Brake disc wear - when does it get dangerous?

To the Wear limit a brake disc, the manufacturer specifies the minimum thickness. This information is usually in millimeters on the pan or on the Outer edge of the brake disc stamped. The specification is included MIN TH for the Minimum thickness. So for the minimum thickness or the minimum size that the brake disc may have.

Brake disc wear

Verification: The limit of the wear of the brake disc can be adjusted with a suitable tool, the so-called Brake disc measuring gauge check. For this purpose, the measuring gauge is applied and distributed at various measuring points and locations over the friction ring measured. Then the measurement results are compared and the lowest value compared to the nominal value (minimum thickness). Becomes the setpoint achieved or fallen below, is a replacement the brake disc is necessary.

Note on repairs: Brake discs should always in pairs replaced, whereby new brake pads may only be installed if the brake disc thickness is not below the minimum thickness. The information in the repair and maintenance instructions of the respective vehicle manufacturer should also be observed.

And finally ... Brake disc wear

What is decisive is that given by the manufacturers Minimum sizethat a brake disc must have, the so-called "minimum thickness". This is marked with "MIN TH"Abbreviated and is as already mentioned at the beginning of the article, on the disc cup or on the edge of the brake disc a DAK Bungalow. Two to three millimeters Wear and tear are usually fine. The natural wear and tear of the disc can be recognized by the fact that there is a a tangible ridge forms. This is because the brake disc only wears out where the brake pad engages. And that is on the very edge CAN'T the case. The thicker the burr, the more worn the brake disc is. With the help of special measuring devices, the professionals measure the thickness of the brake discs.

How long do brakes last on average?

Unfortunately, for the service life of brake discs and pads save provide general information. Because this mainly depends on factors such as Vehicle weight, driving style or material from. When it comes to the life expectancy of the brakes, it is equally important whether the vehicle is driven a lot on the motorway or in the city. The fact is that brake pads and brake discs wear out over time, as they convert kinetic energy into thermal energy through friction.

However, with a cautious and forward-looking driving style, it is quite possible 100.000 kilometers and more to cover with a set of brake pads. However, drivers with a sporty driving style have to change significantly earlier. Intervals of 10.000 to 15.000 kilometers are also not uncommon. The same applies to the brake discs: The more these are used, for example by frequent and strong braking maneuvers, the sooner they have to be replaced.

When does a brake pad change make sense?

When the remaining topping less than two millimeters thick, the brake pads should be changed at the latest. Nowadays most of the cars are with Wear indicators equipped, which indicate to the driver when it is time to change. Electronic systems indicate wear and tear by means of a warning light on the dashboard. Purely mechanical variants announced that the wear limit was reached with the help of a metal pin embedded in the covering and an unpleasant associated with it Squeaking noise at. This occurs when the metal pin rubs against the metal of the brake disc.

Of course, that wasn't the end of it!

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