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刹车片表面为何有沟槽 - Why is there a groove on the brake pad?

作者:广州星展汽车配件有限公司 浏览: 发表时间:2019-04-10 14:49:30

刹车片表面为何有沟槽

如果你是“老司机”,如果你善于观察,就会发现不同刹车片的外观有一些区别,例如有些刹车片表面有一条沟槽,边缘有倒角,而有些刹车片则没有。那么,这些沟槽和倒角的作用是什么呢?


沟槽的作用

 刹车片表面的沟槽,可以将刹车片和刹车盘磨损产生的粉末碎屑迅速排出,避免碎屑附着在刹车片和刹车盘之间的摩擦表面上,导致刹车盘被划伤和影响刹车效果。


?  刹车片表面的沟槽可以改变刹车片的固有频率,有利于消除刹车时的噪声,刹车片边缘的倒角也有这种作用。


 刹车片表面的沟槽可以加快空气流动,使摩擦产生的热量更快散发出去,以免影响刹车效果。


 刹车片表面的开槽可以使雨水迅速排出,这也就增大了雨天刹车片和刹车盘之间的摩擦力,改善雨天和涉水行驶时的刹车性能。


倒角的作用


刹车片通常在使用了3万-5万公里左右更换,实际更换里程与驾驶习惯和刹车片质量等因素有直接关系。


?  更换刹车片时,刹车盘表面会有因磨损产生的沟槽,更换的新刹车片与旧刹车盘无法紧密贴合,配合工作时就会产生异响。因此,为了降低出现刹车异响的几率,有些新刹车片边缘就会加工出倒角,倒角可以使新刹车片与旧刹车盘边缘的凸起台阶错开。


?  有些刹车片边缘并没有倒角,如果刹车盘表面因磨损产生的沟槽和凸起并不是很深,新刹车片与旧刹车盘磨合一段时间后,也可以实现良好的刹车效果。如果刹车盘表面的沟槽已经达到更换标准,则应及时更换,否则会缩短新刹车片的寿命,并影响刹车效果。


需要谨慎对待的操作 


在实际的车辆维修工作中,有些维修人员会使用工具在刹车片表面开槽或倒角,这种操作应谨慎对待


?   首先,刹车片的生产遵循着严格的加工工艺刹车片形状和表面处理工艺均有严格的质量标准,才能达到刹车性能要求。如果擅自改变刹车片表面形状,例如开槽,就会影响刹车片摩擦材料的强度,甚至导致摩擦材料破损或脱落,造成严重的后果。因此,不建议在安装环节对刹车片表面采取开槽等改变刹车片表面形状的操作。


?   对于更换刹车片后出现异响的故障,有些维修人员采取打磨刹车盘表面或对刹车片边缘倒角的维修方式,这些操作有时可以排除故障。但是,有些维修人员使用砂轮等电动工具对刹车片倒角,这样无法实现精确的操作,而且可能会降低刹车片摩擦材料的强度,从而留下安全隐患。因此,对于沟槽较深的刹车盘,应在更换刹车片时同时更换,以达到良好的刹车效果,并降低刹车异响出现的几率。



刹车片表面是否有沟槽或倒角,通常是刹车片生产厂家的设计理念不同而已。只要是正规厂家生产的刹车片产品,都已满足相关行业标准,可以放心使用。


作为摩擦领域全球的主要制造商之一,Remsa提供高质量的刹车片产品,覆盖了欧美日韩和澳大利亚等主流车系。




Why is there a groove on the brake pad?


If you are an “veteran driver”, or if you are a good observer, you will find some differences in the appearance of different brake pads. Like, some brake pads have a groove on the surface and a chamfer on the edge, but other brake pads do not. So what are the functions ?

Function of the groove

?  The groove on the surface of the brake pad can quickly discharge the powder debris generated by the friction between the brake pad and the brake disc to prevent the debris from adhering to the friction surface between them, which would result in scratches on the brake disc and affect the braking effect.


?  The groove on the surface of the brake pad can change the natural frequency of the brake pad, which helps to eliminate the noise during braking. The chamfer on the edge of the brake pad also has this function.


?  The groove on the surface of the brake pad can speed up the air flow, so that the heat generated by friction is dissipated more quickly, so as not to affect the braking effect.


?  The groove on the surface of the brake pad allows the rain to drain quickly, which increases the friction force between the brake pad and the brake disc on rainy days and improves the braking performance when it is raining and when wading through the water.

Function of the chamfer

Brake pads are usually replaced about every 30,000-50,000 km. The actual mileage interval is directly related to driving habits and brake pad quality.


?   When the brake pads are replaced, you will see dents on the surface of the brake disc due to wear. The new brake pads cannot be closely fitted to the old brake discs, and abnormal noise will occur when they are working in concert. Therefore, to reduce the chance of brake noise, some new brake pads are chamfered at the edge, allowing the new brake pad to be staggered from the raised steps on the edge of the old brake disc.


?   Some brake pads are not chamfered. If the dents and bulges due to wear on the surface of the brake disc are not deep, the new brake pad and the old brake disc can also achieve good braking effect after running for a period of time. If the dents on the surface of the brake disc have reached the extent requiring replacement, it should be replaced in time, otherwise the life of the new brake pad will be shortened and the braking effect will be affected.


Operations need to be treated with caution 

In practice, some maintenance personnel use a tool to make a groove or chamfer on the surface of the brake pad. This should be treated with caution.


?   First of all, the production of brake pads follows strict processing techniques, and the brake pad shape and surface treatment process must reach strict quality standards in order to meet the braking performance requirements. If the surface shape of the brake pad is changed unilaterally, such as making grooves, it will affect the strength of the brake pad friction material, and even cause the friction material to break or fall off, causing serious consequences. Therefore, it is not recommended to make a groove or otherwise change the surface shape of the brake pad during installation.


?   For abnormal noise from brake pads after replacement, some maintenance personnel grind the surface of the brake disc or chamfer the edge of the brake pad. These operations can sometimes eliminate the noise. However, some use a motor driven tool such as a grinding wheel to chamfer the brake pad, which does not allow for precise operation, and may reduce the strength of the brake pad friction material, thereby creating a potential safety hazard.Therefore, the brake disc with deep dents should be replaced at the same time when the brake pad is replaced to achieve good braking effect and reduce the chance of abnormal brake noise.



Whether there is a groove or chamfer on the surface of the brake pad is usually just due to different design concepts of different brake pad manufacturers. As long as it is a brake pad product produced by a proper manufacturer, it has already met the relevant industry standards and can be used with confidence.


As one of the world’s leading manufacturers of friction, Remsa offers high quality brake pads covering mainstream vehicle series in Europe, America, Japan, Korea and Australia.


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