Industry-Verified Manufacturing Data (2026)

Rotor Disk

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Rotor Disk used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Rotor Disk is characterized by the integration of Blade Attachment Slots and Bolt Holes. In industrial production environments, manufacturers listed on CNFX commonly emphasize Nickel-based superalloy construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A rotating disk that holds turbine blades and transmits mechanical energy in turbines and expanders.

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Product Specifications

Technical details and manufacturing context for Rotor Disk

Definition
The rotor disk is a critical rotating component within the turbine/expander section that serves as the mounting platform for turbine blades. It rotates at high speeds to convert thermal energy from working fluids into mechanical energy, transmitting torque through the shaft to drive compressors, generators, or other machinery.
Working Principle
The rotor disk rotates at high angular velocities driven by the impulse or reaction forces from high-pressure, high-temperature gases or steam flowing through the turbine. The blades attached to the disk's periphery extract energy from the fluid, causing the disk to spin and transfer rotational energy to the connected shaft.
Common Materials
Nickel-based superalloy, Titanium alloy, High-strength steel
Technical Parameters
  • Diameter of the rotor disk, typically ranging from 200mm to over 2000mm depending on turbine size and application (mm) Per Request
Components / BOM
  • Blade Attachment Slots
    Precision-machined slots or grooves for mounting turbine blades
    Material: Same as disk material
  • Bolt Holes
    Holes for securing blades or connecting to adjacent disks
    Material: Same as disk material
  • Center Bore
    Central opening for mounting on the turbine shaft
    Material: Same as disk material
Engineering Reasoning
300-650°C temperature, 150-400 m/s tangential velocity, 50-200 MPa centrifugal stress
Creep rupture at 700°C for 1000 hours, yield strength threshold at 250 MPa, critical crack length of 2.5 mm
Design Rationale: Low-cycle fatigue from thermal gradients exceeding 150°C/mm, creep deformation above 0.2% strain at 650°C, stress corrosion cracking in chloride environments above 60°C
Risk Mitigation (FMEA)
Trigger Thermal gradient exceeding 200°C across disk radius during startup
Mode: Radial cracking initiating at blade attachment slots
Strategy: Controlled startup ramp rate of 50°C/minute maximum, finite element analysis-optimized disk geometry with stress concentration factor below 1.8
Trigger Foreign object damage creating surface defect depth exceeding 0.5 mm
Mode: Fatigue crack propagation from stress concentration at defect site
Strategy: Inlet particle separators with 99.9% efficiency for particles >10 μm, shot peening surface treatment to induce 400 MPa compressive residual stress layer

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Rotor Disk.

Turbine Disk Impeller Disk turbine rotor disk replacement high-strength steel rotor disk rotor disk blade attachment slots industrial expander rotor disk nickel superalloy turbine disk

Applied To / Applications

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

Turbine/Expander Section
View system integration details
Turbine Blades/Rotor
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 300 bar
flow rate: Dependent on blade design and rotational speed
temperature: -50°C to 650°C
slurry concentration: Not applicable for clean gas/steam; for slurry expanders, max 15% solids by volume
Media Compatibility
✓ Steam (saturated or superheated) ✓ Natural gas (clean, dry) ✓ Air/nitrogen (non-corrosive)
Unsuitable: Chloride-containing environments (risk of stress corrosion cracking)
Sizing Data Required
  • Required power output (kW or MW)
  • Rotational speed (RPM)
  • Inlet pressure and temperature

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Fatigue cracking
Cause: Cyclic stresses from rotational forces, thermal gradients, or resonant vibrations exceeding material endurance limits, often initiating at stress concentrators like blade roots or bolt holes.
Corrosion pitting and stress corrosion cracking
Cause: Exposure to corrosive environments (e.g., moisture, chemicals) combined with tensile stresses, leading to localized material loss and crack initiation that propagates under operational loads.
Maintenance Indicators
  • Unusual high-frequency vibration or audible 'whining' noise during operation, indicating imbalance, blade damage, or bearing issues.
  • Visible surface discoloration, pitting, or cracks detected during visual inspection, especially near blade edges, hubs, or attachment points.
Engineering Tips
  • Implement regular non-destructive testing (NDT) such as ultrasonic or eddy current inspections to detect subsurface flaws and cracks early, before they reach critical sizes.
  • Control operational parameters to avoid resonant frequencies and excessive thermal cycling, and apply protective coatings or select corrosion-resistant materials suited to the operating environment.

Compliance & Manufacturing Standards

Reference Standards
ISO 1940-1:2003 (Balance quality requirements for rotors in a constant rigid state) ASTM E1444/E1444M-22 (Standard Practice for Magnetic Particle Testing) DIN EN 10204:2004 (Metallic products - Types of inspection documents)
Manufacturing Precision
  • Bore diameter: +/-0.025 mm
  • Surface flatness: 0.05 mm per 100 mm diameter
Quality Inspection
  • Ultrasonic Testing (UT) for internal defects
  • Dye Penetrant Inspection (DPI) for surface cracks

Factories Producing Rotor Disk

Verified manufacturers with capability to produce this product in China

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✓ 95% Supplier Capability Match Found

S Sourcing Manager from Brazil Feb 09, 2026
★★★★★
"Found 40+ suppliers for Rotor Disk on CNFX, but this spec remains the most cost-effective."
Technical Specifications Verified
P Procurement Specialist from Canada Feb 06, 2026
★★★★☆
"The technical documentation for this Rotor Disk is very thorough, especially regarding technical reliability. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from United States Feb 03, 2026
★★★★★
"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Rotor Disk so far."
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.”

18 sourcing managers are analyzing this specification now. Last inquiry for Rotor Disk from Poland (54m ago).

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Frequently Asked Questions

What materials are commonly used for rotor disks in industrial turbines?

Rotor disks are typically manufactured from nickel-based superalloys, titanium alloys, or high-strength steel to withstand high temperatures, stresses, and rotational forces in turbines and expanders.

What are the key components of a rotor disk assembly?

A rotor disk assembly includes blade attachment slots for securing turbine blades, bolt holes for mounting and balancing, and a center bore for shaft connection and torque transmission.

How does a rotor disk function in energy transmission systems?

The rotor disk rotates at high speeds, holding turbine blades that convert fluid energy (steam, gas, or air) into mechanical energy, which is transmitted through the center bore to drive generators, compressors, or other machinery.

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 Machinery and Equipment Manufacturing sector.

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