The brake disc is a critical component of the vehicle's braking system, and its working condition is directly related to the safety performance of the vehicle. Therefore, vehicle owners should regularly inspect and replace the brake disc to ensure optimal braking performance. But how can one determine if the brake disc needs to be replaced? Here are some simple methods introduced by a brake disc machine manufacturer.

Firstly, the condition of the brake disc can be judged by listening to the sound it makes. If a metal friction sound is heard between the brake pads and the brake disc when lightly stepping on the brake, it may be that the brake pads are worn out to the limit, or there are foreign objects or scratches on the surface of the brake disc. In this case, the brake pads or brake disc should be inspected and replaced promptly to avoid affecting the braking effect or damaging other components.

A severely worn brake disc

Secondly, the condition of the brake disc can be judged by checking the instrument panel light. Some car instrument panels have a dedicated indicator light that monitors the condition of the brake disc, which is usually in the off state. When the brake disc wears to a certain extent, this indicator light will light up to remind the driver to replace the brake disc. If this indicator light is seen to light up, it should not be ignored, and the vehicle should be taken to a repair shop for inspection and replacement as soon as possible.

Brake Warning Light

Thirdly, the condition of the brake disc can be judged by measuring its thickness. The brake disc will wear continuously during use, leading to a reduction in thickness. Generally, when the total wear depth of both sides of the brake disc reaches 2 millimeters, a new brake disc needs to be replaced. In addition, some brake discs have a limit groove on the surface, and when these grooves are worn flat, it also indicates that the brake disc has reached the end of its lifespan. A spiral micrometer or other tools can be used to measure the thickness and groove depth of the brake disc.

Thickness comparison of new and old brake discs

Lastly, the condition of the brake disc can be judged by calculating its usage period. Different car brands and models have different maintenance periods for the brake disc, generally between 60,000 and 100,000 kilometers. The recommended maintenance period can be found in the owner's manual, and based on the individual driving mileage and habits, the decision of when to replace the brake disc can be made. If the brakes are frequently used in situations such as mountain roads, heavy loads, or high-speed driving, the replacement period should be shortened.

Determine when to replace the brake disc based on the mileage

These are some simple and effective methods shared by a brake disc machine manufacturer for judging the condition of the brake disc. We hope this will be helpful to you.