Chicago-Latrobe
Chicago-Latrobe 11152 #28 135° NAS aircraft extension drill
#28 aircraft extension drill with 135° split point in high-speed steel for deep-hole precision
- 135° split point starts on contact for accurate holes
- High-speed steel with black oxide resists wear in tough alloys
- NAS-type geometry meets aircraft extension drilling standards
- #28 wire size drills precise 1-3/4 in depth at 4xD
- Chicago-Latrobe 11152 built for professional machining performance
NAS-Type Aircraft Extension Drill
The Chicago-Latrobe 11152 #28 drill bit is engineered for precision drilling in aerospace applications. Its 135-degree split point ensures accurate starting and reduced walking on tough alloys. This new tool targets maintenance technicians and manufacturers who require NAS-compliant hole preparation.
High-Speed Steel Construction and Black Oxide Finish
The high-speed steel body with black oxide coating delivers hardness and corrosion resistance for extended service life. A 4xD flute geometry supports efficient chip evacuation during deep-hole drilling. The straight shank fits standard drill chucks and CNC tool holders for quick changes on the shop floor.
Practical Limits of the 135-Degree Split Point
The 135-degree point angle excels in hard materials but may produce excessive burrs in soft aluminium or plastics. Maximum drilling depth is limited to 1 3/4 inches, restricting use to thinner workpieces or stepped operations. The #28 wire gauge diameter suits specific fastener holes but cannot accommodate larger rivet sizes.
Highlights
- 135° split point starts on contact for accurate holes
- High-speed steel with black oxide resists wear in tough alloys
- NAS-type geometry meets aircraft extension drilling standards
- #28 wire size drills precise 1-3/4 in depth at 4xD
- Chicago-Latrobe 11152 built for professional machining performance
Specifications
| Brand | CHICAGO-LATROBE |
|---|
Questions about this item
What drill bit size and point angle does the 11152 extension drill use?
The 11152 uses a #28 drill bit with a 135 degree split point for self-centering starts.
What shank style and flute length suit the 11152 for aircraft extension drilling?
The 11152 features a straight shank and 1 3/4 inch maximum drilling depth for deep-hole access.
How is the 11152 installed in a drill motor, and what step avoids runout?
Insert the straight shank fully into a matching collet or chuck, then tighten securely to prevent wobble.
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