Hertel 04138970 Cobalt Jobber Drill Bit Wire 50 135 Deg

Product Description

The HERTEL 04138970 is a cobalt jobber-length drill bit in wire gauge size 50, with a decimal diameter of 0.0700 inches and an overall length of 2 inches. Built from heavy-duty cobalt steel and finished with an oxide coating, it is engineered for demanding holemaking in hard and abrasive materials. The 135-degree split point reduces walking on contact and requires less feed pressure than a standard 118-degree point. A tapered web with web thinning further reduces cutting resistance. This bit is suited for machinists, maintenance technicians, and tool-and-die professionals working with harder ferrous metals, stainless steel, and high-strength alloys.

This drill bit fits standard jobber-series applications in metalworking, fabrication, and industrial maintenance environments. The straight-cylindrical shank seats directly into drill chucks, drill presses, CNC machining centers, and hand drills without adapters. The regular spiral flute provides efficient chip evacuation during through-hole drilling. At 0.0700 inches in diameter, it is commonly used for tapping prep, precision hole placement, and light-gauge sheet metal work where accuracy and bit longevity in tough materials are the priority.

Key Features

• Cobalt steel construction rated heavy duty for extended tool life in hard materials
• 135-degree split point reduces drill walking and lowers required feed pressure
• Oxide coating provides heat resistance and lubricity during high-speed cutting
• Web-thinned tapered web reduces thrust load and improves chip flow
• Right-hand spiral flute with regular helix for consistent chip evacuation
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as an OEM-style jobber drill bit for use in any drill press, hand drill, or CNC machining center equipped with a chuck accepting a 0.0700-inch straight-cylindrical shank.

Installation Notes

This bit is installed and replaced by machinists and maintenance technicians. Secure the shank fully in the chuck and verify concentricity before drilling. Use appropriate cutting fluid or coolant when drilling ferrous metals to extend bit life and maintain hole tolerance. Inspect the cutting edges for wear regularly, as cobalt bits used dry in hard materials can chip rather than wear gradually.