Chicago-Latrobe
Chicago-Latrobe 11140 #16 135° Split-Point Aircraft Extension Drill
Drills deep holes in wire with a 135-degree split point for accurate starts
- 135° split point starts on contact without wandering
- #16 wire-gauge size suits precision aircraft hole patterns
- High-speed steel with black oxide resists wear in tough alloys
- 28° helix clears chips efficiently at 4×D depth
- 2 3/16 in flute length reaches deep structural rivet holes
Chicago-Latrobe 11140 Aircraft Extension Drill
This drill is built for aviation maintenance and precision metalwork where deep, accurate holes are required. The 135-degree split point centres the bit instantly on hard materials without a pilot hole. High-speed steel with black oxide finish resists wear during repetitive drilling tasks. It suits professionals who need reliable performance in confined or deep-reach applications.
Sustained Drilling Performance
The split-point geometry reduces thrust force, allowing the bit to cut efficiently through tough alloys without wandering. Black oxide coating helps dissipate heat during extended use, maintaining edge integrity over long drilling cycles. The 28-degree helix angle promotes consistent chip evacuation at depth. This design supports steady feed rates even when drilling to the full 2 3/16 inch capacity.
Installation and Common Issues
The straight shank fits standard drill chucks and quick-change adapters without modification. Ensure the chuck is tightened securely to prevent slippage under high torque. The extended length demands rigid workpiece clamping to avoid vibration and hole misalignment. Inadequate lubrication or excessive speed can cause premature dulling or breakage in hard materials.
Highlights
- 135° split point starts on contact without wandering
- #16 wire-gauge size suits precision aircraft hole patterns
- High-speed steel with black oxide resists wear in tough alloys
- 28° helix clears chips efficiently at 4×D depth
- 2 3/16 in flute length reaches deep structural rivet holes
Specifications
| Brand | CHICAGO-LATROBE |
|---|
Questions about this item
Does the 135° split point on the #16 bit reduce heat buildup during extended drilling?
The 135° split-point geometry centres the bit quickly and cuts efficiently, which lowers thrust and friction so the bit runs cooler during long drilling sessions.
What chuck size is required to hold the #16 shank on this drill?
A standard three-jaw chuck that accepts wire-gauge shanks will grip the #16 bit securely; no special adapter is needed.
Will the 135° split point engage cleanly in older work-hardened steel without walking?
Yes, the split point self-centres on hard materials, preventing the bit from wandering on existing hardened surfaces.
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