Hertel 84579804 Jobber Drill 25/64 in 135 Deg Tin Hss

Product Description

The HERTEL 84579804 is a high speed steel jobber-length drill bit designed for production holemaking in metal, wood, and general-purpose materials. It carries a titanium nitride (TiN) coating that increases surface hardness and reduces friction at the cutting edge, extending tool life in repetitive drilling applications. The 135-degree split point geometry allows the bit to engage material quickly without a center punch, reducing walking and improving hole accuracy. With a 5-1/8-inch overall length and a straight cylindrical shank, this bit fits standard three-jaw drill chucks and is suited for use in both drill presses and hand-held power drills.

This drill bit is used across general metalworking, light fabrication, and maintenance trades. The jobber-length format is a standard choice for machinists, millwrights, pipefitters, and maintenance technicians who need a reliable all-around drill for ferrous and non-ferrous metals, plastics, and similar materials. The heavy-duty grade designation and web-thinned, tapered web configuration make it well-suited for demanding production environments where hole quality and bit longevity matter.

Key Features

• 25/64-inch (0.3906 inch) diameter for precision sizing in the 0.3500 to 0.4000 inch range
• 135-degree split point reduces walking and eliminates the need for center punching
• TiN coating increases surface hardness and extends cutting edge life
• Web-thinned, tapered web reduces thrust force and improves chip evacuation
• Two-flute spiral design with right-hand cutting direction
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a standard jobber-length drill bit compatible with any drill press, CNC drill, or hand-held power tool accepting a straight cylindrical shank in the 25/64-inch diameter range. Meets NAS specification designation.

Installation Notes

Install and remove this bit only with the drilling machine fully powered off and the chuck key removed from the chuck. Secure the shank firmly in a properly sized chuck to the full recommended grip depth before drilling. Use appropriate cutting fluid or coolant when drilling ferrous metals to preserve coating life and prevent work hardening. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is present.