12" HSS Aircraft Extension Drills

Champion CS12X 12″ Aircraft Extension Drills — Long-Reach 135° Split Point HSS Drills

The Champion CS12X 12″ Aircraft Extension Drills are heavy-duty extension drill bits engineered to deliver exceptional reach and performance in applications where extra depth and precision are required. Designed for aircraft assembly, structural fabrication, maintenance, and deep drilling tasks, these drills are ideal for creating clean, accurate holes in aluminum and low to medium steel alloys. 

Built from high-speed steel with a black oxide finish, CS12X drills resist wear and heat buildup for improved durability and longer tool life. The 135° self-centering split point dramatically reduces walking at the start of drilling, helping professionals achieve faster, more accurate penetration even in deep or awkward positions. The flute length matches a standard jobber drill but with a total length of 12″ to give you the extended reach needed for recessed or obstructed holes.

Key Features

• 12″ Overall Length for deep or hard-to-reach holes.
• 135° Self-Centering Split Point reduces walking and improves accuracy. 
• Black Oxide Treated High Speed Steel for enhanced heat resistance and long life.
• Spring-Tempered Shank prevents permanent bending when drilling at angle misalignment.
• Flute length matches standard jobber drills to aid chip evacuation. 

Materials & Applications

⚠ Cutting tools may shatter. Always wear eye protection, gloves, and proper PPE when drilling. Use appropriate speeds and lubrication on hard metals.