What is the difference between a hub and an axle?
2 Answers
Hub is the rotating part that connects the inner rim of the tire to the wheel center through pillars, which is the metal component supporting the center of the tire mounted on the axle. Axle is the component that supports the mechanical rotating body, reduces the friction coefficient during its movement, and ensures its rotational accuracy. The axle is the core part at the center of the hub, bearing the rotation of the hub. Related introduction: 1. Wheel and axle: A system composed of a 'wheel' and an 'axle', which can rotate around a common axis. It is equivalent to using the axis as the fulcrum and the radius as the lever, so the wheel and axle can change the torque moment, thereby changing the magnitude of the torque. 2. Wheel hub: The rotating part that connects the inner rim of the tire to the wheel center through pillars, which is the metal component supporting the center of the tire mounted on the axle. Wheel hubs can be classified by diameter, width, forming method, and material, with a wide variety of types.
As a DIY car enthusiast, I understand the importance of distinguishing between the hub and the axle. The hub is the central disc part of the wheel, securely fixed to the suspension system, with the wheel rim and brake disc attached to it, responsible for bearing the entire weight and rotation of the wheel. The axle, especially the drive axle, is more like a transmission rod, extending from the gearbox or differential, directly transmitting the engine's power to the hub. Simply put, the hub is a stationary mounting point, while the axle is the rotating energy transmitter. In daily driving, if the hub has issues like bearing wear, the wheel will wobble, affecting steering; if the axle fails, you'll feel strong vibrations during acceleration, potentially leading to a breakdown. Regular inspections can prevent problems and avoid hazards on the road. Safety first—don't skimp on these small expenses.
