Hertel 04138707 Cobalt Jobber Drill Bit No 23 135 Deg

Product Description

The HERTEL 04138707 is a cobalt jobber-length drill bit sized to wire gauge No. 23, with a decimal diameter of 0.154 inches. It features a 135-degree split point that reduces walking on contact and allows drilling to start without a center punch in most applications. The flute is spiral-cut in a right-hand direction with a regular helix, and the straight cylindrical shank seats directly in standard three-jaw chucks. Overall length is 3.125 inches with a 2-inch flute length. The cobalt steel construction handles harder workpiece materials that would accelerate wear on standard high-speed steel bits. An oxide finish provides additional surface hardness and corrosion resistance. This is a heavy-duty grade bit suited for production and service work.

The 04138707 is a general-purpose holemaking tool sized for applications requiring a 0.154-inch diameter hole, including tapping prep for small fasteners and precision clearance holes in steel, stainless, cast iron, and hard alloys. The heavy-duty cobalt grade makes it appropriate for metalworking environments where heat buildup is a concern, such as continuous drilling in thick plate or work on work-hardening materials. Machinists, maintenance technicians, and trade professionals working with drill presses or handheld power tools will find this bit fits standard chuck sizes without modification.

Key Features

• Cobalt steel construction resists heat and wear during drilling in hard or abrasive metals
• 135-degree split point reduces thrust and eliminates walking on entry
• Oxide finish adds surface hardness and corrosion resistance
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Web-thinned, tapered web design reduces cutting resistance
• Straight cylindrical shank fits standard three-jaw drill chucks

Compatibility

Designed as a standard jobber-length drill bit compatible with any three-jaw drill chuck or collet system that accepts a 0.154-inch straight cylindrical shank, including benchtop drill presses and handheld power drills used in metal fabrication and maintenance applications.

Installation Notes

Secure the shank fully in the chuck and verify concentricity before drilling. Always power down and de-energize any drill press or tool before changing bits. Use cutting fluid or coolant when drilling hard alloys to extend bit life, even though this bit does not support coolant-through delivery. Wear appropriate eye protection per shop safety requirements.