Definition
A torque wrench that measures the twisting force being applied to a fastener and displays the reading on a dial gauge mounted on the wrench. As the user turns the fastener, a needle on the dial moves to show the amount of torque in real time, allowing the user to stop at the specified value.
Plain English
A wrench with a round gauge on it that shows, like a speedometer, exactly how hard you are tightening a bolt or nut. You watch the needle and stop when it reaches the required number.
Context Anchor
Seen in aircraft maintenance procedures when a part must be tightened to a specified torque value.
Derivation
Torque' comes from the Latin torquere, meaning 'to twist.' A torque wrench measures twisting force. 'Dial-indicating' simply means the reading is shown on a dial face, distinguishing this type from click-type or beam-type torque wrenches.
Why Pilots Care
Correct torque prevents fastener failure or damage to critical airframe and engine components that could lead to in-flight issues.
Intuition Check
Do not assume this wrench clicks when the correct value is reached. With a dial-indicating torque wrench, the user watches the dial reading and stops at the required torque.
Example Sentence 1
The mechanic used a dial-indicating torque wrench to tighten the cylinder hold-down nuts, watching the needle climb to the value listed in the engine manual.
Example Sentence 2
After replacing the wheel, the technician checked the final reading on the dial-indicating torque wrench to confirm each lug nut was properly secured.