That central axle was trying to tear loose again.

And I started to understand what you meant about that central axle pulling loose.

This central axle was attached to the locomotive wheels much like a modern truck.

These pistons turn a flywheel which is connected to a central axle, thus providing locomotion.

The conversion involved removing the central axle of each bogie, lowering the traction motors, and installing new drive rods.

When a planet is at opposition to the Earth, its light is liable to be blocked by the mechanism's central axle.

This drives the machinery using a spur gear mounted on a shaft rather than taking power from the central axle.

Already he could feel that central axle trying to pull free.

Like spokes, cables and four large tunnels ran from this roof surface to the central axle of the wheel.

Within the wheel was a large gear that apparently rotated around a central axle, and meshed with its teeth were several smaller gears.