How to determine the thickness of brake pads
[Catalog:News] [Date:2023/4/14] [Hits:] [Return]
At present, the braking systems of most household cars on the market are mainly divided into disc brakes and drum brakes. Disc brakes, also known as "disc brakes," mainly consist of brake discs and calipers. When the wheels are working, the brake disc rotates with the wheels; When the brake is working, the brake caliper pushes the brake pads against the brake disc to produce braking. A drum brake is a brake drum composed of two bowls, which is equipped with brake pads and return springs. When braking, the brake pads inside the brake drum expand, and the friction generated by the brake drum achieves the effect of deceleration braking.
The brake pads and brake discs are two very important components in the automotive braking system, and their normal operation can be said to be related to the safety of passengers. Today we will teach you how to determine the thickness of the brake pads and whether they should be replaced.
How to determine if the brake pads should be replaced?
We often hear people say that brake pads need to be replaced after 50000 to 60000 kilometers, and even some say that brake pads need to be replaced after 100000 kilometers. Actually, these statements are not rigorous enough. As long as we simply use our brains to think, we can understand that there is no accurate number for the brake pad replacement cycle. There will definitely be significant differences in brake pad wear among different drivers. The brake pad replacement cycle of vehicles driving on urban roads for a long time is significantly shorter than that of vehicles driving on highways for a long time. So, when do you need to replace the brake pads? The editor listed several methods that can be self tested.
Determine the thickness of the brake pads
1. The thickness determines whether the brake pads should be replaced.
For most disc brakes, we can visually observe the thickness of the brake pads. In long-term use, the thickness of the brake pads will become thinner and thinner with continuous friction during braking.
Generally, the thickness of a brand new brake pad is around 37.5px. If we observe the thickness of the brake pad with the naked eye, it is only about one-third of the original thickness (about 12.5px). We need to regularly observe its thickness changes.
The remaining 7.5px needs to be replaced (technicians can use calipers to measure during maintenance).
The service life of brake pads is generally around 40000 to 60000 kilometers, but the harsh vehicle environment and aggressive driving style can shorten their service life in advance. Of course, some models cannot see the brake pads with the naked eye due to the design of wheel hubs or brake calipers (drum brakes cannot see the brake pads due to structural reasons), so we can ask a repairman to remove the wheels and inspect the brake pads every time we maintain them.
Determine the thickness of the brake pads
There are protruding logos on both ends of the brake pads, approximately 2-3mm thick, which is the thinnest replacement limit for the brake pads. If the thickness of the brake pads is found to be almost parallel to this mark, the brake pads must be replaced immediately. If not replaced in a timely manner, when the thickness of the brake pads falls below this mark, the brake discs will be severely worn. (This method requires dismantling the tire for observation, otherwise it is difficult for the naked eye to observe. We can request the operator to remove the tire before inspecting it during maintenance.)
2. Listen to the sound to determine if the brake pads should be replaced.
For drum brakes and individual disc brakes where the brake pads are not visible to the naked eye, we can also determine whether the brake pads have been worn thin through sound.
When lightly braking, if a sharp "beep" sound is heard, it indicates that the thickness of the brake pads has worn below the limit markings on both sides, causing the markings on both sides to directly rub against the brake disc. At this point, it is necessary to immediately replace the brake pads and carefully inspect the brake discs, as they are often damaged. (It should be noted that if the brake pedal makes a "squeaking" sound as soon as it is pressed, it can be basically judged that the brake pads are worn thin and need to be replaced immediately. If there is a strange noise when the brake pedal is pressed in the second half, it is likely that there is a problem with the workmanship or installation of the brake pads or brake discs, and separate inspections are needed.)
When braking, the continuous friction between the brake pads and brake discs can also cause the brake discs to become thinner and thinner.
The service life of the front and rear brake discs varies depending on the driving mode of the vehicle. In the past, adopting
Simply put, under normal circumstances, the braking distance at a speed of 100km/h is around 40 meters, ranging from 38 meters to 42 meters! The more it exceeds, the worse the brakes! The farther the braking distance, the worse the braking effect of the brake pads.
5. Brake deviation
This situation is very special and may be caused by varying degrees of brake pad wear. If it is judged that the wear level of the brake pads is inconsistent, the brake pads should be replaced.
Understand the causes and solutions of brake deviation.
The brake pads and brake discs are two very important components in the automotive braking system, and their normal operation can be said to be related to the safety of passengers. Today we will teach you how to determine the thickness of the brake pads and whether they should be replaced.
How to determine if the brake pads should be replaced?
We often hear people say that brake pads need to be replaced after 50000 to 60000 kilometers, and even some say that brake pads need to be replaced after 100000 kilometers. Actually, these statements are not rigorous enough. As long as we simply use our brains to think, we can understand that there is no accurate number for the brake pad replacement cycle. There will definitely be significant differences in brake pad wear among different drivers. The brake pad replacement cycle of vehicles driving on urban roads for a long time is significantly shorter than that of vehicles driving on highways for a long time. So, when do you need to replace the brake pads? The editor listed several methods that can be self tested.
Determine the thickness of the brake pads
1. The thickness determines whether the brake pads should be replaced.
For most disc brakes, we can visually observe the thickness of the brake pads. In long-term use, the thickness of the brake pads will become thinner and thinner with continuous friction during braking.
Generally, the thickness of a brand new brake pad is around 37.5px. If we observe the thickness of the brake pad with the naked eye, it is only about one-third of the original thickness (about 12.5px). We need to regularly observe its thickness changes.
The remaining 7.5px needs to be replaced (technicians can use calipers to measure during maintenance).
The service life of brake pads is generally around 40000 to 60000 kilometers, but the harsh vehicle environment and aggressive driving style can shorten their service life in advance. Of course, some models cannot see the brake pads with the naked eye due to the design of wheel hubs or brake calipers (drum brakes cannot see the brake pads due to structural reasons), so we can ask a repairman to remove the wheels and inspect the brake pads every time we maintain them.
Determine the thickness of the brake pads
There are protruding logos on both ends of the brake pads, approximately 2-3mm thick, which is the thinnest replacement limit for the brake pads. If the thickness of the brake pads is found to be almost parallel to this mark, the brake pads must be replaced immediately. If not replaced in a timely manner, when the thickness of the brake pads falls below this mark, the brake discs will be severely worn. (This method requires dismantling the tire for observation, otherwise it is difficult for the naked eye to observe. We can request the operator to remove the tire before inspecting it during maintenance.)
2. Listen to the sound to determine if the brake pads should be replaced.
For drum brakes and individual disc brakes where the brake pads are not visible to the naked eye, we can also determine whether the brake pads have been worn thin through sound.
When lightly braking, if a sharp "beep" sound is heard, it indicates that the thickness of the brake pads has worn below the limit markings on both sides, causing the markings on both sides to directly rub against the brake disc. At this point, it is necessary to immediately replace the brake pads and carefully inspect the brake discs, as they are often damaged. (It should be noted that if the brake pedal makes a "squeaking" sound as soon as it is pressed, it can be basically judged that the brake pads are worn thin and need to be replaced immediately. If there is a strange noise when the brake pedal is pressed in the second half, it is likely that there is a problem with the workmanship or installation of the brake pads or brake discs, and separate inspections are needed.)
When braking, the continuous friction between the brake pads and brake discs can also cause the brake discs to become thinner and thinner.
The service life of the front and rear brake discs varies depending on the driving mode of the vehicle. In the past, adopting
Simply put, under normal circumstances, the braking distance at a speed of 100km/h is around 40 meters, ranging from 38 meters to 42 meters! The more it exceeds, the worse the brakes! The farther the braking distance, the worse the braking effect of the brake pads.
5. Brake deviation
This situation is very special and may be caused by varying degrees of brake pad wear. If it is judged that the wear level of the brake pads is inconsistent, the brake pads should be replaced.
Understand the causes and solutions of brake deviation.