Hertel C.402.0785 Jobber Drill Bit 7.85 Mm Hss

Product Description

The HERTEL C.402.0785 is a general-purpose jobber-length drill bit designed for precision hole-making in a wide range of materials. It measures 7.85 mm (0.3091 inches) in diameter with an overall length of 114 mm (approximately 4.49 inches) and a flute length of 81 mm (approximately 3.19 inches). The bit is manufactured from high speed steel (HSS) with an oxide coating that provides moderate lubricity and surface protection during drilling. The standard 118-degree point angle suits a broad range of common materials including mild steel, aluminum, wood, and plastics. Machinists, maintenance technicians, and fabricators install this bit in standard drill presses, hand drills, and CNC drilling applications.

This drill bit is suited for general-purpose production and maintenance drilling in both shop and field environments. The straight-cylindrical shank fits standard three-jaw drill chucks across a range of machine types. Its spiral flute geometry promotes chip evacuation during through-hole and blind-hole drilling operations. The right-hand cutting direction is compatible with conventional forward-rotation drilling equipment. It falls within the 7.00 mm to 8.00 mm diameter range class and is appropriate for applications requiring a 0.3000 to 0.3500 inch decimal inch size range.

Key Features

• 7.85 mm (0.3091 inch) diameter with 118-degree standard point angle
• High speed steel construction with oxide coating for surface protection
• 81 mm flute length supports effective chip clearance in deeper holes
• Straight-cylindrical shank fits standard drill chucks without adapters
• Right-hand spiral flute geometry for use with conventional forward-rotation equipment
• Two-flute design balances cutting efficiency with rigidity for general-purpose work

Compatibility

Designed as a general-purpose replacement or stock drill bit for applications requiring a straight-shank jobber drill in the 7.00 mm to 8.00 mm diameter range, compatible with standard three-jaw chucks on drill presses, hand drills, and CNC drilling machines.

Installation Notes

This bit is installed by machinists and maintenance technicians using standard drill chuck equipment. Ensure the shank is fully seated and the chuck is tightened with a chuck key before operation. Match spindle speed to the material being drilled per standard feeds-and-speeds references for HSS tooling. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point shows visible damage.