Hertel 04139218 Cobalt Jobber Drill No 74 135 Deg

Product Description

The HERTEL 04139218 is a cobalt jobber-length drill bit in wire gauge size No. 74, equivalent to 0.0225 inches decimal diameter. It is designed for holemaking in hard and abrasive materials where standard high-speed steel bits fall short. The bit features a 135-degree split point for reduced walking and faster penetration with less feed pressure. An oxide and TiN coating improves surface hardness and extends tool life in production drilling environments. The straight-cylindrical shank accepts standard drill chucks without any modification. Machinists, tool-and-die workers, and maintenance technicians in metalworking and fabrication shops are the primary users of this drill bit.

This bit is suited for drilling ferrous metals, stainless steel, cast iron, and other tough alloys where cobalt-grade tooling is specified. The 1-inch overall length and 1/4-inch flute length make it appropriate for shallow holes in tight-clearance applications. Its heavy-duty grade and web-thinned, tapered web configuration support repeatable, accurate hole quality in both manual drill press and CNC spindle setups. It is sold individually as a single unit, though minimum order quantities apply per supplier terms.

Key Features

• Cobalt construction for improved heat and wear resistance over standard HSS bits
• 135-degree split point reduces bit walking and decreases required thrust force
• Oxide and TiN dual coating extends cutting life in abrasive and hard materials
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Web-thinned tapered web supports clean entry and consistent hole geometry
• Straight-cylindrical shank fits standard 3-jaw drill chucks without adapters

Compatibility

Designed as an OEM-style replacement or standard tooling selection for any drill press, hand drill, or CNC spindle accepting a straight-cylindrical shank with a 0.0225-inch diameter, in wire gauge size No. 74 applications.

Installation Notes

Installation is performed by machinists or maintenance technicians. Secure the shank fully in the chuck and verify runout before beginning a cut. Power down and lock out the machine before changing bits. Do not exceed the spindle speed rating appropriate for cobalt tooling at this diameter in the material being drilled.