dead axle
Definition
- Noun:
- A non-rotating axle that supports a wheel but does not transmit power to it: A "dead axle" is a fixed axle that carries the weight of a vehicle and supports a wheel, but it does not rotate to drive the wheel. It is a passive structural component.
Usage
- Noun:
- The term is used primarily in mechanical and automotive engineering contexts to describe a specific type of axle assembly.
- It is often contrasted with a "live axle," which is an axle that both supports a wheel and transmits driving power to it.
Examples
- Noun:
- The trailer uses a dead axle, so its wheels are not powered by the engine.
- In this vehicle design, the front axle is a dead axle, while the rear axle is a live axle that provides propulsion.
Advanced Usage
- Technical Distinction: In complex vehicle designs like some trucks or trailers, a "dead axle" may be referred to as a "tag axle" or a "pusher axle" when discussing its specific location and load-bearing function, though these terms can have nuanced differences.
- Historical Context: Early automobiles and carriages frequently used dead axles, especially for non-steering, non-driving wheels.
Variants and Related Words
- Live Axle (n): An axle that both supports a wheel and transmits driving torque to it.
- Axle (n): The central shaft for a rotating wheel or gear.
- Beam Axle (n): A rigid axle that connects a pair of wheels, which can be either a dead or live axle.
Synonyms
- Non-driving axle: An axle that does not deliver power to the wheels.
- Fixed axle: An axle that does not rotate.
- Tag axle (in specific contexts): An additional, non-powered axle close to the drive axles on a truck.
Antonyms
- Live axle: A driving axle.
- Drive axle: An axle that transmits power from the engine to the wheels.
Related Phrases/Idioms
Noun
-
an axle that carries a wheel but without power to drive it
