Hertel C.E14.1588 Extra Length Cobalt Drill Bit 5/8 in

Product Description

The HERTEL C.E14.1588 is a 5/8-inch extra-length cobalt drill bit designed for demanding drilling applications where standard-length bits fall short. Built from cobalt high-speed steel with a bright/uncoated finish, this bit delivers heat and wear resistance needed when cutting through tough alloys, stainless steel, and hardened materials. The 135-degree split-point tip reduces walking on contact and allows drilling without a center punch on most surfaces. With a 12-inch overall length and 9-inch flute length, it reaches deep into workpieces or fixtures that standard jobber bits cannot access. Installed by machinists and maintenance technicians in production and MRO settings.

This extra-length drill bit is suited for metalworking operations in manufacturing, fabrication, and industrial maintenance environments. The extended reach is particularly useful when drilling through thick structural members, deep fixtures, or stacked materials where a jobber-length bit would bottom out before completing the hole. The 2-flute geometry promotes efficient chip evacuation in through-hole drilling. It is intended for use in drill presses, milling machines, and heavy-duty hand drills running appropriate speeds for cobalt tooling.

Key Features

• 5/8-inch (0.6250 inches) diameter for precise, on-size holes
• Cobalt construction provides elevated heat resistance for hard and abrasive materials
• 135-degree split-point tip reduces thrust and eliminates center-punch requirement on most surfaces
• 12-inch overall length with 9-inch flute length for deep-reach drilling
• Bright/uncoated finish — no coating to chip or peel during high-heat cuts
• 2-flute design promotes chip clearance in through-hole and deep drilling

Compatibility

Designed as a general-purpose extra-length drill bit compatible with standard drill chucks and collets accepting a 5/8-inch shank in drill presses, milling machines, and heavy-duty rotary tools.

Installation Notes

Cobalt drill bits should be run at reduced surface speeds compared to standard high-speed steel bits — consult published cutting-speed charts for the workpiece material before use. Secure the workpiece firmly and use cutting fluid or coolant appropriate for the material being drilled to extend tool life. Inspect the split-point tip for chipping or wear before each use; a damaged tip increases thrust and reduces hole quality. Coolant-through capability is not supported on this bit.