axle

US /ˈæk.səl/
UK /ˈæk.səl/
"axle" picture
1.

a rod or spindle (either fixed or rotating) passing through the center of a wheel or group of wheels

:
•
The car's rear axle was bent after the accident.
•
The train wheels are mounted on a solid axle.
:
shaftspindlerodpinpivot