Hertel C.E11.2143 Extra Length Drill Bit 0.8438 in Hss

Product Description

The HERTEL C.E11.2143 is an extra length high-speed steel drill bit engineered for deep-hole drilling applications where standard-length bits cannot reach. Built from high-speed steel with an oxide finish, it measures 18 inches overall with a 12-inch flute length, giving tradespeople and machinists the reach needed for through-holes in thick stock, structural members, or deep assemblies. The 118-degree point angle is a general-purpose geometry that works across a wide range of materials. This bit ships as a single unit and is suited for use with heavy-duty drill presses, magnetic-base drills, or hand-held power drills with adequate torque capacity.

This extra length drill bit is intended for general-purpose drilling in metalworking, mechanical contracting, and construction trades. Its 0.8438-inch diameter makes it appropriate for large fastener clearances, conduit knockouts, and similar applications requiring an oversized hole in metal, wood, or composite materials. The extended 18-inch overall length is particularly useful when boring through deep structural steel sections, heavy timber, or layered assemblies where a standard jobber-length bit would come up short. Electricians, pipefitters, and ironworkers commonly reach for extended drill bits in these situations.

Key Features

• 0.8438-inch diameter for large-clearance and knockout drilling
• 18-inch overall length provides reach standard bits cannot achieve
• 12-inch flute length for effective chip evacuation in deep holes
• 118-degree point angle suits general-purpose use across common materials
• High-speed steel construction offers durability in production and field use
• Oxide finish provides light corrosion resistance and reduces chip welding

Compatibility

Designed as a general-purpose extra length drill bit compatible with standard drill chucks and magnetic-base drill setups accepting shank sizes appropriate to the 0.8438-inch tool diameter.

Installation Notes

Install and remove drill bits only when the drill is powered down and unplugged or locked out per applicable OSHA lockout-tagout procedures. Secure workpieces firmly before drilling to prevent grab or walking. Use cutting fluid or coolant when drilling through metal to extend bit life and reduce heat buildup. Inspect the bit for cracks, worn flutes, or a degraded cutting edge before each use and replace if any damage is present.