Chicago-Latrobe 11098 135 Degree NAS-Type Aircraft Extension Drill 3/32 in

Aircraft Extension Drill 11098

The Chicago-Latrobe 11098 is a NAS-type aircraft extension drill built for precision drilling in aviation maintenance and manufacturing. Its 3/32 inch fractional size and 135-degree split point deliver accurate hole starts in tough alloys. Machinists and A&P technicians choose it for deep-reach applications where standard jobber drills cannot access the workpiece.

High-Speed Steel Construction

The high-speed steel body with black oxide finish resists wear during extended use in aluminium, titanium and steel structures. A 28-degree helix angle promotes efficient chip evacuation at depths up to 1 1/4 inches. The 4xD length-to-diameter ratio clears obstructions without requiring a separate extension holder or custom tooling.

Sustained Drilling Performance

Under continuous load the split-point geometry maintains centring accuracy and reduces thrust force across the full 1 1/4 inch drilling depth. High-speed steel retains hardness at elevated temperatures generated during deep-hole work in high-performance alloys. The black oxide surface treatment holds coolant effectively to prevent built-up edge during long production runs.