What you don't know about brake pads (Part 1)
1. Is the ceramic fiber added to the brake pad formula a ceramic formula?
no. Ceramic fiber is just one of the commonly used fibers for brake pads. There are also metal fibers, mineral fibers, wood fibers, aramid fibers, etc. Their function is to connect various fillers, just like the mud walls in rural areas. Like straw.
2. What is the noise of the brake pads?
Noise is mainly frequency resonance. If the natural frequencies of two materials or components are the same, resonance will easily occur. It is very simple to solve the noise of the brake pad alone, it is very simple to solve the service life alone, and it is also very simple to solve the problem of not hurting the disc alone. There are many factors that cause noise. The entire brake assembly system is the cause of noise. Improper selection of brake discs and serious disc wear can cause noise. In many cases, everyone has wronged the brake pads.
3. I feel that the one with more metal content is harder, and the harder it is, there must be more noise. Some auto repair shops say the same, right?
wrong. Many of these claims are from auto repair shops, which are not scientific. The original car of the United States is mainly semi-metallic, which contains a lot of metal. Have you heard a lot of noise? Noise is not directly related to softness and hardness. The grinding disc and noise just indicate that the product formula is immature and has nothing to do with the amount of metal.
In fact, metal materials in the formula mainly play the role of connecting fillers and heat conduction. At the same time, their own hardness is not much different from that of discs, and will not cause major wear to discs. It is not what you see that really grinds discs and increases braking capacity. The metals you see are the abrasive fillers that you can’t see, which are harder than the brake discs. They are actually corundum, which is the same material as your common sandpaper and grinding wheels.
4. Why are there grooves on some discs? Are the brake pads hard?
There are national standards for the hardness of brake pads, which are basically between 35 and 70 Shore hardness. This hardness is not the main cause of wear on your brake discs. The wear-increasing agent in the brake pads is the main component of the wear disc. Soft and hard brake pads are not the cause of severe disc wear, the culprit is low-cost wear additives.
