gearhead
/ˈɡɪrˌhɛd/
noun
- A person who is very interested in cars, machines, or technology.
- The car show was full of gearheads admiring the engines.
- My uncle is a real gearhead; he spends every weekend working on his vintage Mustang.
- She's a gearhead who loves building custom computers.
- The part of a machine that contains the gears, especially in a motor or engine.
- A faulty gearhead can cause the machine to make a grinding noise.
- The robot's gearhead allows its arm to move smoothly.
- The mechanic replaced the damaged gearhead in the drill.
Synonyms