puolipääakseli

Puolipääakseli, also known as a half-shaft or axle shaft, is a component in a vehicle's drivetrain that transmits rotational power from the differential to the wheels. It is typically a solid bar or tube that connects the differential's output to the wheel hub. In rear-wheel-drive vehicles, there are usually two puolipääakselit, one for each rear wheel. In front-wheel-drive vehicles, there are two puolipääakselit for the front wheels, and in all-wheel-drive vehicles, there are puolipääakselit for both front and rear wheels.

The design of a puolipääakseli can vary depending on the vehicle. Some are solid shafts, while others are hollow tubes. They often incorporate universal joints or constant velocity (CV) joints at either end. These joints allow for changes in angle and distance as the suspension moves and the wheels turn. The CV joints are particularly important in front-wheel-drive vehicles where the front wheels must steer as well as receive power.

The puolipääakseli is subjected to significant torque and stress during operation. Therefore, it is usually made from strong, durable materials like forged steel. Damage to a puolipääakseli, such as a crack or a worn joint, can result in a loss of power to the wheel, vibrations, or a complete failure of the drivetrain. Regular inspection and maintenance are essential to ensure the longevity and proper functioning of this critical component.