Hertel C.E07.0505 Aircraft Extension Drill Bit 8 Wire

Product Description

The HERTEL C.E07.0505 is a cobalt aircraft extension drill bit designed for drilling in hard and abrasion-resistant materials where standard-length bits cannot reach. Built to a 135-degree split point with web thinning, it self-centers on contact and reduces the thrust needed to start a hole without a center punch. The straw finish indicates the cobalt content has been heat-treated for added hardness and wear resistance. At 12 inches overall length with a 2.4375-inch spiral flute, this bit is well suited for deep-reach drilling applications in metalworking, aerospace, and maintenance environments. It is sized to wire gauge number 8, equivalent to 0.1990 inches in decimal.

This bit is used in applications requiring extended reach into confined or deep cavities, including airframe work, structural fabrication, and general metalworking. The spiral flute geometry promotes chip evacuation during drilling in steel, stainless steel, and other tough alloys. It is appropriate for use in hand-held drill motors, drill presses, and flexible-shaft tools where a straight cylindrical shank is compatible. Right-hand cutting direction is standard for conventional drill motor use. General-purpose tool performance rating makes it applicable across a broad range of metal drilling tasks.

Key Features

• 135-degree split point with self-centering geometry eliminates need for a center punch in most applications
• Cobalt construction with straw finish for increased hardness and heat resistance in tough metals
• Web-thinned tapered web reduces cutting thrust and improves bit longevity
• 12-inch overall length provides extended reach into deep or restricted work areas
• Straight cylindrical shank at 0.1990 inches fits standard drill chucks
• Meets NAS 907 standard for aircraft extension drill bits

Compatibility

Designed as an aircraft-extension-style replacement or addition for use in standard straight-shank drill chucks where wire gauge number 8 diameter and extended reach are required.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists, maintenance technicians, or aviation maintenance professionals. Secure the workpiece firmly before drilling and ensure the drill chuck is tightened completely around the shank before operation. Power down and de-energize any equipment being drilled into before beginning work. Follow applicable shop safety practices and wear appropriate eye and hand protection when operating at high speeds in metal drilling applications.