Editorial Technical Reference

Center Housing

This page explains how Center Housing 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

The central structural component of a turbocharger's CHRA that houses the rotating assembly and provides mounting interfaces.

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Center Housing in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Center Housing

Definition
The Center Housing is the core structural element within the Center Housing Rotating Assembly (CHRA) of a turbocharger. It serves as the main housing that contains and supports the turbine shaft, bearings, and compressor wheel assembly. This component provides critical mounting surfaces for both the turbine and compressor housings, maintains proper alignment of rotating parts, and contains lubrication and cooling passages for the bearing system. Its design directly impacts turbocharger durability, thermal management, and overall performance.

In motor vehicle manufacturing, the Center Housing is typically made from cast iron or aluminum alloy, chosen for strength, heat resistance, and weight considerations. The housing must withstand high operating temperatures (up to 760–1050 °C) and pressures (1.0–1.6 MPa) while maintaining dimensional stability. Key parameters include bearing bore diameter (12–25 mm), turbine wheel diameter (40–90 mm), compressor wheel diameter (35–80 mm), and bearing journal diameter (8–16 mm), with tight tolerances (e.g., ±0.005 mm for journal, ±0.01 mm for bore) to ensure rotor balance and bearing fit. Material grades such as GGG40–GGG70 (ductile iron) are referenced per DIN 1693, and the housing weight typically ranges from 1.5 to 4.5 kg.

For procurement, verify that the Center Housing meets the required dimensional tolerances (ISO 286) and material specifications for the specific turbocharger model. Confirm the maximum operating temperature and pressure ratings with the manufacturer, as these affect material selection and durability. The housing's design must align with the turbine and compressor housings, and its lubrication and cooling passages must be compatible with the engine's oil system. Always consult the legal manufacturer or supplier for model-specific values and standards, as the ranges provided are general references.
Working Principle
The Center Housing functions as a stationary structural platform that supports the high-speed rotating assembly (turbine shaft, compressor wheel, and bearings) within the turbocharger. It transfers loads from rotating components to the engine mounting, maintains precise alignment through bearing journals, and facilitates heat dissipation from hot turbine gases via integrated cooling passages. Lubrication channels within the housing deliver oil to bearings under pressure while drain passages return oil to the engine sump.
Common Materials
Cast Iron, Aluminum Alloy
Technical Parameters
ParameterTypical rangeNotes & selection driver
Bearing Bore Diameter12–25 mmDetermines bearing selection and rotor stabilityISO 286
Turbine Wheel Diameter40–90 mmAffects flow capacity and efficiency
Compressor Wheel Diameter35–80 mmMatches turbine size for performance
Bearing Journal Diameter8–16 mmCritical for oil film thickness and stabilityISO 286
Bearing Journal Tolerance±0.005 mmTighter tolerance improves rotor balanceISO 286
Bearing Bore Tolerance±0.01 mmEnsures proper bearing fitISO 286
Maximum Operating Temperature760–1050 °CMaterial limits; above causes creep
Material GradeGGG40–GGG70Ductile iron for strength and heat resistanceDIN 1693
Weight1.5–4.5 kgAffects overall turbocharger weight

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

Components / BOM
  • Housing Body
    The housing itself: encloses and locates the internal parts and provides the mounting interface.
  • Bearing Journals Part
    Precision-machined surfaces that support and align the turbine shaft bearings
    Material: Cast Iron or Aluminum Alloy
  • Cooling Water Passages Part
    Integrated channels for coolant flow to manage heat from turbine section
    Material: Same as housing material
  • Mounting Flanges Part
    Machined surfaces with bolt patterns for attaching turbine and compressor housings
    Material: Same as housing material

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 5 bar (absolute)
flow rate: Dependent on turbocharger size, typically 0.05-2.0 kg/s
temperature: -40°C to 400°C
slurry concentration: Not applicable (clean gas/dry air only)
Media Compatibility
✓ Clean exhaust gases ✓ Compressed air ✓ Natural gas
Unsuitable: Abrasive particulate-laden environments
Sizing Data Required
  • Turbocharger displacement (L)
  • Target boost pressure (bar)
  • Maximum exhaust gas temperature (°C)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Fatigue cracking
Cause: Cyclic loading from misalignment, vibration, or thermal expansion stresses exceeding material endurance limits
Bearing seat wear
Cause: Contamination ingress, inadequate lubrication, or improper bearing fit leading to fretting corrosion and dimensional degradation
Maintenance Indicators
  • Unusual vibration patterns or audible knocking during operation
  • Visible oil leaks or discoloration around housing seals and joints
Engineering Tips
  • Implement precision laser alignment during installation and periodic realignment checks to minimize stress concentrations
  • Establish rigorous contamination control protocols for lubrication systems and use condition monitoring (vibration analysis, thermography) for predictive maintenance

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 286-2:2010 (Geometrical product specifications - Limits and fits) ANSI/ASME B4.1-1967 (R2019) (Preferred Limits and Fits for Cylindrical Parts)

Quoted from the published standard.

Manufacturing Precision
  • Bore diameter: +/-0.025 mm (IT6 grade)
  • Mounting surface flatness: 0.05 mm per 100 mm
Quality Inspection
  • Coordinate Measuring Machine (CMM) dimensional verification
  • Magnetic Particle Inspection (MPI) for surface crack detection
Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
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Inspection readiness
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Supplier transparency
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Manufacturers of Center Housing

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

TURBOKOO
Suzhou, Jiangsu, CN
Also makes: Turbocharger, Exhaust System, Actuator/Sensor and 1 more
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Center Housing (4)”
View source page ↗ turbokoo.com · recorded 2026-09-16
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Frequently Asked Questions

What materials are commonly used for the Center Housing?

According to the directory, the Center Housing is typically made from cast iron or aluminum alloy. Material grades such as GGG40–GGG70 (ductile iron) are referenced per DIN 1693. The choice depends on strength, heat resistance, and weight requirements.

What are the key dimensional parameters to verify?

Key parameters include bearing bore diameter (12–25 mm), turbine wheel diameter (40–90 mm), compressor wheel diameter (35–80 mm), and bearing journal diameter (8–16 mm). Tolerances are critical: bearing journal tolerance is ±0.005 mm, and bearing bore tolerance is ±0.01 mm, per ISO 286.

How does the Center Housing affect turbocharger performance?

The housing maintains alignment of rotating parts, supports the shaft and bearings, and contains cooling and lubrication passages. Its design impacts durability, thermal management, and overall performance. Proper bearing fit and rotor balance are essential.

What operating limits should be considered?

The maximum operating temperature is 760–1050 °C, and maximum operating pressure is 1.0–1.6 MPa. These limits affect material selection and durability. Always confirm these values with the manufacturer for your specific application.

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

Related equipment

Applied To / Applications

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

Center Housing Rotating Assembly (CHRA)
View system integration details

Industrial Ecosystem & Supply Chain Structure

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Center Housing.

CHRA Housing Turbo Center Section Bearing Housing

Data Basis

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

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.

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 · Page last updated 13 October 2026

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