Complete Analysis of Automotive Brake Disc Knowledge: Understanding Its Function, Replacement, and Maintenance

With the continuous advancement of automotive technology, the brake pads in the brake system often attract the attention of car owners, but the key component of the brake disc is often overlooked. As an important component of car safety, the quality and performance of brake discs directly affect the braking effect of the vehicle. However, many car owners are not very clear about the timing and standards for replacing brake discs, and usually decide whether to replace them based solely on the vehicle's mileage or usage time, which may pose risks. So, how do we determine if it's time to replace the brake disc? Next, we will delve into the relevant knowledge of automotive brake discs.

The brake disc, which rotates with the wheel hub during the driving process of a car, is an indispensable component of the braking system. When the driver steps on the brake, the friction between the brake pads and brake discs generates braking force, allowing the vehicle to slow down or stop. A brake disc in good condition can ensure the stability of braking and will not produce noise or vibration during the braking process. However, the wear and tear of brake discs can be affected by various factors, including the driver's driving habits, the vehicle's load capacity, the material of the brake pads used, and the road conditions during driving. For example, frequent sudden braking, vehicle overloading, brake pads made of different materials, and driving on mountain or congested roads can accelerate the wear of brake discs.

The replacement cycle of brake discs, a common concern among car owners, does not actually have a fixed answer. The lifespan of brake discs is influenced by various factors, including the driver's driving habits, the vehicle's load capacity, the material of the brake pads used, and the road conditions in which they are driven. Therefore, it is not possible to simply provide a replacement cycle that is applicable to all situations. However, car owners can prevent the risk of brake failure by regularly checking the wear of the brake discs. When obvious wear marks or insufficient thickness are found on the brake disc, it should be replaced in a timely manner to ensure driving safety.

Generally speaking, brake pads (i.e. two brake calipers) need to be replaced after driving for about 40000 kilometers, while the replacement mileage of brake discs is usually around 80000 kilometers. However, please note that these replacement distances are not absolute and may be influenced by various factors such as the owner's driving habits and road conditions. In addition, when the warning light of the brake disc lights up, it indicates that the wear and tear of the brake disc has reached its limit and must be replaced immediately. At the same time, it is also crucial to check whether there are deep grooves on the brake disc. If the sum of the thickness of the deep grooves on both sides exceeds 3 millimeters, replacement of the brake disc should be considered. If the frequency of brake pad replacement is high, it is recommended to pay more attention to the thickness of the brake pads. Once excessive wear of the brake disc is found, it should be replaced in a timely manner, because the wear of brake pads and brake discs is often interrelated.

When choosing brake discs, there are several points worth noting: first, ensure that the selected brake disc matches your vehicle model; Secondly, the material of the brake disc will affect its service life and performance. Gray cast iron or alloy cast iron brake discs are more common and have stable performance; In addition, choosing well-known brands and purchasing through legitimate channels is also key to ensuring quality.