchtop drill presses and handheld power drills.

This drill bit falls within the 10.00 to 12.50 mm diameter range and is suited for residential maintenance, light industrial, and commercial construction applications. It is a common size for clearance holes, pilot holes ahead of larger boring operations, and general fabrication work. The straight-cylindrical shank fits standard three-jaw drill chucks found on most drill presses and portable drills. Electricians, plumbers, HVAC technicians, and general contractors frequently use this diameter when drilling through framing, sheet metal, and similar substrates.

Key Features

• 11.20 mm (0.4409 inches) diameter - fits standard metric and fractional chuck setups
• 118-degree standard point angle for versatile, general-purpose cutting
• High speed steel construction for durability across a range of materials
• Oxide coating reduces friction and provides basic surface protection
• Spiral flute geometry promotes chip clearing and reduces heat buildup
• Right-hand cutting, straight-cylindrical shank - compatible with most three-jaw chucks

Compatibility

Designed as a general-purpose jobber drill bit for use in any drill press or handheld power drill accepting a straight-cylindrical shank in the 10.00 to 12.50 mm diameter range.

Installation Notes

Secure the shank fully in the drill chuck and verify it is centered before operation. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend bit life and reduce heat. Always wear eye protection and secure the workpiece before drilling. Discard or resharpen the bit if the cutting edges show visible wear, as a dull drill increases heat, wander, and the risk of breakage.