Hertel C.402.0820 Jobber Drill Bit 8.20 Mm Hss

Product Description

The HERTEL C.402.0820 is a high speed steel jobber-length drill bit designed for general-purpose drilling in metal, wood, and plastic. The 118-degree standard point angle provides a self-centering entry suitable for a wide range of workpiece materials. An oxide coating reduces friction and helps resist heat buildup during cutting. With an overall length of 117 millimeters and a flute length of 84 millimeters, this bit fits standard three-jaw drill chucks and is sized for production and maintenance drilling tasks performed by machinists, tool-and-die tradespeople, and industrial maintenance technicians.

This drill bit is suited for bench-drill, drill-press, and hand-held power drill applications in light manufacturing, fabrication shops, and maintenance environments. The 8.20 mm diameter (0.3228 inches decimal equivalent) falls within the 8.00 mm to 9.00 mm size range, making it appropriate wherever a close-to-letter or fractional-inch equivalent hole is required. Right-hand spiral flutes efficiently evacuate chips from the cut zone, keeping the hole clean and reducing the risk of chip packing in deeper bores.

Key Features

• 8.20 mm (0.3228 inch) diameter for precise hole sizing in the 0.3000 to 0.3500 inch range
• 118-degree standard point angle for self-centering entry on flat and curved surfaces
• High speed steel construction provides hardness and toughness across general-purpose materials
• Oxide coating reduces surface friction and extends cutting life under moderate heat
• Two right-hand spiral flutes promote efficient chip evacuation
• Straight-cylindrical shank seats securely in standard drill chucks without slippage

Compatibility

Designed as a general-purpose jobber drill for use in standard three-jaw drill chucks accepting straight-cylindrical shanks. Fits drill presses, CNC drilling machines, and hand-held power drills configured for metric or equivalent decimal-inch tooling in the 0.3000 to 0.3500 inch range.

Installation Notes

Install in a properly sized drill chuck and tighten with a chuck key before operation. Ensure the workpiece is securely clamped before drilling to prevent movement and bit breakage. Apply appropriate cutting fluid when drilling ferrous metals to manage heat and extend tool life. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point is damaged.