Hertel 04138483 Cobalt Jobber Drill Bit No 1 Wire Size

Product Description

The HERTEL 04138483 is a cobalt jobber-length drill bit in Number 1 wire size (0.2280 inches decimal), designed for heavy-duty holemaking in ferrous and hard materials. The 135-degree split point reduces walking and lowers thrust requirements at entry. An oxide and TiN coating improves surface hardness and wear resistance. The right-hand spiral flute with regular helix and web-thinned, tapered web configuration promotes efficient chip evacuation in deep holes. At 3-7/8 inches overall length with a 2-5/8 inch flute length and straight-cylindrical shank, this bit fits standard drill chucks and is suited for use in drill presses, hand drills, and CNC setups.

This bit is intended for trade and industrial applications where cobalt-grade tooling is specified for harder workpieces including alloy steels, stainless, and cast iron. The heavy-duty grade designation makes it appropriate for machine shops, maintenance technicians, and fabricators who need consistent performance under repeated use. It is sold individually and is compatible with standard 3-jaw drill chucks accepting a 0.2280-inch straight-cylindrical shank.

Key Features

• Number 1 wire size — 0.2280 inches decimal diameter
• 135-degree split point reduces thrust and minimizes bit walking at entry
• Cobalt construction with oxide and TiN coating for extended wear life in hard materials
• Web-thinned, tapered web for improved chip flow and reduced cutting resistance
• Right-hand spiral flute, regular helix — compatible with standard drilling equipment
• Heavy-duty grade designation for demanding holemaking applications

Compatibility

Designed as a standard jobber-length drill bit with a straight-cylindrical shank, compatible with any 3-jaw drill chuck or collet system accepting a 0.2280-inch shank diameter.

Installation Notes

Install in a properly rated drill press, hand drill, or CNC spindle with the chuck tightened securely before operation. Ensure the workpiece is clamped or fixtured to prevent movement during drilling. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole quality. Always wear appropriate eye protection and follow applicable shop safety procedures when operating drill equipment.