The brake pad is generally composed of steel back, adhesive heat insulation layer and friction block, of which the friction material block plays a key role - when braking, it is squeezed on the brake disc or brake drum to generate friction, so as to achieve the purpose of vehicle deceleration and braking.
According to the formula, brake pads can be divided into asbestos brake pads, Semi-metallic Brake Pads, low-metal brake pads, non-metallic Nao brake pads, Nao ceramic brake pads, etc.
·Asbestos formula brake pads have been basically eliminated
·Various formulations have different performance focuses
·A good formula is the core guarantee for the excellent performance of brake pads
Different formulations have different performance focuses and are suitable for different models.
Generally, metal formula is used for large vehicles and large displacement SUVs of European and American car series. Their design orientation is performance oriented. The brake pads have high friction coefficient, strong friction and high wear rate under high temperature. Under high-speed driving, it has better temperature and wear resistance and braking effect, so the metal formula is more suitable for large cars and European and American cars.
If these models use ceramic brake pads with higher prices, the effect may not be ideal.
Japanese cars tend to be comfortable, and the original film is mainly made of ceramic formula. Because the body is relatively light, the ceramic formula is relatively soft, quiet and has less dust, and the corresponding brake disc is relatively less worn.
If Japanese cars use metal formula brake pads that are not suitable for them, there may be a risk of rollover if the braking force is too strong.
How to select brake pads?
"Buy right, not expensive"
Brake pads with different formulations have different advantages and disadvantages, and brake pads have several important indicators.
The first is the coefficient of friction, which can be roughly divided into four categories.
EE (0.25 ~ 0.35), FF (0.35 ~ 0.45), GG (0.45 ~ 0.55) and HH (0.55 ~ 0.65).
The larger the coefficient, the greater the friction, and the stronger the braking performance.
General family cars use FF level, and the modified brake pads will reach GG level, HH level will be used more in racing cars.
General household vehicles can basically withstand the brake pads with a coefficient of about 0.45, which will not cause too much damage to the brake discs, depending on the actual situation of each vehicle. The larger the friction coefficient, the more direct the feel of the foot, but blindly choosing the brake pad with a larger friction coefficient can sometimes backfire, especially when the original brake disc is used.
If the friction coefficient of the brake pad is too high, it will lead to the phenomenon of "eating the disc". That is to say, the original brake disc will not be able to resist, resulting in a lot of extra wear. If it is exaggerated, the brake will lock up, and the temperature will rise faster. The original brake oil may not work effectively.
Another important indicator of the brake pad is the working temperature. The higher the friction coefficient, the more inclined it is to be used on the track, and the higher the working temperature will generally be.
For example, the working temperature of the original brake pad is about - 25 ~ 420 degrees. If it is competitive, it must reach at least 50 degrees before it starts to work normally. The maximum temperature can reach 700 ~ 800 degrees, and the heat attenuation resistance will be greatly increased.
In other words, if you change a set of competitive brake pads for daily use, the braking force is very weak before the temperature rises. If you live in the north, you should pay extra attention to it. In winter, try to change a set of brake pads with a slightly lower working temperature, which will be safer.
When selecting brake pads, you must fit the actual use situation. The most expensive ones are not necessarily suitable, but the ones that best suit you are the best.
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