OEM Bus Brakes Pads 0.35~0.45 Friction coefficient Dark Grey Color

OEM Bus Brakes Pads 0.35~0.45 Friction coefficient Dark Grey Color

Commercial Vehicles Brakes Factory Zhengzhou Baiyun Machinery Co., Ltd.

Zhengzhou Baiyun Industrial Co., Ltd., since 1977, is a national high-tech enterprise with main products of brake friction material and brake products. For more than 40 years, Baiyun focus on the R&D, production and selling of brake linings & pads for commercial vehicles and passenger cars, fighting for human traffic braking safety. Till now, Baiyun has become an important supporting supplier and partner of many famous domestic and overseas auto brands. Baiyun has also reached long term strategic cooperation with many famous domestic and overseas auto parts distributors.

Zhengzhou Baiyun Industrial Co., Ltd., is one of the leading auto friction braking enterprise in China, Top 10 enterprises of China Friction Material Industry and member of friction industry association. Baiyun has passed ISO9001 Quality Management System and IATF16949 Auto Industry Quality System Certification. Long-term cooperation is established with international authoritative test organizations such as America LINK and GREEN to test Baiyun brakes regularly. There are more than 1000 models brakes of Baiyun have obtained E-mark certification till now.

Baiyun will insist on the enterprise mission “create value for customers, create happiness for employees” continuously forge ahead, and create a more brilliant future

1, Definition of Vehicle Brakes

Automobile brake pad refers to the friction material fixed on the brake drum or brake disc that rotates with the wheel, in which the friction lining and friction lining block bear external pressure and produce friction effect so as to achieve the purpose of vehicle deceleration.

The braking principle is mainly from the friction, using the brake pad and brake disc (drum) and the friction between the tire and the ground, the kinetic energy of the vehicle into the heat after the friction, the car will stop.A good and efficient braking system must be able to provide stable, adequate and controllable braking force, and have good hydraulic transmission and heat dissipation ability, to ensure that the driver from the brake pedal applied force can be fully and effectively transferred to the main pump and sub-pump, and to avoid high heat caused by hydraulic failure and brake recession.There are two major types of brake systems, disc and drum, but apart from the cost advantages, drum brakes are far less efficient than disc brakes.

2, Kinds of Commercial Vehicles Brakes Of BAIYUN

1), Commercial Vehicle---Drum Brake Linings

What is Drum Brake?

Drum Brake Linings

Drum brake is a brake that uses friction caused by a set of shoes or pads that press outward against a rotating cylinder-shaped part called a brake drum. Drum braking linings have brake drums that rotate with the wheels.

Brake shoes fitted with brake linings (friction material) which press against the drums from the inside to generate braking force (decelerate and stop) are set inside of the drums.

With this system, friction is generated by pressing the brake linings against the inside surfaces of the drums. This friction converts kinetic energy into thermal energy. Drum rotation helps to press the shoes and the lining against the drum with more force, offering superior braking force in comparison with disc brakes. On the other hand, it is very important to design the components so that the heat from the thermal energy is dissipated efficiently into the atmosphere.

There are three types of drum brakes depending on how the brake shoes are pressed on to the drums; leading/trailing shoe type, twin leading shoe type and duo-servo type.

Structure of drum brakes

Drum brakes are a brake system with brake drums (rotor) which rotate with the wheels. Inside each drum are brake shoes fitted with brake linings (friction material). Pistons (pressure mechanism) press against the drums from the inside to generate braking force, thus making is possible to decelerate and stop the vehicle.

2), Commercial Vehicle---Disc Brake Pads

Disc Brake Pads

Brake rotors of disc brakes rotate with the wheels, and brake pads, which are fitted to the brake calipers, clamp on these rotors to stop or decelerate the wheels. The brake pads pushing against the rotors generate friction, which transforms kinetic energy into a thermal energy.

This thermal energy generates heat, but since the main components are exposed to the atmosphere, this heat can be diffused efficiently. This heat-dissipating property reduces brake fade, which is the phenomenon where braking performance is influenced by the heat. Another advantage of disc brakes is its resistance to water fade, which occurs when the water on the brakes significantly reduces braking force. When the vehicle is in motion, the rotor spins at high speeds and this rotational motion discharges the water from the rotors themselves, resulting in stable braking force.

Disc brakes are generally used in passenger cars, but due to their stable performance at higher speeds and resistance to brake fade, they are gradually spreading into the commercial vehicle segment, where drum brakes were traditionally chosen for their longer service life. There is increasing demand from customers for longer service life and higher quality, and Baiyun is committed to meeting them through further development of the disc brake’s reliability. There are two types of disc brakes.

The "opposed piston type disc brake" has pistons on both sides of the disc rotor, while the "floating type disc brake" has a piston on only one side. Floating caliper type disc brakes are also called sliding pin type disc brakes.

Disc brake construction

The brake rotor (disc) which rotates with the wheel, is clamped by brake pads (friction material) fitted to the caliper from both sides with pressure from the piston(s) (pressure mechanism) and decelerates the disc rotation, thereby slowing down and stopping the vehicle.

Advantage of BAIYUN Commercial Vehicles Brakes

3, Brake Performance
1). Braking performance: friction coefficient (FF level: 0.35-0.45) braking force: braking force, braking sensitivity
2), wear resistance: wear rate (60,000-100,000km) wear resistance.(with driving habits, road conditions, climate, brake disc material (different models, brake disc material is different, the weight of the car is different)).
3). Comfort: whether there is noise, whether there is a sense of braking, whether it is smooth.
4). Thermal recession: whether it is heat resistant -- the degree of thermal recession.
5). Shear strength: whether it falls off, whether it is easy to break, the density, whether the density is balanced, whether there are bubbles and gaps.
Other items: whether damage brake disc, whether waterproof - water recession degree, whether environmental protection, and brake disc fitting degree.

4, Factors affecting product quality/performance:
1). Formula and materials:
a. What kind of materials are included in the recipe?Is the ratio of various materials in the formula scientific and reasonable?There are dozens of commonly used materials such as: Arron, copper fiber, ceramic fiber, carbon fiber, synthetic graphite, six titanium potassium acid whisker, powder nitrile, antimony sulfide, etc

b. Purity and quality of materials purchased by the company

1, Friction Raw Material

2,Types of friction materials

*1 Sintered alloy: The phenomena where the particles of powder material join together and turns into a solid substance by pressurizing and fabricating the powder material and heating it at temperatures below the melting point. Material that is not made by melting metal, but instead by sintering metal powders is called sintered alloy.
*2 C/C composite: Carbon fiber reinforced carbon composite. Carbon composite material has been strengthened with carbon fiber. It is extremely thermally stable and lightweight. This material is often used for brake rotors and brake pads for aircraft and racing cars.

3, Friction Material of Baiyun


4, Manufacturing process of friction materials

2). Components:
The quality of the components used, such as the disc brake sheet's steel back and muffler, also affects the performance and quality of the entire brake pad.

3). Processing technology:
a. Control management and protection of materials and components.
b. Pressing effect of pressing process, pressing pressure, whether it is equal ratio pressing, pressing temperature and duration, etc.
c. Whether the heat treatment temperature and time are appropriate, and whether the grinding process is fine and standardized.
d. Procedures such as sandblasting and polishing, adhesive coating, marking and packaging, and control of semi-finished products and finished products

About BAIYUN

Zhengzhou Baiyun Industrial Co., Ltd., since 1977, is a national high-tech enterprise with main products of brake friction material and brake products. For more than 40 years, Baiyun focus on the R&D, production and selling of brake linings & pads for commercial vehicles and passenger cars, fighting for human traffic braking safety. Till now, Baiyun has become an important supporting supplier and partner of many famous domestic and overseas auto brands. Baiyun has also reached long term strategic cooperation with many famous domestic and overseas auto parts distributors.

Zhengzhou Baiyun Industrial Co., Ltd., is one of the leading auto friction braking enterprise in China, Top 10 enterprises of China Friction Material Industry and member of friction industry association. Baiyun has passed ISO9001 Quality Management System and IATF16949 Auto Industry Quality System Certification. Long-term cooperation is established with international authoritative test organizations such as America LINK and GREEN to test Baiyun brakes regularly. There are more than 1000 models brakes of Baiyun have obtained E-mark certification till now.

Baiyun will insist on the enterprise mission “create value for customers, create happiness for employees” continuously forge ahead, and create a more brilliant future