Hertel C.E13.0397 Extra Length Cobalt Drill Bit

Product Description

The HERTEL C.E13.0397 is a cobalt extra length drill bit designed for drilling through tough materials where standard-length bits cannot reach or maintain stability. Built from cobalt high-speed steel with a bright uncoated finish, it carries a 135-degree split-point tip that reduces walking and allows self-centering starts without a center punch. The overall length of 8 inches and a 5.5-inch flute length make it well suited for deep-hole applications. This bit is a general-purpose tool used by machinists, pipefitters, and maintenance technicians working on structural steel, stainless, and other hard alloys.

This extra length drill bit fits production and job-site applications where standard jobber-length bits fall short. It is commonly used in metal fabrication shops, HVAC ductwork installations, plumbing rough-ins through structural members, and industrial maintenance settings. The 0.1562-inch diameter corresponds to a 5/32-inch nominal size, a common pilot and clearance hole size across mechanical and electrical trade work. Two-flute geometry provides efficient chip evacuation during deep drilling passes.

Key Features

• Cobalt construction for heat resistance and durability in hard and abrasive materials
• 135-degree split-point tip for self-centering starts and reduced thrust
• 8-inch overall length allows deep-hole drilling beyond jobber-length reach
• 5.5-inch flute length promotes chip clearing in extended-depth cuts
• Bright uncoated finish for easy visual inspection of wear
• Two-flute design balances chip evacuation and cutting speed

Compatibility

Designed as a general-purpose extra length drill bit compatible with standard drill chucks and magnetic drill presses accepting round-shank bits sized at 0.1562 inches in diameter.

Installation Notes

Installation of this bit should be performed by a qualified machinist or tradesperson using appropriate drilling equipment rated for cobalt tooling. Secure the workpiece fully before drilling to prevent movement and bit breakage. Use cutting fluid or coolant when drilling hard metals to extend bit life, even though this bit does not feature through-coolant channels. Follow applicable shop safety practices and wear eye protection at all times during use.