Wheel Bearings
Function of Wheel Bearings
Wheel bearings are precision mechanical components located inside the wheel hubs. Their primary role is to allow your vehicle's wheels to rotate freely with minimal friction. They also support the vehicle's weight and absorb the forces generated during driving (acceleration, braking, cornering).
A wheel bearing typically consists of an inner race, an outer race, rolling elements (balls or tapered/cylindrical rollers), and a cage to keep these elements spaced. They are usually lubricated for life and sealed to protect them from contaminants.
Maintenance and Wear Signs of Wheel Bearings
Although designed to last, wheel bearings are subjected to significant stress and can wear out.
Maintenance Tips:
- Modern bearings are often sealed and do not require direct lubrication.
- Avoid severe impacts (potholes, curbs) that can prematurely damage bearings.
- Prolonged immersion in water (deep ford crossing) can sometimes compromise sealing.
Common Wear Signs:
- Humming, growling, or whistling noise: This is the most common symptom. The noise comes from one of the wheels, increases with vehicle speed, and may change intensity or disappear during turns (depending on whether the bearing is loaded or unloaded).
- Play in the wheel: If you lift the wheel off the ground and can move it up and down or side to side, the bearing is likely worn.
- Vibrations: Can be felt in the steering wheel, floor, or the entire vehicle.
- Hub overheating: In advanced cases of wear, the hub may become abnormally hot after driving.
- Abnormal tire wear: A faulty bearing can affect alignment and cause uneven tire wear.
- ABS/ESP warning light activation: On some vehicles, the wheel speed sensor is integrated into the bearing or hub. Bearing failure can affect the sensor signal.
A noisy wheel bearing or one with play should be replaced promptly. Ignoring the problem can lead to complete failure, loss of vehicle control, or even wheel detachment. Konipa offers quality wheel bearings for a safe and durable repair.