Structured Manufacturing Data (2026)

Brake Caliper

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Brake Caliper used in the Motor Vehicle Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Brake Caliper is characterized by the integration of Caliper Body/Housing and Piston(s). In industrial production environments, manufacturers listed on CNFX commonly emphasize Cast Iron construction to support stable, high-cycle operation across diverse manufacturing scenarios.

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

Product Specifications

Technical details and manufacturing context for Brake Caliper

Definition
The brake caliper is a critical component of disc brake systems in motor vehicles. It houses the brake pads and pistons, and when hydraulic pressure is applied from the master cylinder, the pistons push the pads against the rotating brake rotor (disc), creating friction that converts kinetic energy into thermal energy, thereby decelerating or stopping the vehicle.
Working Principle
Hydraulic pressure from the master cylinder (or electric signal in electronic systems) is transmitted to the caliper's piston(s). This pressure forces the piston(s) outward, which in turn presses the brake pads firmly against both sides of the rotating brake rotor. The resulting friction generates the braking force.
Common Materials
Cast Iron, Aluminum Alloy
Technical Parameters
  • Piston diameter, which determines the clamping force and hydraulic pressure requirements. (mm) Standard Spec
Components / BOM
  • Caliper Body/Housing Part
    Main structural component that houses the piston(s) and attaches to the vehicle's suspension.
    Material: Cast Iron or Aluminum Alloy
  • Piston(s) Part
    Cylindrical component(s) that move outward under hydraulic pressure to apply force to the brake pads.
    Material: Steel or Aluminum Alloy
  • Brake Pad Part
    Friction material that contacts the rotor to create braking force.
    Material: Composite Friction Material
  • Seals (Dust Boot & Piston Seal) Part
    Prevent contamination of the piston bore and retain hydraulic fluid.
    Material: Rubber
  • Bleeder Screw Part
    Valve for removing air from the hydraulic system (bleeding the brakes).
    Material: Steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Brake Caliper.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 20 MPa (hydraulic systems)
other spec: Rotor diameter range: 200-400 mm, Pad area: 30-80 cm²
temperature: -40°C to 200°C (operating), up to 300°C (peak)
Media Compatibility
✓ Automotive brake fluid (DOT 3/4/5.1) ✓ Hydraulic mineral oil ✓ Dry mechanical systems (no fluid)
Unsuitable: High-concentration abrasive slurry environments
Sizing Data Required
  • Vehicle weight and braking force requirements
  • Rotor diameter and thickness
  • Required clamping force and piston area

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Piston Seizure
Cause: Corrosion buildup or contamination preventing piston movement, often due to moisture ingress, lack of lubrication, or debris accumulation.
Brake Fluid Leakage
Cause: Seal degradation from heat cycling, chemical incompatibility with brake fluid, or physical damage to piston seals or bleeder valves.
Maintenance Indicators
  • Uneven brake pad wear or excessive dust on one side indicating caliper sticking
  • Brake fluid visible on caliper body or dripping, suggesting seal failure
Engineering Tips
  • Implement regular brake fluid flushing per OEM intervals to prevent moisture absorption and corrosion
  • Apply high-temperature silicone grease to caliper slide pins and contact points during pad replacement to ensure proper movement

Compliance & Manufacturing Standards

Reference Standards
ISO 26262-5:2018 (Functional safety for road vehicles) SAE J431 (Automotive gray iron castings) ECE R90 (Brake lining assemblies and drum brake linings for motor vehicles)
Manufacturing Precision
  • Caliper bore diameter: +/-0.02mm
  • Mounting surface flatness: 0.05mm
Quality Inspection
  • Pressure testing (leak and burst)
  • Dimensional verification with CMM

Factories Producing Brake Caliper

Manufacturer profiles with relevant production capability in China

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What are the main differences between cast iron and aluminum alloy brake calipers?

Cast iron calipers offer superior durability and heat dissipation for heavy-duty applications, while aluminum alloy calipers are lighter, reducing unsprung weight for better vehicle handling and fuel efficiency, though they may be more prone to corrosion in certain environments.

How often should brake calipers be inspected or replaced in commercial vehicles?

Brake calipers should be inspected during every brake service (typically every 25,000-50,000 miles) and replaced if showing signs of piston sticking, seal leakage, or corrosion. In severe service conditions, more frequent inspections are recommended to ensure safety and compliance.

What maintenance is required for hydraulic brake calipers in fleet vehicles?

Regular maintenance includes checking for fluid leaks, ensuring pistons move freely, replacing worn seals and dust boots during pad changes, and bleeding the system to remove air. Proper lubrication of slide pins and contact points is also crucial to prevent uneven pad wear and caliper seizure.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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