The brake disc is the core component of the car's braking system, and its working condition directly affects the safety performance of the vehicle. Therefore, car owners should regularly check and replace the brake disc to ensure the braking effect. So, how to determine whether the brake disc needs to be replaced? Below, a Brake disc CNC lathe manufacturer will introduce several simple methods for everyone.

A severely worn brake disc

Firstly, the condition of the brake disc can be judged by listening to the sound. If you hear a metal friction sound between the brake pad and the brake disc when lightly pressing the brake, it may be that the brake pad has worn to the limit or there is foreign matter or scratches on the surface of the brake disc. At this time, the brake pad or brake disc should be checked and replaced in time to avoid affecting the braking effect or damaging other parts.

Secondly, the condition of the brake disc can be judged by looking at the dashboard light. Some car dashboards have a dedicated indicator light to monitor 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 owner to replace the brake disc. If you see this indicator light light up, do not ignore it, and you should go to the 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, causing the thickness to decrease. Generally, when the total wear depth of both sides of the brake disc reaches 2mm, a new brake disc needs to be replaced. In addition, some brake discs have wear limit grooves on the surface. When these grooves are worn flat, it also indicates that the brake disc has reached its life limit. 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

Finally, 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. You can refer to the suggestions in the maintenance manual and decide when to replace the brake disc based on your driving mileage and habits. If the brakes are frequently used in situations such as mountain roads, heavy loads, or high-speed driving, then the replacement period needs to be shortened.

Determine when to replace the brake disc based on the mileage

The above are several simple and effective judgment methods shared by a Brake disc CNC lathe manufacturer. I hope it will be helpful to everyone.