Disc brake discs (discs) are divided into solid discs (monolithic discs) and air duct discs (double-disc discs). The solid disc type is easier for us to understand, and to put it bluntly, it is solid. Vented Disc, as the name suggests, has the effect of ventilation. From the outside, it has many holes in the circumference that lead to the center of the circle, called air ducts. The purpose of heat dissipation is achieved through the air convection at the air duct during the exercise, which is much better than the solid heat dissipation effect. Most of the cars are front-wheel-drive, and the frequency meter of the front disc is worn out, so the front air duct disc and the rear solid disc (monolithic disc) are used. Of course, there are also air duct discs in the front and back, but the manufacturing cost is not outrageous.
The first picture in this article is a perforated scribing disc, which has improved braking performance and heat dissipation, but has great wear on the brake pads. DIY modified brake disc, friendly tips: 1. The material of the disc must be good enough, without too many defects that affect the strength, such as large pores, sand holes, and no shrinkage is allowed. 2. The spacing and size distribution of the holes, etc., because if you drill one more hole, the strength of the hole will be weaker. If the disc breaks, the consequences are unimaginable. 3. Symmetrical equalization. If the balance of the disc is seriously damaged, it will have a certain impact on the spindle during driving. 3. This is a hard project, and it is prudent to be cautious. If you don't have a professional to guide you, it's best not to do it.
Perforated and scribed brake discs, also known as "high-speed discs" or "modified discs", are generally installed in high-performance vehicles, such as racing cars, sports cars or sports cars. With the rise of the modification style in the domestic automobile industry in recent years, there are many car enthusiasts who DIY by themselves, obtain punched and marked brake discs from various ways and then change them by themselves. Punching and marking brake disc is a double-edged sword, his advantages and disadvantages also coexist, but this kind of brake disc will increase the wear of the brake pad, and the material and processing requirements of the brake disc are also relatively high. Many small companies pretend to be brands from European, Taiwan, Japanese and other manufacturers to produce high-imitation brake discs, which requires more attention from many players who like DIY.
The brake disc is a very important part of the braking system, and a good brake disc brakes stably, without noise and shaking. Many DIY players do not have a certain amount of professional knowledge and do not replace the brake disc by themselves, because the original brake disc has been tested by many professional engineers and can fully withstand the braking force of their own car. Sometimes, after replacing the perforated and scribing brake disc, the braking effect may not necessarily be better than the original ordinary disc. Therefore, when it comes to safety, the total parts and components also need to be cautious when modifying.
In addition, there is a disc that integrates HUB, ABS ring, assembly bolts, bearing skins, etc., generally called bearing discs, and is used in larger vehicles such as trucks.
Drum brakes have a tambourine shaped iron casting, called a brake drum, which is fixed to the tire and rotates at the same speed. Disc brakes have the advantages of better responsiveness and stability, better heat dissipation, and easy replacement. Drum brakes are less expensive and have higher absolute braking power, and are often used in the rear wheels of small cars. However, the wear rate is higher, so the overall cost is higher at the same time.