Brake discs: features and service life
Unlike pads, brake discs last much longer. In most cases, they are changed after 80 thousand kilometers. precisely, the service life is indicated in the technical documentation of a specific model, however, these data are also conditional.
Manufacturers use different technologies and materials, which affects the rigidity and strength of various wheel modifications. The intensity of wear depends on the quality of the pads, driving style, road conditions, weather conditions and other factors.
Replacing brake pads and discs
The braking system, in particular pads and discs, is one of the most loaded and intensively used vehicle components. The theoretical replacement frequency is usually indicated in the manuals for specific machine models.
However, in practice, everything is different. they need to be changed as they wear out, the intensity of which depends on the material of manufacture, atmospheric conditions, the state of the road surface, driving style, etc.
There is nothing complicated in the design of brake pads: these are steel plates, to which special linings are attached made of high-strength materials that are resistant to friction and temperature changes.
Brake pads: when replacement is required?
A characteristic sign of the development of braking devices will be a specific sound during intensive braking. After erasing the pads, the sensor plate emits a characteristic squeak when in contact with the surface of the disc. The design of most foreign cars provides light indicators, which are connected through contacts mounted in the pads of the pads.
If the machine does not have any mechanical or other means of signaling the condition of the brakes, their wear should be periodically checked by measuring the size of the linings of both the rear and front wheels, excluding the metal base. Replacement is required if one of the overlays is less than 1.5 /.0.5 mm thick. If the car has alloy wheels with large holes, this check will not be difficult to perform visually, even without removing the wheels.
Brake pads: features and replacement intervals
Manufacturers indicate in the technical documentation how long their products will last, but this information is purely advisory in nature. You can roughly determine how often you will need to buy new consumables in advance.
On average, the brake pads are replaced at the following mileage:
- domestic cars: 12 /.3 thousand km;
- imported cars: 17 /.3 thousand km;
- sports cars: 5 /.1 thousand km.
Brake discs: when you need replacement?
To know when to change brake discs, you should regularly check their condition. Excessive wear may result in the following abnormalities in the machine:
- Increased braking distance;
- Decrease in the level of the working fluid;
- Relief pedal;
- “Driving” to the side when braking;
- Abnormal wheel noise.
If one of the above deviations occurs, it is necessary to check the condition of the brake system. In this case, special attention should be paid to both discs and pads. It is best to entrust this to qualified specialists of the service center.
A systematic check of the brake discs is required on both the front and rear wheels. In addition to the surface condition, you need to measure their thickness with a caliper. The operating range is usually indicated on the back of the disc.
Note. Replacing discs, as well as pads, regardless of which of the mechanisms found unacceptable wear, must be done on one axle only in pairs.
How to tell when to change brake discs and pads
The braking system is almost the most important device in any car. However, even experienced drivers sometimes have questions about the nuances of servicing the brake system.
How to determine the degree of wear on brake discs and pads?
The rubbing parts of the brake system (pads and discs) are so-called consumables that need eye and eye. In particular, to control the wear of the brake pads, most cars are provided with “squeaks” (a metal plate, which, if the pad is badly worn out, begins to scrape the disc and emit a specific sound). In addition, some cars are equipped with pads with wear sensors: when the pads are worn out (the minimum thickness is about 1-2 mm), the on-board system will notify you of the need to replace them. However, it is most correct to periodically (at least once every 10,000 km) check the thickness of the pads and discs yourself. And if the thickness of the pads can be determined, as they say, “by eye”, then to measure the disks you will need a caliper and a machine manual, which contains the corresponding tolerances of the automaker (usually at least 10 mm).
Are there average intervals at which you need to change the brake pads and discs?
The service life of brake pads and discs directly depends on the driving style, as well as on the weight of the car and its other design features. On average, when operating the car in urban mode, the front pads are “enough” for 20-40,000 km, and the rear ones are one and a half times more (the front pads are more loaded). At the same time, the mileage of linings in drum brakes is approximately 150 thousand km.
As for the brake discs, they usually “go” more than 100,000 km. In this case, it is necessary to control not only the thickness of the brake “pancake”, but also its working surface. Cracks can appear on it, which reduce the effectiveness of vehicle deceleration and provoke vibrations.
What does the untimely replacement of pads and discs lead to??
Untimely replacement of discs and pads, in addition to the risk of mechanical breakdown of “consumables” and failure of the brake system, can lead to failure of the brake calipers: when the total thickness of the disc and pads decreases, the brake piston moves out of the caliper body by a large amount, which can lead to its distortion and jamming.
Do I need to change the brake fluid after each replacement of pads or discs?
Replacing pads and discs is not directly related to replacing brake fluid. And it should be changed in accordance with the regulations established by the manufacturer (best of all. once every two years or every 30 thousand km).
How to change the pads on the rim brakes yourself?
If special cables extend from the handlebar brake lever to the wheels, then the bike has a rim brake system. It can be of several types, each of which requires its own approach to work.
- v-brake. To get started, you need to collect all the levers. As a result, a groove is formed, from which it is necessary to pull out the tip of the “shirt”. It is simple to define it: it is from it that the cable comes out. Then remove the old pads by carefully removing the fasteners and put new ones in their place, carefully fixing them.
Sometimes pads of this type are “versatile”, that is, left and right. Manufacturers usually indicate this directly on the details. When installing them, you should be a little more careful.
- Cartridge type. Only the rubber seals are changed here. To do this, remove the cotter pin fixing the pads, then perform a simple procedure to remove the worn out gasket and install a new one on the vacant space.
When replacement is required?
You can not miss the moment of changing the brake pads if you keep track of the mileage. As a rule, these parts wear out completely, having served their owner 15 thousand km. Although now there are those that are enough for 30 thousand km. However, these numbers are just a convention. The life of the pads depends on many factors.
Riding style will play a decisive role: the more aggressive it is, the more difficult climbs and dizzying descents a cyclist overcomes, the sooner he will have to think about working with the brakes.
Walking slowly through the park in a relaxed manner will allow the entire braking system to last longer, but only if they are correctly adjusted.
How to change the pads on a bike?
A modern bicycle, as a serious means of transportation, requires constant maintenance. Brake pads especially need attention. Having worn out, they will not allow you to quickly stop the movement. This can lead to very dire consequences.
Although replacing brake pads does not require much skill, even a beginner cyclist who has never changed them on his own can do this operation.
4 Mistakes During Disc Brake Pads Replacement On Your Bike.
How to know when it’s time to change pads?
Don’t wait until it becomes more difficult to stop the bike. It is better to inspect the pads in advance. Outwardly, it will become clear that their service life is over.
Manufacturers deliberately make their surface uneven by providing it with protrusions or spikes.
The more they are erased, the closer the hour when they cease to perform the functions assigned to them.
The process of replacing pads for different types of brake systems is not the same. However, difficulties should not arise even for those who have never changed them on their own before.
How to change the pads on the disc brakes yourself?
If braking occurs with a special disc, then we are dealing with a disc braking system. Many cyclists consider it to be more advanced. Apparently the manufacturers, too. How else to explain the fact that the bicycles supplied by her are more expensive.
Disc brakes are more convenient not only on the road, but also in maintenance. To change the pads, first remove the caliper. When braking, it clamps a disc that is mounted directly on the wheel and rotates with it. The necessary parts are installed in it.
- To do a good job, the caliper must be removed.
- Carefully deal with all fasteners: wiring, retaining rings and bolts.
- Then remove the old pads and put on the new ones. All that remains is to fix them, put the caliper in place and check if the replacement is correct.
To do this, press the brake lever several times, making sure that nothing interferes with the bike’s progress.
There are several rules, observing which, you can afford to carry out the work described above as rarely as possible:
- The brake must be carefully adjusted and it must be ensured that the pad does not permanently pinch the rotor. It is easy to feel this: such a situation will certainly affect the movement of the bicycle, making it difficult;
- You should choose quality parts from trusted manufacturers;
- Avoid situations where emergency braking is required.
How often to change brake pads?
The question is not simple, requiring serious analysis and reflection. If you have a strong aura, there is a protective biofield and you are immortal, then in this case it is necessary to change, because the life of people passing by, passing by, and in the end, people next to you depends on it. The requirements for the braking system are written out by a multitude of lives lost in accidents, injuries and incalculable moral and material damage. Statistics know a lot, for example, the braking distance at different speeds. Exclusively for reference. at a speed of 60 km / h on an absolutely dry and, attention, flat and clean road, the car drives 17 meters to a complete stop. this is with a fully functional braking system. When road conditions change or malfunctions in the braking system, this figure increases significantly.
When to change brake pads?
So, brake pads are a serious component of the brake system, you can say its cornerstone, therefore, their condition must be monitored and changed in time. There is such a book. a car manual, where the procedure for replacing the pads is indicated. from 15 to 20 thousand km of the front, the rear is usually twice as much. This is not an axiom, but a RECOMMENDATION. If the road surface is poor, you can call our directions roads only in delirium, bad weather conditions. we also have winter, as well as driving manners and experience, the service life of the pads is really less, somewhere between 10-12 thousand km, not to mention sports cars and off-road vehicles. amateurs driving on absolute off-road. here you have to divide by two more.
But you shouldn’t be guided by this run either. There are a number of signs that can help you determine when to replace. Ever notice black dust with metal particles on wheel rims? These are they, blocks. And sometimes a caressing, though there is also a blood-curdling squeak, which later turns into a grinding sound, is it familiar? It becomes very alarming in my soul when, when you press the brake pedal at a speed of 60–80 km / h, it gives off to the leg with some incomprehensible jerks. But obviously not ABC, otherwise it will suddenly become stiff so it’s hard to push. All these are messengers informing the car owner about the need to check the brake system. Well, suddenly the level of the brake fluid has dropped significantly or, God forbid, of course, the red sensor on the instrument panel has lit up. here, without hesitation, you need to go to the MOT of the car.
It’s up to you to decide where to do it, but you must remember that good brakes are the key to your comfort, and most importantly. SAFETY. With the disgusting condition of our roads (special thanks to Ukravtodor), when the driving style becomes very nervous, quarterly maintenance, with constant operation of the vehicle, becomes simply necessary. Who to contact? To professionals and only to them.
When To Replace Disc Brake Pads | Tech Tuesday #107
How to choose and where to replace brake pads
When choosing brake pads, it should be borne in mind that brake pads can be soft. then wear is faster, they need to be changed more often, hard ones. discomfort. Our specialists will select exactly what your car needs, and the mechanics will quickly and efficiently deliver exactly where it is needed in compliance with all technical standards. many modern cars require a computer program to replace the brake pads. We have it.
In our car service you can also get other services for the maintenance of the brake system:
The OILER company is an excellent replacement for the official service. Here we are able to provide a full range of services for the repair and maintenance of your car. As for the brake pads, the company’s managers will select the right pads that are suitable for your car (the pads must match the brake discs not only by the brand, but also by the composition of the mixture, the material of manufacture) and the brake system will start working effectively again.
Factors Affecting Brake Pad Wear Rate
The life of the brake pads for each individual vehicle, driving style and operating conditions can vary significantly. In addition, changing the rear brake pads as often as the front is not necessary in most cases.
, rear brakes are usually drum-type, and in them the pad life is higher. with the same design of brakes on all four wheels, the front axle of the system undergoes heavy loads and often requires maintenance.
Consider the main factors affecting the rate of wear of the brake pads:
- Shoe design. Much depends on the shape of the pad, the area of contact with the disc or drum, and the thickness of the friction layer. Massive pads with a large contact area are more durable.
- The material used in the manufacture of the friction lining. Ceramic pads are considered more durable than others; organics have the smallest resource. Metallic options hold an intermediate position.
- Driving style. Aggressive acceleration and hard braking significantly reduce the life of the friction linings.
- Operating conditions. Preferred driving in city, mountainous areas or other conditions where brakes are frequently used will reduce pad life. Extremely low or high ambient temperatures are also negatively affected.
- Gearbox type. On a mechanical box, the driver of which uses engine braking competently or uses “neutral”, the pads will last longer than the driver with. which is deprived of these possibilities.
How to choose brake pads from all the available variety of offers with the maximum resource and at a low price? There is no definite answer here. Much in this matter depends on external factors.
How often do you need to change the brake pads?
Car owners often face the consequences of untimely replacement of brake pads. In the best case, grooves remain on the working surface of discs or drums from friction of a metal plate with a worn out friction layer. At worst, damaged elements have to be replaced. Let’s try to figure out how often the brake pads need to be changed and what affects the mileage between successive replacements.
How often do you need to change brake pads: general recommendations
Many manufacturers recommend to carefully inspect the front brake pads at each regular maintenance: some of them do not always develop even half the resource after 10 thousand km of run, and on drum wear for the same mileage it can be only 5-10%.
But how often do you need to change your front brake pads? There are no exact indications on the replacement time here and cannot be. It all depends on the factors listed in the first part of the article. However, there are a number of general recommendations, following which will allow you to choose a more appropriate moment for replacement:
- Be sure to check the condition of the brake pads at every service. Most often, disc pads are enough for 1-3 cycles, or 10-30 thousand kilometers. Drum drums last up to 5 times longer.
- Pay attention to both the outer and inner shoe. Wear is usually uneven, so focus on the more worn pad. The residual thickness of the friction lining must be at least 2 mm.
- If there are extraneous sounds (squeak, grinding), vibration or a subjective feeling that the brakes have become less effective, be sure to check the condition of the pads.
- If the car has brake pad wear sensors, watch the dashboard. Or listen for sounds when braking if the shoe has a mechanical sensor that emits a characteristic squeak during critical wear.
Do not bring the wear of the brake pads to the metal plates. It is better to replace them in advance during maintenance, if, judging by the residual resource of the lining and the dynamics of wear, there is a possibility that the pads will not last until the next scheduled service. This will keep discs and drums in good condition, which are quite expensive.
When to change pads on a bike?
Each technique sometimes requires special attention. Often some consumables need to be replaced. At the time when to go to change the brake pads?
A bicycle only at first glance seems to be an uncomplicated and unpretentious vehicle. In fact, in addition, in the aggregate of stopping this vehicle, there are a couple of types of brakes, in particular the main six:
The modern manufacturer is much more likely to use the latter type of all the above. All others, apart from rims and discs, are rarely seen anymore.
From year to year, the fashion for bicycles and sports is increasing. A person gets tired of constantly sitting (at a table in the workplace, driving a car, when traveling in public transport, and, usually, at home in front of the TV). At these moments, one recalls a carefree childhood, which was accomplished at the wheel of a two-wheeled friend, and many get on their bicycles again.
How to take care of the replacement of spare parts on your own and, most importantly, realize at the time when it needs to be done?
Apart from the V-brake, a modern manufacturer cannot do without rim and disc assemblies. With regular use of the bike, the brake pads quickly deteriorate. This can lead to unpleasant consequences not only for the owner of the vehicle, but also for those around him.
In addition, if misused, the wheel rim may need to be replaced. The wear of the pads is very easy to track, besides, for a beginner, they have special grooves, which become less noticeable as they wear off. In addition, disc brakes (mainly on racing bicycles) have iron pads, which contribute to disc wear.
The slotted rotor will be the most reliable option in the application. It will not lead to brake disc backlash or, on the contrary, to its jamming.
The brake caliper also requires attention to itself, its pistons can begin to seize if a large amount of dirt accumulates in them. This leads to the fact that the pads are no longer supplied to the rotor evenly, which worsens the main braking processes. For prevention, it will not be enough to sort out and clean the caliper.
This should only be done occasionally, for example, once every three years. At one point, with the fact that you clean the caliper, go to bleed the brakes. On bicycles, over time, its handle can start to fail, then it is still necessary to replace the o-rings. It is also necessary to ensure that the rotor does not rub against the pads.
If this happens, then it is possible to adjust the caliper.
If the bike starts to stop slower and the brake lever starts to fail, this is the main indicator of the need to replace the pads on a two-wheeled technical device. Previously, it is possible to do with pumping, and only if this does not help, change the pads.
A modern manufacturer uses the main two types of pads:
The former are more durable. In addition, they are resistant to high temperatures and humidity. But they can only be installed on disc brakes.
The advantage of the latter will be tenacity and noiselessness when stopping transport.
He will serve you longer, and will be a surety of safety for you and those around you.