The minimum thickness of the brake pads. How to determine brake pad wear

For safe braking of the vehicle meets the brake system. Its health depends on the effectiveness and speed of stop. A number of mechanisms in the brakes big enough and they should all work like clockwork, because the failure of one would entail at least unpleasant consequences. Let's talk about what should be the minimum thickness of brake pads, as well as on how to verify wear.

About the basic types of pads

In recent years the automobile industry has leaped forward. A modern car usually has an advanced braking system is the availability of the systems managed by the computer. This should include ABS, stability control system, etc. Continuous development of machinery leads to progress types of brake pads. There are the following types:

• Semi-metallic friction layer (65% copper, iron powder, wire);
• Friction is a layer of organics (rubber, glass, Kevlar);
• Organic and metal contamination in the ratio of 70/30);
• Ceramic friction layer with small inclusion of copper.

Each of these types has its own strengths and weaknesses. For example, semi-metallic friction layer has good heat transfer, but it quickly wears out and makes a lot of noise during operation. But the lining on the brake pads from organic matter almost no noise and gently work, but in the process emit lots of dust deposited on the wheel disc. It's safe to say that ceramic are the most preferred. Do not make noise and wear out too fast. The only drawback is the high cost.

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Why pads wear out too quickly?

There are some obvious causes of premature lining wear. Constant driving around the city when frequent braking. This leads not only to wear, but also high temperature disk with pads. Many motorists prefer aggressive driving with long and sharp braking. It also leads to a high wear rate. While the quiet ride often contributes to prolonged "life" of the brakes.

If you often ride with a loaded trunk, it rather helps to reduce the load on the front axle and brakes, respectively. In General, the pads on the brake pads it is recommended to change within the time specified by the manufacturer. For the rear axle is typically 40 000 km and front of approximately 20 000 km. Although fail they can both earlier, and later, it is better to carry out regular checks.

When should you replace brake pads?

In Addition to the mileage of the car manufacturers specify the minimum allowable thickness of the friction linings, in which it is necessary to replace. After all, it often happens that you have passed 20-30 thousand km and like new pads or Vice versa, drove a little, and wear is already critical.

Has a value and weight of the car. The less the car weighs, the slower wear of the pads and Vice versa. But in most cases, the minimum thickness of the brake pads on different brands are almost the same and is 2-3 mm.

Sometimes, the critical wear is seen visually without even removing the wheel. In this case, can be reserved in advance set on the same axle. If you turn on the appropriate icon on the dashboard (this option is not on all cars), so, it was an electronic sensor that determines the minimum allowable thickness of the friction linings.

Musical pads and runout

There are few signs that allow to determine the production of linings. If you have recently performed a brake pad replacement, for which the price was surprisingly low, don't be afraid that they will be "music". It speaks to their low quality and insufficient quantity of some element in the composition of the alloy.

But there are also special systems that emit a distinctive sound when it reaches the minimum thickness of the brake pads. This is the sign to the driver that it is time to perform the replacement.

As for such phenomena as wobbling during braking, then it is more serious. Minimal loss on your part - an ordinary replacement pad. In the worst case have to replace the disk or drum. Due to the fact that the beating is the result of uneven pad wear or brake disc, chipping or cracking of the friction layer. Uneven wear, in turn, may be due to low quality of plates or discs. In any case, the situation requires a quick solution.

How not to do

Not every car owner regularly checks your brake system. This leads to various consequences including accidents on the road. It is still good, if you crash into a tree in his yard and what to do if the brakes failed on the highway? Of course, experienced drivers will use engine braking, but not everyone will have time to figure out what is going on.

So, never let the fact that pads the brake pads were worn to the metal. This will lead to damage of the brake disc and eventuallywill bring the system down. Regularly check the condition of the brakes. This is not difficult on their own. It is not necessary to climb under the car every 5 thousand km, but when the time comes, do not be lazy.

What you can conclude?

Here we figured out how to determine brake pad wear. This can be done visually and with a ruler or caliper. If you do not have the time and desire to tackle this issue yourself, leave it to the experts at a HUNDRED.

The Minimum brake pad thickness is 2-4 mm, but allowed, values such as 1.5 mm. If you overlay less - change. If in the valid range, but is coming - preparing for a replacement soon. It should also regularly check the brake discs for wear and overheating. The latter leads to the fact that the disc warps, and the system operates less efficiently, increases braking distance, and you receive a beating. So we figured out when you are replacing the brake pads. The price differs depending on the manufacturer and ranges 800-3500 RUB But don't take the cheapest "music" of the friction lining.