Editorial Technical Reference

Brake Pad

This page explains how Brake Pad is classified within Motor Vehicle Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A friction component that converts kinetic energy to heat to slow or stop a vehicle when pressed against a brake disc.

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Product Specifications

Technical details and manufacturing context for Brake Pad

Definition

Brake pads are used in disc brake systems of passenger cars, commercial vehicles, and motorcycles. They are specified by dimensions, friction material formulation, and performance characteristics. Grades differ by friction coefficient, temperature stability, wear rate, and noise level, with premium pads offering higher performance and durability.

Working Principle

When the brake pedal is pressed, hydraulic pressure forces the brake pad against the rotating disc. The resulting friction converts the vehicle's kinetic energy into thermal energy, slowing the wheel. The friction material's composition determines the coefficient of friction and wear characteristics, which must remain stable across a wide temperature range.

Common Materials

NAO (Non-Asbestos Organic) compounds, Low-metallic compounds, Semi-metallic compounds, Ceramic compounds, Steel backing plate (e.g., SPCC, DC01)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Friction Coefficient (μ)	0.35–0.45 -	Typical range for passenger car pads; must be stable across temperature.SAE J866
Operating Temperature Range	-40 to 400 °C	Continuous operation; peak may be higher.
Wear Rate	0.1–0.5 mm/1000 km	Depends on material and driving conditions.GB 5763
Shear Strength (backing plate to friction material)	≥ 3.0 MPa	Minimum bond strength.ISO 15484
Compressibility	50–150 μm/kN	Measured at 16 MPa; affects pedal feel.ISO 15484
Thickness	10–20 mm	Typical total pad thickness; varies by vehicle.
Length	80–200 mm	Depends on caliper size.
Width	40–100 mm	Depends on caliper size.
Surface Roughness (friction surface)	1.6–3.2 μm Ra	As-machined; affects bedding.
Density	2.0–3.0 g/cm³	Typical for friction material.
Hardness (friction material)	60–90 Shore D	Indicates resistance to indentation.
Noise Level	< 70 dB(A)	Measured under specific conditions; lower is better.
Thermal Conductivity	0.5–2.0 W/m·K	Affects heat transfer to caliper.
Coefficient of Variation (μ)	≤ 10 %	Stability of friction coefficient across tests.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Brake Pad.

Published Manufacturer Relationships

Source-reviewed profile relationships currently associated with Brake Pad

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Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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