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The CLEVELAND C13103 is an aircraft extension drill bit engineered for precision drilling in tight-clearance and extended-reach applications. Built from high-speed steel with a bright/uncoated finish, it features a 135-degree split point that is self-centering, reducing the need for a center punch and minimizing walking on entry. The bit measures 3/32 inch (0.0938 inch) in diameter with a 6-inch overall length, making it well-suited for reaching fastener locations in confined spaces. Web thinning reduces thrust and improves chip evacuation. The spiral flute geometry and right-hand cutting direction are standard for general-purpose production and maintenance drilling.
This drill bit is used in aerospace, sheet metal, and structural fabrication applications where standard-length bits cannot reach. The extended 6-inch body is common in aircraft assembly, airframe repair, and similar maintenance operations where drilling through structural members, brackets, or layered panels requires additional reach. It is also used in automotive, HVAC ductwork, and general metalworking when access is limited. Licensed A and P mechanics, sheet metal workers, and maintenance technicians are the typical end users. The 1.25-inch flute length handles the cutting load for the intended diameter and material range.
Designed as an OEM-style general-purpose extended drill bit for use in standard 3/32 inch straight-shank drill chucks and compatible drilling equipment in aerospace, sheet metal, and industrial maintenance applications.
This bit is installed and removed by a licensed technician or qualified tradesperson using a standard keyed or keyless drill chuck rated for the shank diameter. Ensure the drill is fully powered off and the chuck is secured before use. Maintain appropriate feed rate and cutting speed for the material being drilled to avoid overheating the high-speed steel. Eye protection and chip guards are required per standard shop safety practices.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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