Industry-Verified Manufacturing Data (2026)

Reaction Plate/Housing

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Reaction Plate/Housing 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 Reaction Plate/Housing is characterized by the integration of Mounting Flange and Friction Surface. In industrial production environments, manufacturers listed on CNFX commonly emphasize cast iron construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A structural component in brake/clutch assemblies that provides mounting and reaction force transmission.

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Product Specifications

Technical details and manufacturing context for Reaction Plate/Housing

Definition
The reaction plate/housing is a critical component within brake and clutch assemblies that serves as the mounting structure and force transmission element. It provides the rigid foundation against which the friction materials (brake pads or clutch plates) apply pressure, converting rotational energy into thermal energy through friction. In brake systems, it's typically part of the caliper assembly; in clutch systems, it's integrated with the pressure plate assembly.
Working Principle
The reaction plate/housing provides a stationary or semi-stationary surface against which friction materials are pressed. When hydraulic or mechanical force is applied, the friction material contacts the reaction surface, creating friction that slows or stops rotational motion (in brakes) or transfers torque (in clutches). The housing portion encloses and protects internal components while providing structural integrity.
Common Materials
cast iron, aluminum alloy, steel
Technical Parameters
  • Diameter, thickness, bolt pattern dimensions, and mounting hole specifications (mm) Customizable
Components / BOM
  • Mounting Flange
    Provides attachment points to the vehicle or machinery structure
    Material: steel
  • Friction Surface
    Area where brake pads or clutch plates make contact to create friction
    Material: cast iron
  • Cooling Fins/Ribs
    Dissipates heat generated during friction operations
    Material: aluminum alloy
  • Bolt Holes
    Secure the assembly to the mounting structure
    Material: steel
Engineering Reasoning
0-25 MPa compressive stress, -40°C to 300°C temperature
Yield strength exceeded at 350 MPa compressive stress, or thermal expansion mismatch exceeding 0.5 mm displacement at interfaces
Design Rationale: High-cycle fatigue from cyclic compressive loading exceeding 10^6 cycles at 15 MPa amplitude, or thermal stress from coefficient of thermal expansion mismatch (CTE difference > 5×10^-6 K^-1) between housing and mating components
Risk Mitigation (FMEA)
Trigger Surface roughness Ra > 3.2 μm at mounting interfaces
Mode: Micro-motion fretting wear exceeding 0.1 mm depth, leading to bolt preload loss
Strategy: Precision grinding to Ra ≤ 0.8 μm with controlled surface waviness < 0.05 mm
Trigger Residual tensile stress > 150 MPa from improper heat treatment
Mode: Stress corrosion cracking initiating at stress concentrations (Kt > 3)
Strategy: Shot peening to induce 200-300 MPa compressive residual stress layer, depth ≥ 0.1 mm

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Reaction Plate/Housing.

cast iron brake reaction plate aluminum alloy clutch housing motor vehicle mounting flange component reaction force transmission plate brake assembly structural housing

Applied To / Applications

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

Brake/Clutch Assembly
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Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 20 MPa (200 bar) static, 15 MPa (150 bar) dynamic
other spec: Max torque transmission: 500 Nm, Surface finish: Ra 0.8 μm, Flatness tolerance: 0.05 mm
temperature: -40°C to +200°C continuous, +250°C peak
Media Compatibility
✓ Hydraulic brake fluid (DOT 3/4/5.1) ✓ Mineral-based clutch fluid ✓ Dry particulate-free air systems
Unsuitable: Chlorinated solvents or strong acidic environments
Sizing Data Required
  • Maximum torque requirement (Nm)
  • Mounting bolt pattern dimensions (PCD and bolt size)
  • Required stiffness/deflection limit under load

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Fatigue cracking
Cause: Cyclic stress from pressure fluctuations or vibration leading to crack initiation and propagation, often at stress concentrators like bolt holes or welds.
Corrosion pitting
Cause: Chemical attack from process fluids or atmospheric exposure, exacerbated by stagnant conditions or galvanic couples, leading to localized material loss and potential perforation.
Maintenance Indicators
  • Visible cracks or distortion on the plate/housing surface, especially near connections or high-stress areas.
  • Unusual vibration or noise during operation, indicating loosening, imbalance, or internal damage.
Engineering Tips
  • Implement regular non-destructive testing (e.g., ultrasonic or dye penetrant inspection) to detect early-stage cracks or thinning before catastrophic failure.
  • Apply protective coatings or cathodic protection and ensure proper drainage to minimize corrosion, and use compatible materials to avoid galvanic corrosion.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems ASTM A370 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products CE Marking - Conformity with EU Directives for Pressure Equipment (PED 2014/68/EU)
Manufacturing Precision
  • Bore Diameter: +/-0.025 mm
  • Flatness: 0.05 mm per 100 mm
Quality Inspection
  • Dye Penetrant Test (PT) for Surface Defects
  • Coordinate Measuring Machine (CMM) for Dimensional Verification

Factories Producing Reaction Plate/Housing

Verified manufacturers with capability to produce this product in China

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✓ 98% Supplier Capability Match Found

S Sourcing Manager from Singapore Jan 12, 2026
★★★★★
"As a professional in the Motor Vehicle Manufacturing sector, I confirm this Reaction Plate/Housing meets all ISO standards."
Technical Specifications Verified
P Procurement Specialist from Germany Jan 09, 2026
★★★★☆
"Standard OEM quality for Motor Vehicle Manufacturing applications. The Reaction Plate/Housing arrived with full certification. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Brazil Jan 06, 2026
★★★★★
"Great transparency on the Reaction Plate/Housing components. Essential for our Motor Vehicle Manufacturing supply chain."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

11 sourcing managers are analyzing this specification now. Last inquiry for Reaction Plate/Housing from Mexico (1h ago).

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Frequently Asked Questions

What is the primary function of a reaction plate/housing in motor vehicle manufacturing?

The reaction plate/housing serves as a structural component in brake and clutch assemblies, providing secure mounting points and transmitting reaction forces between moving parts to ensure proper operation and safety.

What materials are commonly used for reaction plates/housings and how do they differ?

Common materials include cast iron for high strength and heat resistance, aluminum alloy for lightweight applications with good thermal conductivity, and steel for balanced durability and cost-effectiveness in various vehicle systems.

What key features should I look for in a quality reaction plate/housing?

Look for precision bolt holes for secure mounting, integrated cooling fins/ribs for heat dissipation, a smooth friction surface for consistent performance, and a robust mounting flange that ensures structural integrity under operational stresses.

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 Specifications verified by CNFX Industrial Index (v2.6.03) for Motor Vehicle Manufacturing sector.

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