Hertel C.E13.0794 Extra Length Cobalt Drill Bit 5/16 in

Product Description

The HERTEL C.E13.0794 is a cobalt extra length drill bit designed for drilling through hard metals, stainless steel, and other tough materials where standard-length bits fall short. Built from cobalt high-speed steel, the bit resists heat buildup during aggressive drilling cycles. It features a 135-degree split-point tip that self-centers on contact and reduces the need for a center punch. The 5/16-inch diameter and 8-inch overall length make it well suited for deep-hole applications in both handheld and drill-press setups. The bright uncoated finish allows for easy wear inspection during service.

This bit is used in metalworking, fabrication, and maintenance applications where extra reach is required and standard jobber-length bits cannot achieve the necessary hole depth. Typical install scenarios include drilling through structural members, thick plate, angle iron, or stacked material. It is commonly used by machinists, pipefitters, ironworkers, and maintenance technicians working on HVAC equipment frames, structural steel, and heavy mechanical assemblies. The general-purpose grade makes it a reliable shop staple for recurring drilling tasks across a range of base metals.

Key Features

• Cobalt construction resists heat and wear when drilling hard or abrasive metals
• 135-degree split-point tip self-centers and reduces walking on contact
• 8-inch overall length provides extra reach for deep-hole applications
• 5.5-inch flute length ensures efficient chip evacuation on deep passes
• Bright uncoated finish allows visual inspection of cutting edge condition
• Two-flute design balances chip clearance and rigidity in metal drilling

Compatibility

Designed as an OEM-style replacement or shop-stock drill bit compatible with standard 3/8-inch or larger keyed and keyless drill chucks, drill presses, and magnetic drill units accepting round-shank bits at 5/16-inch diameter.

Installation Notes

Install and remove this bit only with the drill fully powered off and the chuck key removed from the chuck. Secure the workpiece with clamps or a vise before drilling to prevent spinning or shifting. Use cutting fluid or a suitable coolant when drilling harder metals to extend bit life and reduce heat buildup. Inspection and replacement of worn bits should follow standard shop safety practices.