Definition
A handheld or fixed power tool used to rotate a drill bit, reamer, or similar cutting attachment for making or finishing holes in aircraft structure and components. Drill motors used in aviation maintenance are commonly pneumatic (air-driven) but may also be electric, and are selected based on required speed, torque, and access to the work area.
Plain English
The power tool that spins a drill bit. Mechanics use it to drill holes in aircraft parts during repair, modification, or assembly.
Context Anchor
Seen in aircraft maintenance tasks such as sheet metal repair, panel removal, and installing hardware.
Derivation
“Drill” comes from older words meaning to bore or make a hole. “Motor” comes from a Latin root meaning “to move.” Together, the term points to a tool that supplies the motion for drilling.
Why Pilots Care
A drill motor used carelessly can make a hole in the wrong place, damage aircraft structure, or leave a poor-quality hole that affects how securely a part is attached.
Intuition Check
Do not read “motor” here as an aircraft engine. In this term, the motor is the power source inside the drilling tool.
Example Sentence 1
The technician selected a low-speed drill motor to enlarge the rivet hole without overheating the aluminum skin.
Example Sentence 2
After inspection, the drill motor was set aside and the holes were deburred to prevent stress cracks.