Drum brakes and disc brakes are two common braking methods in automotive braking systems, and they have significant differences in multiple aspects. Here are the main differences between them:

1、 The Appearance and Structure of Drum Brakes and Disc Brakes 

Drum brake: Its appearance is similar to a bell drum, mainly composed of a brake drum, brake shoes, brake wheel cylinders, etc. The brake shoes are pushed by hydraulic or pneumatic pressure during braking, closely adhering to the inner wall of the brake drum and generating braking force through friction. The brake shoes of drum brakes are usually located inside the brake drum ,  so only a circular drum shaped object can be seen from the outside.

Disc brake: Its appearance is disc-shaped, mainly composed of brake discs, brake calipers, brake pads, etc. The brake disc is fixed on the wheel and rotates together with the wheel. When braking, the piston inside the brake caliper pushes the brake pads to press the brake disc, causing the wheels to slow down or stop through friction. The brake pads and discs of the disc brake are exposed to the outside for easy heat dissipation and maintenance.

2、 The Working Principle of Drum Brakes and Disc Brakes  

Drum brake: The braking force is generated by the friction of the brake shoe on the inner wall of the brake drum. When the driver steps on the brake pedal, the brake transmission mechanism pushes the brake shoes outward to closely contact the inner wall of the brake drum, thereby achieving braking.

Disc brake: generates braking force through friction between brake pads and brake discs. When the driver steps on the brake pedal, the hydraulic system pushes the piston inside the brake caliper, causing the brake pads to press against the brake disc, thereby generating frictional torque to slow down or stop the wheels.

3、 Performance Characteristics of Drum Brakes and Disc Brakes 

Braking force: Drum brakes, due to their structural characteristics, are usually able to generate significant braking force, especially under heavy or high load conditions. However, this may also cause the vehicle to nod or shake during braking. Although the braking force of disc brakes is relatively small, their braking process is smoother and can provide a better driving experience.

Heat dissipation performance: Due to its open design, disc brakes have significantly better heat dissipation performance than drum brakes. After prolonged continuous braking or high-speed driving, disc brakes can quickly dissipate heat, maintaining the stability and reliability of the braking system. Drum brakes, on the other hand, have poor heat dissipation performance due to the concentration of heat inside the brake drum. Prolonged continuous braking may cause the brake drum to overheat, affecting braking effectiveness and safety.

Drainage performance: The open design of disc brakes also facilitates drainage. When water enters the braking system, it can be quickly drained to avoid affecting the braking effect. The closed design of drum brakes  may lead to water accumulation inside the brake drum, affecting braking performance and safety.

Reaction speed: The reaction speed of disc brakes is usually faster than drum brakes because the contact area between the brake elements (brake pads and brake discs) of disc brakes is larger, the friction is stronger, and they can respond to the driver's braking instructions faster.

4、 Application Scope of Drum Brakes and Disc Brakes 

Drum brakes: Due to their low cost and high braking force, they are widely used in some economical cars, trucks, and rear wheel braking systems. Especially in situations where large braking loads are required, such as heavy-duty trucks or tractors, drum brakes are still an indispensable choice.

Disc brakes: Due to their good heat dissipation performance, fast response speed, and easy maintenance, they have been increasingly widely used in modern automobiles. Especially in mid to high end sedans, sports cars, and front wheel braking systems, disc brakes have become the mainstream choice.

As a brake drum manufacturer and factory , an annual output value exceeding 60 million yuan .We have high quality brake drum for sale .About the brake drum, we have various type of it . Such as trailer drum brakes, rear drum brakes , semi brake drums , electric drum brakes , industrial drum brakes and gunite brake drums. The size of the brake drum also various .Such as 15x4 brake drum , 12x2 trailer brake drum and 16.5 x5 brake drum .The drum brakes price in our company are reasonable . If you are interesting in our product welcome to contact us!

Drum brakes and disc brakes are two common braking methods in automotive braking systems, and they have significant differences in multiple aspects. Here are the main differences between them:

1、 The Appearance and Structure of Drum Brakes and Disc Brakes 

Drum brake: Its appearance is similar to a bell drum, mainly composed of a brake drum, brake shoes, brake wheel cylinders, etc. The brake shoes are pushed by hydraulic or pneumatic pressure during braking, closely adhering to the inner wall of the brake drum and generating braking force through friction. The brake shoes of drum brakes are usually located inside the brake drum ,  so only a circular drum shaped object can be seen from the outside.

Disc brake: Its appearance is disc-shaped, mainly composed of brake discs, brake calipers, brake pads, etc. The brake disc is fixed on the wheel and rotates together with the wheel. When braking, the piston inside the brake caliper pushes the brake pads to press the brake disc, causing the wheels to slow down or stop through friction. The brake pads and discs of the disc brake are exposed to the outside for easy heat dissipation and maintenance.

2、 The Working Principle of Drum Brakes and Disc Brakes 

Drum brake: The braking force is generated by the friction of the brake shoe on the inner wall of the brake drum. When the driver steps on the brake pedal, the brake transmission mechanism pushes the brake shoes outward to closely contact the inner wall of the brake drum, thereby achieving braking.

Disc brake: generates braking force through friction between brake pads and brake discs. When the driver steps on the brake pedal, the hydraulic system pushes the piston inside the brake caliper, causing the brake pads to press against the brake disc, thereby generating frictional torque to slow down or stop the wheels.

3、 Performance Characteristics of Drum Brakes and Disc Brakes 

Braking force: Drum brakes, due to their structural characteristics, are usually able to generate significant braking force, especially under heavy or high load conditions. However, this may also cause the vehicle to nod or shake during braking. Although the braking force of disc brakes is relatively small, their braking process is smoother and can provide a better driving experience.

Heat dissipation performance: Due to its open design, disc brakes have significantly better heat dissipation performance than drum brakes. After prolonged continuous braking or high-speed driving, disc brakes can quickly dissipate heat, maintaining the stability and reliability of the braking system. Drum brakes, on the other hand, have poor heat dissipation performance due to the concentration of heat inside the brake drum. Prolonged continuous braking may cause the brake drum to overheat, affecting braking effectiveness and safety.

Drainage performance: The open design of disc brakes also facilitates drainage. When water enters the braking system, it can be quickly drained to avoid affecting the braking effect. The closed design of drum brakes may lead to water accumulation inside the brake drum, affecting braking performance and safety.

Reaction speed: The reaction speed of disc brakes is usually faster than drum brakes because the contact area between the brake elements (brake pads and brake discs) of disc brakes is larger, the friction is stronger, and they can respond to the driver's braking instructions faster.

4、 Application Scope of Drum Brakes and Disc Brakes  

Drum brakes: Due to their low cost and high braking force, they are widely used in some economical cars, trucks, and rear wheel braking systems. Especially in situations where large braking loads are required, such as heavy-duty trucks or tractors, drum brakes are still an indispensable choice.

Disc brakes: Due to their good heat dissipation performance, fast response speed, and easy maintenance, they have been increasingly widely used in modern automobiles. Especially in mid to high end sedans, sports cars, and front wheel braking systems, disc brakes have become the mainstream choice.

As a brake drum manufacturer and factory , an annual output value exceeding 60 million yuan .We have high quality brake drum for sale .About the brake drum, we have various type of it . Such as trailer drum brakes, rear drum brakes , semi brake drums , electric drum brakes , industrial drum brakes and gunite brake drums. The size of the brake drum also various .Such as 15x4 brake drum , 12x2 trailer brake drum and 16.5 x5 brake drum .The drum brakes price in our company are reasonable . If you are interesting in our product welcome to contact us!