Hertel C.402.1290 Jobber Drill Bit 12.90 Mm Hss

Product Description

The HERTEL C.402.1290 is a general-purpose jobber-length drill bit designed for production and maintenance drilling in metal, wood, and plastic. Ground from high speed steel with an oxide coating for improved lubricity and basic heat resistance, this bit features a standard 118-degree point angle suited to a wide range of workpiece materials. The straight-cylindrical shank accepts standard three-jaw drill chucks on both handheld and bench-mounted equipment. At 12.90 mm (0.5079 inches) in diameter with a 152 mm overall length and a 114 mm flute length, it delivers the reach and chip clearance expected of a full-length jobber design.

This drill bit is intended for general-purpose metalworking, fabrication shops, maintenance facilities, and light manufacturing environments. It is sold as a single unit, making it a straightforward replacement or addition to an existing drill index. Machinists, millwrights, pipefitters, and general maintenance technicians commonly use jobber-length bits in this diameter range for clearance holes, pilot holes, and through-hole drilling in structural steel, pipe, plate, and similar materials.

Key Features

• 12.90 mm (0.5079 inch) diameter falls within the 12.50 mm to 15.00 mm size range for standard jobber indexing
• 118-degree standard point angle for broad material compatibility
• High speed steel construction with oxide coating for reduced friction and basic corrosion resistance
• Right-hand spiral flute geometry for efficient chip evacuation
• Straight-cylindrical shank fits standard drill chucks without adapters
• 152 mm overall length provides jobber-standard reach for typical through-hole applications

Compatibility

Designed as a general-purpose jobber drill bit compatible with any standard drill chuck accepting a straight-cylindrical shank in the appropriate diameter range.

Installation Notes

Installation is performed by machinists, maintenance technicians, or fabricators using any drill press, CNC drilling machine, or handheld drill with a compatible chuck. Secure the shank fully in the chuck and verify runout before drilling. Use appropriate cutting fluid or coolant for ferrous materials to extend tool life, even though this bit does not support through-coolant delivery. Wear appropriate eye protection and secure the workpiece before engaging the spindle.