A Complete Guide to Brake Pad Selection and Maintenance: Understand Key Indicators, Choose the Right Safety Guarantee
As the core executive component of a vehicle's braking system, brake pads directly affect driving safety and experience. However, the market is flooded with various product types, and many car owners often fall into misunderstandings when selecting and maintaining brake pads. Combining industry standards and the professional experience of Shandong Huaruifeng Machinery, this article breaks down core knowledge about brake pads to help you accurately control braking safety.
I. Core Performance Indicators of Brake Pads: The "Quantified Standards" for Safety
Performance indicators are the core basis for judging the quality of brake pads, among which three key parameters determine braking effect and stability:
• Friction Coefficient: A core indicator directly affecting braking force. Excessively high values may cause wheel lock-up, while excessively low values prolong braking distance. The suitable range for family cars is 0.35-0.45, and new energy vehicles (NEVs) and commercial vehicles, due to higher load, require products with a high-stability coefficient of 0.45-0.55. Huaruifeng ceramic brake pads can stably control the friction coefficient within this range through formula optimization, adapting to multiple scenarios.
• Resistance to Thermal Fading: When continuous braking causes the temperature to exceed 400℃, the friction coefficient of brake pads will drop by more than 30%, leading to reduced braking efficiency. This is a major safety hazard in scenarios such as mountainous areas and highways. High-quality products like Huaruifeng's high-temperature resistant brake pads (capable of withstanding 800℃) can control the thermal fading rate within 15%.
• Wear Life: Affected by material and usage scenarios, ordinary brake pads have a service life of approximately 30,000-50,000 kilometers. Huaruifeng's ceramic brake pads dedicated to commercial vehicles, through material upgrading, have a service life of up to 100,000 kilometers, reducing the replacement frequency by 50%.
II. Comparison of Mainstream Brake Pad Materials: Choose the Right One for Your Scenario
Brake pads of different materials have significant performance differences, and selection should be based on vehicle type and usage needs:
• Semi-Metallic Brake Pads: Made of a mixture of metal fibers and organic materials, they have good wear resistance and heat dissipation. However, they produce high braking noise, generate much dust, and cause severe wear to brake discs, making them suitable for daily urban commuting with family cars priced around 100,000 yuan.
• Ceramic Brake Pads: With ceramic fibers as the core material, they have the advantages of high-temperature resistance, low noise, and low dust. They can maintain a stable friction coefficient even in high-temperature environments, making them suitable for NEVs, mid-to-high-end cars, and vehicles frequently driving on mountain roads. Huaruifeng's low-copper ceramic brake pads have a copper content of less than 5%, balancing environmental protection and performance, and have passed multiple industry certifications.
• Carbon-Ceramic Brake Pads: Representing high-end materials, they are lightweight, high-temperature resistant (thermal fading starts at 650℃), and have a long service life. However, they are expensive and mainly used in high-performance sports cars and high-end commercial vehicles.
III. Brake Pad Replacement and Maintenance: Avoid Safety Risks
Timely replacement and standardized maintenance are key to ensuring braking safety. The following key points should be mastered:
Judgment of Replacement Timing
1. Thickness Inspection: The thickness of new brake pads is approximately 10-15 millimeters. When worn down to 3-4 millimeters, they must be replaced immediately. This can be observed directly through the gap in the wheel hub or measured with a caliper.
2. Performance Perception: If the brake pedal travel becomes longer, braking effect weakens, or a sharp metal friction sound is heard during braking, it indicates that the brake pads have worn to the limit.
3. Mileage Reference: Ordinary family cars should have their brake pads inspected every 30,000-50,000 kilometers, and commercial vehicles every 20,000-30,000 kilometers. The specific interval should be adjusted according to driving habits (frequent braking shortens service life).
Daily Maintenance Key Points
• Avoid continuous braking on long downhill sections. Instead, use engine braking to assist in deceleration, reducing the risk of thermal fading. Maintain an interval of more than 15 seconds between brakings to facilitate heat dissipation.
• Regularly check the water content of brake fluid. If it exceeds 3%, replace the fluid in a timely manner to avoid affecting the heat transfer efficiency of the braking system.
• After replacing brake pads, a "running-in" process is required. Avoid sudden braking within the initial 200 kilometers, and resume normal driving only after the friction surfaces are fully fitted.
The selection and maintenance of brake pads are an important line of defense for vehicle safety. As a professional brake pad manufacturer, Shandong Huaruifeng Machinery always takes "performance adaptation and safety reliability" as the core, launching customized products for different vehicle models, and implementing strict standards throughout the entire process from material research and development to production control. It is recommended that car owners, based on their own needs, prioritize regular products that meet TS16949 and ISO9001 certifications to build a solid guarantee for driving safety.
