Chicago-Latrobe
Chicago-Latrobe 11110 135 Degree NAS Aircraft Extension Drill 9/32 in
A 9/32 inch aircraft extension drill with a 135 degree split point and 2 15/16 inch drilling depth
- 135-degree split point starts on contact
- High-speed steel with black oxide resists wear
- 28-degree helix clears chips efficiently
- 2-15/16-inch flute reaches deep holes
- NAS-type design meets aircraft standards
Application & User
The Chicago-Latrobe 11110 is a 135 degree NAS aircraft extension drill built for deep hole drilling in aerospace maintenance and manufacturing. Its 9/32 inch fractional size and split point design serve technicians who need accurate starts without centre punching in high performance machining grades.
Fit & Exclusions
This bit suits mechanics drilling 2 15/16 inch maximum depth holes where the 135 degree point angle and black oxide finish reduce walking on tough alloys. Shops requiring a different fractional diameter, a standard jobber length, or a coated carbide tip for abrasive composites should select another tool.
Deciding Specification
The 135 degree split point angle combined with a 4xD length ratio determines whether this extension drill reaches the required depth while maintaining centring accuracy in the target material.
Highlights
- 135-degree split point starts on contact
- High-speed steel with black oxide resists wear
- 28-degree helix clears chips efficiently
- 2-15/16-inch flute reaches deep holes
- NAS-type design meets aircraft standards
Specifications
| Brand | CHICAGO-LATROBE |
|---|
Questions about this item
What chuck size is required for the 9/32 in shank on this extension drill?
A standard 3/8 in or larger drill chuck will accept the 9/32 in shank of this high-speed steel bit.
How do I start a hole with the 135 degree split point without the bit walking?
Apply firm, steady pressure at low speed; the 135 degree split point self-centres so no centre punch is needed.
When should this black oxide high-speed steel bit be replaced?
Replace it when the split point dulls, the black oxide coating wears off, or chips no longer clear from the 28 degree flutes.
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