Caliper Body/Housing: Weight Range 1.5-4.5 kg

Component Specifications

Definition

The caliper body/housing is the primary structural component in a disc brake system that mounts over the brake rotor. It serves as a rigid frame containing hydraulic pistons, brake pads, and fluid passages. During braking, hydraulic pressure forces pistons against the inner brake pad, while the caliper body slides or flexes to apply equal force to the outer pad, creating clamping force on the rotor.

Working Principle

Converts hydraulic pressure from the master cylinder into mechanical clamping force through piston movement. The caliper body acts as a reaction frame: hydraulic pressure pushes pistons against the inner brake pad, while the caliper body either slides on guide pins (floating caliper) or flexes (fixed caliper) to apply equal force to the outer pad, sandwiching the rotor between pads.

Materials

Typically gray cast iron (GCI) or aluminum alloy (A356-T6). High-performance applications may use forged aluminum or ductile iron. Materials must withstand thermal cycling (up to 300°C), corrosion, and mechanical stresses.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Weight Range	1.5-4.5 kg
Bore Diameter	30-60 mm
Mounting Type	Floating/Sliding or Fixed
Pressure Rating	Up to 200 bar
Piston Configuration	Single, Dual, or Multi-piston
Operating Temperature	-40°C to 300°C

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

Standards

ISO 15484, DIN 74256, SAE J431

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

Thermal cracking from repeated heating/cooling cycles
Corrosion in salt-exposed environments
Piston seizure due to contamination
Mounting bolt fatigue failure

FMEA Triads

Trigger: Inadequate material heat treatment
Failure: Thermal stress cracking in caliper body
Mitigation: Implement strict thermal cycling tests and use materials with proper heat treatment specifications

Trigger: Corrosion from road salt exposure
Failure: Reduced structural integrity and piston binding
Mitigation: Apply corrosion-resistant coatings and specify appropriate aluminum alloys or treated cast iron

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1 mm for critical bore dimensions, ±0.05 mm for mounting surfaces

Test Method

Pressure testing to 1.5x operating pressure, thermal cycling tests, salt spray corrosion testing per ASTM B117

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Caliper Body/Housing

Manufacturer profiles associated with Caliper Body/Housing.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Brake Disc (Rotor)

A rotating disc in disc brake systems that creates friction with brake pads to slow or stop vehicle motion.

Main Bearing Journals

Main bearing journals are precision-machined cylindrical surfaces on a crankshaft that rotate within main bearings to support rotational motion in internal combustion engines.

Surround

Structural component that encloses and protects suspension system elements while providing mounting points and structural integrity.

Brake Disc/Rotor

A rotating disc component in disc brake systems that converts kinetic energy into thermal energy through friction to slow or stop vehicle motion.

Frequently Asked Questions

What is the difference between floating and fixed caliper bodies?

Floating caliper bodies slide on guide pins to apply pressure, while fixed caliper bodies are rigidly mounted and use pistons on both sides of the rotor for more even pressure distribution and better performance.

Why are caliper bodies typically made from cast iron or aluminum?

Cast iron provides excellent durability and heat dissipation, while aluminum reduces weight and improves corrosion resistance, making it common in modern vehicles for better fuel efficiency.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Caliper Body/Housing