Brake Pads: Industry Knowledge & Professional Overview
Brake pads are one of the most critical safety components in the automotive braking system. They work by creating friction against the brake rotors to slow down or stop a vehicle. As core consumable parts, their performance, material, structure and service life directly affect driving safety. This article explains the professional knowledge of brake pads for the automotive industry.
1. Working Principle
When the driver steps on the brake pedal, hydraulic pressure pushes the brake caliper, which then clamps the brake pads against both sides of the rotating brake disc. The friction between the pads and the disc converts kinetic energy into heat energy, reducing wheel speed and stopping the vehicle. The entire process requires stable friction, high heat resistance and low noise.
2. Main Material Categories
The friction material determines the performance and application of brake pads. The mainstream types in the industry include:
Semi-metallic Brake Pads
Made of steel fiber, iron powder and resin, they feature high strength, good heat dissipation and low cost. They are widely used in ordinary passenger cars and commercial vehicles, but produce more noise and dust.
Low-metallic Brake Pads
Contain a small amount of metal fiber, with better comfort and quieter performance than semi-metallic pads. Suitable for urban family cars.
Ceramic Brake Pads
Composed of ceramic fiber, filler and binder without harmful heavy metals. They feature low noise, low dust, high temperature resistance and long service life. They are the mainstream high-end configuration for new energy vehicles and luxury cars.
Carbon Ceramic Brake Pads
Used in high-performance and luxury vehicles, with ultra-high heat resistance, lightweight and long service life, but at a higher cost.
3. Key Performance Indicators
Professional brake pads must meet strict industry standards, including:
• Stable friction coefficient under high and low temperatures
• Excellent heat fade resistance
• Low wear rate for long service life
• Low noise and low vibration
• No damage to the brake disc
• Compliance with environmental and safety regulations
4. Differences Between Original & Aftermarket Brake Pads
Original equipment (OE) brake pads are matched with vehicle performance at the factory, focusing on safety and comfort. Aftermarket pads are divided into high-quality replacement, economical and upgraded versions, meeting different market demands such as durability, silence and high performance.
5. Application in New Energy Vehicles
New energy vehicles have higher requirements for brake pads due to regenerative braking systems. NEV-specific brake pads emphasize:
• Low drag and low wear
• Ultra-quiet performance
• High thermal stability
• Lightweight design
• Environmental protection and copper-free formula
6. Replacement Standards & Safety Tips
Brake pads are consumables and need regular inspection. Generally, they should be replaced when the friction layer thickness is less than 3mm. Driving with worn brake pads will lead to longer braking distance, noise, vibration and even brake failure.
7. Industry Development Trends
The global brake pad industry is moving toward:
• Copper-free and environmentally friendly materials
• High performance and long service life
• Intelligence and sensor integration
• Adaptation to brake-by-wire systems
• Lightweight and low-emission products
Summary
As a core safety component, brake pads involve material science, manufacturing technology and automotive system matching. With the development of intelligent and electric vehicles, the industry continues to upgrade in safety, environmental protection and performance, becoming an important part of the automotive supply chain.
