Chicago-Latrobe
Chicago-Latrobe 11182 #58 135° NAS-Type Aircraft Extension Drill
A #58 aircraft extension drill with 135° split point, high-speed steel, black oxide finish and 11/16 in maximum drilling depth
- NAS-type geometry meets aerospace drilling standards
- 135° split point starts holes without wandering
- High-speed steel with black oxide resists wear
- 11/16 in max depth suits extended-reach tasks
- 28° helix clears chips in wire-grade material
Chicago-Latrobe 11182 Aircraft Extension Drill
The Chicago-Latrobe 11182 is a high-speed steel drill bit with a black oxide finish. It features a 135-degree split point designed for self-centering and reduced walking. This NAS-type extension drill targets aerospace maintenance and precision metalworking tasks.
Wire gauge 58 with 11/16 inch depth capacity
The #58 wire gauge suits small-diameter hole requirements in thin materials. Maximum drilling depth reaches 11/16 in at a 4xD ratio for controlled penetration. The 28-degree helix angle supports chip evacuation in deep-hole applications. It runs out when material thickness exceeds the flute length or hardness demands carbide tooling.
135-degree split point geometry for high-speed steel
The split point geometry centres the bit without a centre punch on flat surfaces. High-speed steel construction withstands the heat generated at 135-degree point angles during extended use. Black oxide coating adds lubricity and corrosion resistance for ferrous metals. The standard limits use to materials compatible with HSS cutting speeds and feed rates.
Highlights
- NAS-type geometry meets aerospace drilling standards
- 135° split point starts holes without wandering
- High-speed steel with black oxide resists wear
- 11/16 in max depth suits extended-reach tasks
- 28° helix clears chips in wire-grade material
Specifications
| Brand | CHICAGO-LATROBE |
|---|
Questions about this item
Will the 135° split point on the #58 drill engage cleanly in existing rivet holes without walking?
The 135° split point is designed to self-centre and reduce walk, so it starts accurately in pre-drilled rivet holes and thin sheet metal.
How can I confirm the 135° point angle is correct once the drill is in the chuck?
Measure the included angle with a drill-point gauge or compare the profile against a known 135° reference; the split point should appear symmetrical and centred.
Does the package include a drill stop for the 11/16 in maximum depth or must I supply one?
Only the high-speed steel extension drill with black oxide finish is supplied; a depth stop or collar must be purchased separately.
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