INDUSTRY COMPONENT

Brake Pad

A friction material component in brake calipers that creates stopping force through contact with rotors.

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Component Specifications

Definition
A brake pad is a consumable friction component mounted within a brake caliper assembly that presses against a rotating brake rotor to generate deceleration through kinetic energy conversion to heat via friction. It consists of a steel backing plate bonded to a friction material compound, designed to withstand extreme thermal and mechanical stresses while maintaining consistent performance across operating temperatures.
Working Principle
When hydraulic pressure activates the brake caliper, pistons force the brake pads against both sides of the rotating brake rotor. The resulting friction converts the vehicle's kinetic energy into thermal energy, creating deceleration. The friction material's composition ensures stable coefficient of friction while managing heat dissipation and wear characteristics.
Materials
Steel backing plate with bonded friction material typically composed of: organic compounds (resins, rubber, glass), semi-metallic blends (steel, copper, iron fibers), ceramic formulations (ceramic fibers, non-ferrous fillers), or low-metallic NAO (Non-Asbestos Organic) compounds. Specific formulations vary by application (passenger, commercial, performance).
Technical Parameters
  • Thickness 8-15 mm (new)
  • Wear Limit 2-3 mm remaining
  • Shear Strength >15 MPa
  • Compressibility <5%
  • Friction Coefficient 0.35-0.45 (μ)
  • Operating Temperature -40°C to 600°C
Standards
ISO 15484, DIN 74100, SAE J866, ECE R90

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Brake Pad.

automotive brake pads friction material brake components braking system rotor contact wear indicators ceramic vs semi-metallic ECE R90 certification Brake Pad Brake Pad in Motor Vehicle Manufacturing

Parent Products

This component is used in the following industrial products

Brake Caliper

A hydraulic or mechanical device that applies clamping force to brake pads against a rotor to slow or stop a vehicle.

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Engineering Analysis

Risks & Mitigation
  • Pad delamination from backing plate
  • Fade from overheating
  • Uneven wear due to caliper issues
  • Noise (squeal, groan)
  • Reduced effectiveness when wet or contaminated
  • Premature wear from abrasive debris
FMEA Triads
Trigger: Overheating from aggressive braking
Failure: Friction material glazing reduces coefficient of friction
Mitigation: Use pads with higher temperature ratings; ensure proper cooling; avoid prolonged braking
Trigger: Contamination by brake fluid or lubricants
Failure: Reduced friction leading to longer stopping distances
Mitigation: Proper sealing during maintenance; careful handling; use designated brake cleaners
Trigger: Uneven caliper pressure distribution
Failure: Tapered or uneven pad wear
Mitigation: Regular caliper maintenance; ensure sliding pins move freely; replace worn hardware

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Thickness variation ≤0.2 mm; parallelism ≤0.05 mm; backing plate flatness ≤0.1 mm
Test Method
ISO 15484 for friction performance, wear, and shear testing; ECE R90 for type approval; SAE J2522 for dynamometer testing

Buyer Feedback

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Frequently Asked Questions

How often should brake pads be replaced?

Replacement intervals vary by driving conditions (typically 40,000-70,000 km). Monitor wear indicators or measure remaining thickness (replace at 2-3 mm). Aggressive driving, towing, or urban stop-and-go traffic accelerate wear.

What's the difference between ceramic and semi-metallic brake pads?

Ceramic pads offer quieter operation, less dust, and consistent performance but are costlier. Semi-metallic pads provide better heat dissipation and cold bite but may generate more noise and dust. Ceramic is common for passenger vehicles; semi-metallic suits heavier-duty applications.

Do brake pads need bedding-in?

Yes. Proper bedding (break-in) transfers friction material to rotors, establishing optimal contact. Follow manufacturer's procedure (typically 5-10 moderate stops from 50-60 km/h with cooling intervals) to prevent glazing and ensure full performance.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Brake Lever/Pedal Brake Pad/Shoe