What is a Thrust Bearing and Where is It Located?
2 Answers
Thrust bearings, also known as pressure bearings, specifically refer to the thrust bearings of shock absorbers, which are commonly found in MacPherson suspension systems of vehicles. Thrust bearings are installed at the top of the shock absorber, positioned between the spring and the shock absorber top mount, bearing vertical pressure while allowing free rotation. The thrust bearing of the shock absorber is located at the top of the shock absorber, together with the shock absorber top mount. Once the thrust bearing is damaged, the shock absorber top mount will also be damaged, affecting the vehicle's ride quality and driving safety. Several symptoms of thrust bearing damage include: 1. Abnormal noises from the vehicle's shock absorber during operation; 2. Slight deviation in the vehicle's steering direction, difficulty in returning to center, and weak return force; 3. Increased noise.
The plain bearing is actually a small but crucial component, which I came to understand after encountering multiple issues while driving. Essentially, it's a type of ball or sliding bearing that allows the suspension system to rotate smoothly, reducing friction and wear, and preventing steering stiffness. It's located in the front suspension system of the car, specifically on the top bearing mount of the MacPherson strut. If you feel the steering wheel is heavy or hear unusual noises like a 'creaking' sound while driving, it might be due to dirt ingress or insufficient lubrication causing wear. I once repaired it myself—after disassembling the shock absorber, you can see it tightly installed there. Failing to replace it in time can affect the suspension's lifespan and even lead to uneven tire wear. Therefore, I recommend car owners regularly inspect the suspension, especially after driving on rough roads, to clean off dirt and apply lubricant. Though small, this component is vital for driving safety and comfort.
