Chicago-Latrobe
Chicago-Latrobe 11001 135 Degree Aircraft Extension Drill 1/16 in 28 Degrees
A 1/16-inch aircraft extension drill with a 135-degree split point for self-centering starts and 28-degree helix for chip clearance
- 135° split point starts cleanly on contact
- 1/16 in drill bit drills precise pilot holes
- 7/8 in maximum depth reaches through thin sheet
- High-speed steel with black oxide resists wear
- 28° helix clears chips in deep drilling
Chicago-Latrobe 11001 Aircraft Extension Drill
The Chicago-Latrobe 11001 is a 135-degree NAS-type aircraft extension drill made from high-speed steel with a black oxide finish. It features a 1/16 inch fractional drill bit size and a split point design for accurate starts. This tool is built for machining high-performance applications requiring extended reach.
Suited for precision drilling in aerospace
This drill suits professionals creating deep holes in hard materials where a 135-degree split point reduces walking. The 7/8 inch maximum drilling depth supports through-hole tasks in thick stock. Buyers needing larger diameters or different point angles should look at other options.
135-degree split point geometry defines
The 135-degree point angle with split point geometry centres the bit instantly on contact, preventing drift on curved or hardened surfaces. Combined with high-speed steel construction, it delivers clean holes at the specified 4xD depth ratio. This specific angle determines suitability for your material hardness.
Highlights
- 135° split point starts cleanly on contact
- 1/16 in drill bit drills precise pilot holes
- 7/8 in maximum depth reaches through thin sheet
- High-speed steel with black oxide resists wear
- 28° helix clears chips in deep drilling
Specifications
| Brand | CHICAGO-LATROBE |
|---|
Questions about this item
How do I install the 135-degree split-point drill bit correctly, and what step do people often miss?
Chuck the 1/16-inch shank securely in a drill press or hand drill, align the split point with the centre mark, and apply steady pressure — the step many skip is using a pilot hole or centre punch to prevent the bit from wandering on hard material.
What maintenance or replacement will this high-speed steel bit need later?
The black-oxide coating resists corrosion, but the cutting edges will dull with use; resharpen the 135-degree split point on a drill grinder or replace the bit once the 7/8-inch flute length shows excessive wear or chipping.
What limit appears first during sustained drilling with this 4xD extension drill?
The 28-degree helix angle optimises chip evacuation, yet the 7/8-inch maximum drilling depth is reached quickly in deep holes, so hole depth becomes the practical limit before heat buildup in the high-speed steel body.
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